This section provides information to configure Application Assurance entities using the command line interface. It is assumed that the user is familiar with basic configuration of policies.
3.3.1. Provisioning AA ISA MDA
The following illustrates syntax to provision AA ISA and configure ingress IOM QoS parameters. (The egress IOM QoS is configured in the config>isa>application-assurance-grp>qos context.)
config>card>mda mda-slot
mda-type isa-aa
network
ingress
pool
slope-policy slope-policy-name
resv-cbs percent-or-default
queue-policy network-queue-policy-name
The following output displays an AA ISA configuration example.
*A:cpm-a>config>app-assure# show mda 1/1
===============================================================================
MDA 1/1
===============================================================================
Slot Mda Provisioned Equipped Admin Operational
Mda-type Mda-type State State
-------------------------------------------------------------------------------
1 1 isa-aa isa-ms up up
===============================================================================
*A:cpm-a>config>app-assure#
*A:cpm-a>config>card# info
----------------------------------------------
card-type iom3-xp-c
mda 1
mda-type isa-aa
exit
----------------------------------------------
*A:cpm-a>config>card#
3.3.2. Configuring an AA ISA Group
To enable AA on the router:
Create an AA ISA group.
Assign active and optional backup AA ISAs to an AA ISA group.
Select the forwarding classes to divert.
Enable the group.
Optionally:
Enable group policy partitioning
Configure capacity cost threshold values
Configure the number of transit prefix IP policies
Configure IOM egress queues to the MS-ISA
Enable overload cut through and configure the high and low watermarks values
Configure performance statistics accounting
The following example illustrates AA ISA group configuration with:
Primary AA ISA and warm redundancy provided by the backup AA ISA.
“fail-to-wire” behavior configured on group failure.
BE forwarding class selected for divert.
Default IOM QoS for logical ISA egress ports. The ISA ingress QoS is configured as part of ISA provisioning (config>card>mda>network>ingress>qos).
The following commands illustrate AA ISA group configuration context.
config>isa>application-assurance-group isa-aa-group-id [aa-sub-scale {residential | vpn}] [create]
backup mda-id
description description
divert-fc fc-name
no fail-to-open
isa-capacity-cost-high-threshold threshold
isa-capacity-cost-low-threshold threshold
partitions
primary mda-id
qos
egress
from-subscriber
pool [pool-name]
resv-cbs percent-or-default
slope-policy slope-policy-name
port-scheduler-policy port-scheduler-policy-name
queue-policy network-queue-policy-name
to-subscriber
pool [pool-name]
resv-cbs percent-or-default
slope-policy slope-policy-name
port-scheduler-policy port-scheduler-policy-name
queue-policy network-queue-policy-name
[no] shutdown
The following output displays an AA ISA group configuration example.
A:ALU-A>config>isa>aa-grp# info detail
----------------------------------------------
no description
primary 1/2
backup 2/2
no fail-to-open
isa-capacity-cost-high-threshold 4294967295
isa-capacity-cost-low-threshold 0
no partitions
divert-fc be
qos
egress
from-subscriber
pool
slope-policy "default"
resv-cbs default
exit
queue-policy "default"
no port-scheduler-policy
exit
to-subscriber
pool
slope-policy "default"
resv-cbs default
exit
queue-policy "default"
no port-scheduler-policy
exit
exit
exit
no shutdown
----------------------------------------------
A:ALU-A>config>isa>aa-grp#
3.3.2.1. Configuring Watermark Parameters
Use the following CLI syntax to configure thresholds for logs and traps when under high consumption of the flow table. The flow table has a limited size and these thresholds can be established to alert the user that the table is approaching capacity. These flow table watermarks represent number of flow contexts allocated on the ISA, which will be slightly higher than the actual number of existing flows at the point when the watermark is reached.
The low threshold is used while the high threshold is used as an alarm.
config>application-assurance
flow-table-high-wmark high-watermark
flow-table-low-wmark low-watermark
3.3.3. Configuring a Group Policy
3.3.3.1. Beginning and Committing a Policy Configuration
To enter the mode to create or edit Application Assurance policies, you must enter the begin keyword at the config>app-assure>group>policy prompt. The commit command saves changes made to policies during a session. Changes do not take effect in the system until they have performed the commit function. The abort command discards changes that have been made to policies during a session.
The following error message displays when creating or modifying a policy without entering begin first.
A:ALA-B>config>app-assure>group>policy#
MINOR: AA #1005 Invalid Set - Cannot proceed with changes when in non-edit mode
There are no default policy options. All parameters must be explicitly configured.
Use the following CLI syntax to begin a policy configuration.
config>app-assure# group group-id
policy
begin
Use the following CLI syntax to commit a policy configuration.
config>app-assure# group group-id
policy
commit
3.3.3.2. Aborting a Policy Configuration
Use the following CLI syntax to abort a policy configuration.
config>app-assure# group group-id
policy
abort
3.3.3.3. Configuring an IP Prefix List
An operator can use IP lists to define a list of IP addresses (along with any masks). This list can be later referenced in AQPs, application filters and/or session-filters.
Use the following CLI syntax to configure an application filter entry.
config>aa>group>policy>app-assurance>group <aa-group-id>
[:<partition>
] ip-prefix-list <prefix-list-name> [create]
no ip-prefix-list <prefix-list-name>
description <description>
no description
prefix <address/mask> [name <prefix-name>]
no prefix <address/mask>
*A:Dut-A>config>app-assure>group# ip-prefix-list AllowedLAN1Hosts create
*A:Dut-A>config>app-assure>group>pfx>$ description "allowed hosts"
*A:Dut-A>config>app-assure>group>pfx>$ prefix 10.10.8.2/32
*A:Dut-A>config>app-assure>group>pfx>$ prefix 10.10.8.180/32
*A:Dut-A>config>app-assure>group>pfx>$ prefix 10.10.8.231/32
*A:Dut-A>config>app-assure>group>pfx>$ exit
*A:Dut-A>config>app-assure>group#
*A:Dut-A>config>app-assure>group# ip-prefix-list "AllowedLan1Hosts"
*A:Dut-A>config>app-assure>group>pfx># info
----------------------------------------------
description "allowed hosts"
prefix 10.10.8.2/32
prefix 10.10.8.180/32
prefix 10.10.8.231/32
----------------------------------------------
*A:Dut-A>config>app-assure>group>pfx>#
3.3.3.4. Configuring AA Session Filters
Session filters can be configured to allow stateful firewall use-cases. Refer to AA Group Commands for syntax and CLI descriptions.
*A:Dut-A>config>app-assure>group# session-filter <session-filter-name> [create]
default-action {permit | deny} [event-log <event-log-name>]
description <description-string>
entry <entry-id> [create]
action {permit | deny} [event-log <event-log-name>]
match
dst-ip <ip-address>
dst-ip ip-prefix-list <ip-prefix-list-name>
no dst-ip
dst-port {eq | gt | lt} <port-num>
dst-port range <start-port-num> <end-port-num>
dst-port port-list <port-list-name>
no dst-port
ip-protocol-num <ip-protocol-number>
no ip-protocol-num
src-ip <ip-address>
no src-ip
src-ip ip-prefix-list <ip-prefix-list>
src-port {eq | gt | lt} <port-num>
src-port range <start-port-num> <end-port-num>
src-port port-list <port-list-name>
no src-port
*A:Dut-A>config>app-assure>group# session-filter " denyUnsolictedwMgntCntrl" create
description “S-FW opted-in sub – allow ISP access"
default-action deny event-log “FW_log”
entry 10 create
description "allow ICMP access from ISP LAN#1"
match
ip-protocol-num icmp
src-ip 10.10.8.0/24
exit
action permit
exit
entry 30 create
description "allow all TCP (e.g. FTP/telnet)access from ISP LAN#2"
match
ip-protocol-num tcp
src-ip 192.168.0.0/24
exit
action permit
entry 40 create
description "allow TCP on port 80 /HTTP access from a IP List on ISP LAN#1"
match
ip-protocol-num tcp
src-ip ip-prefix-list AllowedLAN1Hosts
dst-port eq 80
exit
action permit
exit
*A:Dut-A>config>app-assure>group>sess-fltr$ info
----------------------------------------------
description "S-FW opted-in sub . allow ISP access"
default-action deny event-log “FW_Log”
entry 10 create
description "allow ICMP access from ISP LAN#1"
match
ip-protocol-num icmp
src-ip 10.10.8.0/24
exit
action permit
exit
entry 20 create
description "allow ICMP access from ISP LAN#2"
action deny
exit
entry 30 create
description "allow all TCP (e.g. FTP/telnet)access from ISP LAN#2"
match
ip-protocol-num tcp
src-ip 192.168.0.0/24
exit
action permit
exit
entry 40 create
description "allow TCP on port 80 /HTTP access from a IP List on
ISP LAN#1"
match
ip-protocol-num tcp
src-ip ip-prefix-list "AllowedLan1Hosts"
dst-port eq 80
exit
action permit
exit
----------------------------------------------
*A:Dut-A>config>app-assure>group>sess-fltr$
*A:Dut-A>config>app-assure>group>policy>eqp>
entry 110 create
description “FW for managed opted-in subs”
match
traffic-direction network-to-subscriber
exit
action
session-filter “ denyUnsolictedwMgntCntrl "
fragment-drop all event-log "FW_log"
error-drop event-log “FW_log”
overload-drop
exit
exit
*A:Dut-A>config>app-assure>group>policy>aqp>entry# info
----------------------------------------------
description "FW for managed opted-in subs."
match
traffic-direction network-to-subscriber
exit
action
session-filter "denyUnsolictedwMgntCntrl"
fragment-drop all event-log "FW_log"
error-drop event-log “FW_log”
overload-drop
exit
no shutdown
----------------------------------------------
*A:Dut-A>config>app-assure>group>policy>aqp>entry#
3.3.3.5. Configuring an Application Group
An operator can configure an application group to group multiple application into a single application assurance entity by referencing those applications in the group created.
Use the following CLI syntax to configure an application group.
config>app-assure>group>policy# app-group application-group-name [create]
description description
The following example displays an application group configuration.
*A:ALA-48>config>app-assure>group>policy# app-group "Peer to Peer" create
*A:ALA-48>config>app-assure>group>policy>app-grp# info
----------------------------------------------
description "Peer to Peer file sharing applications"
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>app-grp#
3.3.3.6. Configuring an Application
An operator can configure an application to group multiple protocols, clients or network applications into a single Application Assurance application by referencing it later in the created application filters as display in other sections of this guide.
Use the following CLI syntax to configure an application.
config>app-assure>group>policy# application application-name [create]
app-group app-group-name
description description
The following example displays an application configuration.
*A:ALA-48>config>app-assure>group>policy# application "SQL" create
*A:ALA-48>config>app-assure>group>policy>app# info
----------------------------------------------
description "SQL protocols"
app-group "Business Critical Applications"
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>app#
3.3.3.7. Configuring an Application Filter
An operator can use an application filter to define applications based on ALU protocol signatures and a set of configurable parameters like IP flow setup direction, IP protocol number, server IP address and server TCP/UDP port. An application filter references an application configured as previously shown.
Use the following CLI syntax to configure an application filter entry.
config>app-assure>group>policy# app-filter
entry entry-id [create]
application application-name
description description-string
expression expr-index expr-type {eq | neq} expr-string
flow-setup-direction {subscriber-to-network | network-to-subscriber | both}
http-match-all-requests
ip-protocol-num {eq | neq} protocol-id
network-address {eq | neq} ip-address
network-address {eq | neq} ip-prefix-list ip-prefix-list-name
protocol {eq | neq} protocol-signature-name
server-address {eq | neq} ip-address
server-address {eq | neq} dns-ip-cache dns-ip-cache-name
server-address {eq | neq} ip-prefix-list ip-prefix-list-name
server-port {eq | neq | gt | lt} server-port-number
server-port {eq | neq} range start-port-num end-port-num
server-port {eq} {port-num | range start-port-num end-port-num} first-packet-trusted | first-packet-validate}
no shutdown
The following example displays an application filter configuration.
*A:ALA-48>config>app-assure>group>policy>app-filter# entry 30 create
*A:ALA-48>config>app-assure>group>policy>app-filter>entry# info
----------------------------------------------
description "DNS traffic to local server on expected port #53"
protocol eq "dns"
flow-setup-direction subscriber-to-network
ip-protocol-num eq *
server-address eq 192.0.2.0/32
server-port eq 53
application "DNS_Local"
no shutdown
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>app-filter>entry#
3.3.3.8. Configuring an Application Profile
Use the following CLI syntax to configure an application profile.
config>app-assure>group>policy# app-profile app-profile-name [create]
characteristic characteristic-name value value-name
description description-string
[no] aa-sub-suppressible
divert
The following example displays an application profile configuration.
*A:ALA-48>config>app-assure>group>policy# app-profile "Super" create
*A:ALA-48>config>app-assure>group>policy>app-prof# info
----------------------------------------------
description "Super User Application Profile"
divert
characteristic "Server" value "Prioritize"
characteristic "ServiceBw" value "SuperUser"
characteristic "Teleworker" value "Yes"
characteristic "VideoBoost" value "Priority"
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>app-prof#
3.3.3.9. Configuring Suppressible App-Profile with SRRP
For information about SRRP, refer to the 7450 ESS, 7750 SR, and VSR Triple Play Service Delivery Architecture Guide.
In the context of an ESM SRRP deployment, the operator can define at the app-profile level if the subscriber will be diverted to the ISA-AA card per SRRP group interface. This can be useful to reduce the total number of ISA cards required in the event of a switch-over from a primary to backup SRRP node when AA is used as a value-add service for selected subscribers.
To configure the network for suppressible app-profiles in the context of SRRP the operator needs to:
Enable the capability to suppress AA subscribers on a given SRRP group interface, typically by selecting backup SRRP group interfaces.
ESM subscribers with a valid app-profile are diverted to AA by default, to suppress selected group of subscribers using AA for optional value-add services. The operator then specifies which app-profile will be suppressed and therefore not diverted to AA.
Use the following CLI syntax to enable the capability to suppress ESM subscribers from a backup SRRP group interface:
config>service>vprn>sub-if>grp-if# suppress-aa-sub [create]
characteristic characteristic-name value value-name
description description-string
[no] aa-sub-suppressible
divert
The following example displays an application profile configuration used for premium subscribers, this type of subscriber will always be diverted to Application Assurance, it is also the default configuration:
7750>config>app-assure>group>policy# info
----------------------------------------------
app-profile "Premium" create
characteristic "Parental-Control" eq "Yes"
divert
exit
----------------------------------------------
The following example displays an application profile configuration for best effort / value-add subscribers not diverted to Application Assurance on the SRRP group interface configured with “suppress-aa-sub”:
7750>config>app-assure>group>policy# info
----------------------------------------------
app-profile "1-default" create
divert
aa-sub-suppressible
exit
----------------------------------------------
3.3.3.10. Configuring Application Service Options
Use the following CLI syntax to configure application service options.
config>app-assure>group>policy# app-service-options
characteristic characteristic-name [create]
default-value value-name
value value-name
The following example displays an application service options configuration.
*A:ALA-48>config>app-assure>group>policy>aso# info
----------------------------------------------
characteristic "Server" create
value "Block"
value "Permit"
value "Prioritize"
default-value "Block"
exit
characteristic "ServiceBw" create
value "Lite_128k"
value "Power_5M"
value "Reg_1M"
value "SuperUser"
default-value "Reg_1M"
exit
characteristic "Teleworker" create
value "No"
value "Yes"
default-value "No"
exit
characteristic "VideoBoost" create
value "No"
value "Priority"
default-value "No"
exit
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>aso#
3.3.3.11. Configuring a Policer
Use the following CLI syntax to configure a policer.
config>app-assure>group>policy# policer policer-name type type granularity granularity create
action {priority-mark | permit-deny}
adaptation-rule pir adaptation-rule
description description-string
mbs maximum burst size
rate pir-rate
tod-override tod-override-id [create]
The following example displays an Application Assurance policer configuration.
*A:ALA-48>config>app-assure>group# policer "RegDown_Policer" type dual-bucket-
bandwidth granularity subscriber create
*A:ALA-48>config>app-assure>group>policer# info
----------------------------------------------
description "Control the downstream aggregate bandwidth for Regular
1Mbps subscribers"
rate 1000 cir 500
mbs 100
cbs 50
----------------------------------------------
*A:ALA-48>config>app-assure>group>policer#
3.3.3.12. Configuring an Application QoS Policy
Use the following CLI syntax to configure an application QoS policy.
config>app-assure>group>policy# app-qos-policy
entry entry-id [create]
action
bandwidth-policer policer-name
drop
error-drop [event-log event-log-name]
flow-count-limit policer-name
flow-rate-limit policer-name
fragment-drop {all | out-of-order} [event-log event-log-name]
http-error-redirect redirect-name
mirror-source [all-inclusive] mirror-service-id
overload-drop [event-log event-log-name]
remark
dscp in-profile dscp-name out-profile dscp-name
fc fc-name
priority priority-level
url-filter url-filter-name characteristic characteristic-name
description description-string
match
aa-sub sap {eq | neq} sap-id
aa-sub esm {eq | neq} sub-ident-string
aa-sub spoke-sdp {eq | neq} sdp-id:vc-id
app-group {eq | neq} application-group-name
application {eq | neq} application-name
characteristic characteristic-name {eq} value-name
dscp {eq | neq} dscp-name
dst-ip {eq | neq} ip-address[/mask]
dst-ip {eq | neq} ip-prefix-list ip-prefix-list-name
dst-port {eq | neq} port-num
dst-port {eq | neq} range start-port-num end-port-num
src-ip {eq | neq} ip-address[/mask]
src-ip {eq | neq} ip-prefix-list ip-prefix-list-name
src-port {eq | neq} port-num
src-port {eq | neq} range start-port-num end-port-num
traffic-direction {subscriber-to-network | network-to-subscriber | both}
no shutdown
The following example displays an application QoS policy configuration.
*A:ALA-48>config>app-assure>group>policy>aqp# entry 20 create
----------------------------------------------
description "Limit downstream bandwidth to Reg_1M subscribers"
match
traffic-direction network-to-subscriber
characteristic "ServiceBw" eq "Reg_1M"
exit
action
bandwidth-policer "RegDown_Policer"
exit
no shutdown
----------------------------------------------
*A:ALA-48>config>app-assure>group>policy>aqp#
The following example display an AQP entry configuration to mirror all positively identified only P2P traffic (AppGroup P2P) for a subset of subscribers with ASO characteristic aa-sub-mirror enabled.
A:ALA-48>config>app-assure>group>policy>aqp#
-------------------------------------------------------------------------------
entry 100 create
match
app-group eq P2P
characteristic aa-sub-mirror eq enabled
exit
action # mirror to an existing mirror service id
mirror-source 100
exit
no shutdown
exit
-------------------------------------------------------------------------------
A:ALA-48>config>app-assure>group>policy>aqp#
The following example displays an AQP entry to mirror all P2P traffic (all positively identified P2P traffic and any unidentified traffic that may or may not be P2P - AppGroup P2P) for a subset of subscribers with ASO characteristic aa-sub-mirror enabled (the order is significant):
A:ALA-48>config>app-assure>group>policy>aqp>entry#
-------------------------------------------------------------------------------
entry 100 create
match
app-group eq P2P
characteristic aa-sub-mirror value enabled
exit
action
mirror-source all-inclusive 100
exit
no shutdown
exit
-------------------------------------------------------------------------------
A:ALA-48>config>app-assure>group>policy>aqp#
3.3.3.13. Configuring an Application and DNS IP Cache for URL Content Charging Strengthening
In the context of URL content charging, also known as zero rating, the DNS IP cache (dns-ip-cache command) feature ensures that only legitimate traffic is classified in a given application and charging-group. Subscribers’ DNS responses matching a list of domain names used for content charging populate the DNS IP cache. The system can then be configured to create app-filters matching HTTP or HTTPS expressions as well as the IP cache ensuring that traffic is properly classified. If the operator utilizes proxies in their network, they may also configure a maximum of 8 IP addresses which match the IP addresses of the proxies used. Traffic whose destination IP address matches one of the configured proxies will be assumed to be legitimate traffic.
To configure the system for URL content charging strengthening with a dns-ip-cache the operator needs to:
Create an application of interest and its related app-filter’s URL expressions. This application is typically mapped into a charging-group.
Create a dns-ip-cache. Configure parameters so the IP cache is populated by the domain names from the application mapped to the zero rating charging group and specify which DNS server IP addresses the IP cache will listen from.
Configure a AQP to enable the dns-ip-cache.
Optionally, configure static IP addresses matching the IP addresses of the trusted proxies
Use the following CLI syntax to create a dns-ip-cache:
config>app-assure>group#
dns-ip-cache dns-ip-cache-name [create]
dns-match
description <description-string>
no description
domain <domain-name> expression <expression>
no domain <domain-name>
server-address <server-address> [name <server-name>]
no server-address <server-address>
ip-cache
size <cache-size>
high-watermark <percent>
low-watermark <percent>
[no] static-address <static-ip-address>
[no] shutdown
The following example displays a configuration for a dns-ip-cache configured to snoop DNS responses for two different domains “*.domain1.com” and “*domain2.com” which are zero rated or charged specifically by the operator. The configuration only uses DNS responses from the DNS server addresses configured within the dns-match to populate the ip-cache:
7750>config>app-assure>group# info
----------------------------------------------
dns-ip-cache "dns-ip-cache1" create
description "DNS IP Cache #1"
dns-match
domain "Sponsor#1-Domain#1" expression "*.domain1.com$"
domain "Sponsor#1-Domain#2" expression "*.domain2.com$"
server-address 10.8.4.4 name "CompanyName"
server-address 10.8.8.8 name "CompanyName"
server-address 192.168.100.11 name "OperatorX-DNS1"
server-address 192.168.100.12 name "OperatorX-DNS2"
exit
ip-cache
size 1000
high-wmark 90
low-wmark 80
exit
no shutdown
exit
----------------------------------------------
The domains configured in the dns-ip-cache must match the app-filter expressions for the applications zero rated or charged specifically by the operator. The following example displays the charging-group Zero Rated and application Sponsor Content #1 configuration:
7750>config>app-assure>group>policy# info
----------------------------------------------
charging-group "Zero Rated" create
description "Zero Rated Content"
export-id 10
exit
app-group "Web" create
exit
application "Sponsor Content #1" create
description "Application#1 - Content Zero Rated"
app-group "Web"
charging-group "Zero Rated"
exit
app-filter
entry 100 create
expression 1 http-host eq "*.sponsor1-domain1.com$"
server-address eq dns-ip-cache "dns-ip-cache1"
application "Sponsor Content #1"
no shutdown
exit
entry 110 create
expression 1 http-host eq "*.domain2.com$"
server-address eq dns-ip-cache "dns-ip-cache1"
application "Sponsor Content #1"
no shutdown
exit
exit
---------------------------------------------------------------------------
The following example displays the AQP entry to enable the dns-ip-cache to snoop DNS responses; this can be optionally based on ASO characteristics:
A:7750>config>app-assure>group>policy>aqp# entry 100 create
match
characteristic "dns-ip-cache" eq "yes"
exit
action
action dns-ip-cache "dns-ip-cache1"
exit
no shutdown
3.3.3.14. Configuring an HTTP Error Redirect
Use the following CLI syntax to configure an HTTP error redirect policy:
config>app-assure>group>
http-error-redirect redirect-name create
no http-error-redirect redirect_name
description description-string
no description
error-code error-code [custom-msg-size custom-msg-size]
no error-code error-code
http-host http-host // eg. www.demo.barefruit.com
no http-host
participant-id participant-id // 32-char string used by template 1
no participant-id
no] shutdown
template template-id // {1, 2} one for Barefruit, 2= Xerocole
no template
The following example displays an Application Assurance HTTP redirect configuration.
*A:ALA-48>config>app-assure>group# http-error-redirect "redirect-404" create
description “redirect policy of 404 to Barefruit servers”
error-code 404
http-host
att.barefruit.com
participant-id att-ISP
template 1
*A:ALA-48>config>app-assure>group> http-error-redirect# redirect-404 info
----------------------------------------------
description "redirect policy of 404 to Barefruit servers"
template 1
http-host "att.barefruit.com"
participant-id "att-ISP"
error-code 404
*A:ALA-48>config>app-assure>group>http-error-redirect#
3.3.3.15. Configuring HTTP Header Enrichment
Use the following CLI syntax to configure an HTTP header Enrichment policy:
config>app-assure>group> http-enrich <http_enrich_name> [create]
[no] description <description-string>
[no] shutdown
[no] field <field_name> name <header_name>
// Where “Field name” can be:
// subscriber-ip: Header name for subscriber IP
// subscriber-id: Header name for the subscriber ID
// static-string: Header name for inserted string
[no] http-enrich <http_enrich_name>
The following example displays an Application Assurance HTTP header enrichment configuration.
*A:BNG>config>app-assure>group# http-enrich enrich_example create
*A:BNG>config>app-assure>group>http-enrich$ description "enrich HTTP headers with
subscriber IP and subscriber ID"
*A:BNG>config>app-assure>group>http-enrich$ field "static-string" name "x-string"
*A:BNG>config>app-assure>group>http-enrich$ field "static-string" static-string
"orange"
*A:BNG>config>app-assure>group>http-enrich$ field "subscriber-id" name "x-subID"
*A:BNG>config>app-assure>group>http-enrich$ field "subscriber-id" anti-spoof
*A:BNG>config>app-assure>group>http-enrich$ field "subscriber-ip" name x-subIP
*A:BNG>config>app-assure>group>http-enrich$ field "subscriber-ip" encode type md5 key
"secret10"
----------------------------------------------
*A:BNG>config>app-assure>group>http-enrich$ info
----------------------------------------------
field "static-string"
name "x-string"
static-string "orange"
exit
field "subscriber-id"
name "x-subID"
anti-spoof
exit
field "subscriber-ip"
name "x-subIP"
encode type md5 key
"bF0sZZDNT8DbZoVJHD1vrYr5mJaEggEqWbSvPhgIcPW6hym0sc08O." hash2
exit
----------------------------------------------
*A:BNG>config>app-assure>group>http-enrich$
In addition, the following show routine displays various HTTP enrichment-related statistics:
show application-assurance group 1 http-enrich "MyTemplate"
===============================================================================
Application Assurance Group 1 HTTP Enrichment "MyTemplate"
===============================================================================
Description : (Not Specified)
Admin Status : Up
AQP Referenced: No
-------------------------------------------------------------------------------
Name Field Enabled
Features
-------------------------------------------------------------------------------
subscriber-ip MyField M
subscriber-id Sub-ID AC
-------------------------------------------------------------------------------
A=anti-spoof,C=encode-cert,M=encode-md5,R=encode-rc4
----------------------------------------------------------------------
Group Enriched Not Enriched
----------------------------------------------------------------------
1 0 0
----------------------------------------------------------------------
Total 0 0
----------------------------------------------------------------------
===============================================================================
3.3.3.16. Configuring an HTTP Redirect Policy
Use the following CLI syntax to configure an HTTP redirect policy:
config>app-assure>group# http-redirect redirect-name [create]
description <description-string>
no description
template <template-id >
redirect-url URL // redirect URL e.g. www.isp.com/redirect.html
no redirect-url
[no] shutdown
no http-redirect <redirect-name>
The following example displays an AA HTTP redirect configuration.
*A:ALA-48>config>app-assure>group# http-redirect "redirect1" create
description “redirect policy for blocked http content traffic without url
parameters”
template 3
redirect-url http://www.isp.com/redirect.html
no shutdown
The following example displays an Application Assurance http-redirect configuration using macro substitution to append url parameters within the redirect url:
*A:ALA-48>config>app-assure>group# http-redirect "redirect2" create
description "redirect policy for blocked http content traffic with url parameters"
template 5
redirect-url "http://www.isp.com/
redirect.html?requestedurl=$URL&subscriberid=$SUB&subscriberip=$IP&routerid=$RTRI
D&vsa=$URLPRM"
no shutdown
The following example displays AQP entry to block all http gaming traffic (AppGroup BlockedContent) and perform redirect:
A:ALA-48>config>app-assure>group>policy>aqp>entry#
-------------------------------------------------------------------------------
entry 100 create
match
app-group eq BlockedContent
exit
action
drop
http-redirect redirectgaming
exit
no shutdown
exit
-------------------------------------------------------------------------------
A:ALA-48>config>app-assure>group>policy>aqp#
3.3.3.17. Configuring a Captive Redirect HTTP Redirect Policy
The traditional HTTP redirect policy is used to redirect flows on the HTTP response packet, meaning the TCP three-way handshake and the original HTTP request are allowed by the 7750 SR to the Internet before the subscriber is redirected. The captive redirect HTTP redirect policy is used to redirect flows without sending any traffic to the Internet unless it matches a configurable whitelist by terminating TCP sessions in the ISA-AA cards, in which case HTTP flows are redirected to a predefined redirect URL while non-HTTP TCP flows are TCP reset.
3.3.3.17.1. Captive-Redirect and HTTPS Flows Redirection
The captive redirect HTTP redirect policy can be optionally configured to redirect HTTPS sessions in addition to HTTP to a pre-defined redirect landing page, typically the captive-portal URL in the context of a WiFi network.This capability is particularly useful when the router is used to provide a captive-portal type of access, as it allows the operator to improve the user experience by redirecting the subscriber’s web browser sessions to the desired captive-portal landing page when the user first connects to the network using HTTPS instead of HTTP.
This capability is particularly useful when the router is used to provide a captive-portal type of access, as it allows the operator to improve the user experience by redirecting the subscriber’s web browser sessions to the desired captive-portal landing page when the user first connects to the network using HTTPS instead of HTTP.
Prior to the introduction of this feature, users opening their web browsers to an HTTPS URL when first connecting to a new Wi-Fi network and expecting to be redirected to a captive portal were instead presented with an error page automatically generated by the web browser since the session was dropped or reset by the network, thus ultimately preventing the user from connecting. Most non-technical users connecting to a captive-portal network may not know the difference between HTTP and HTTPS when it comes to login/redirection, and a number of subscribers may not connect or may get frustrated trying multiple different links prior to a successful Wi-Fi authentication.
When the system is configured for captive-redirect redirect-https it will terminate transport layer security (TLS) TCP sessions in the ISA-AA cards and return a self-signed certificate back to the user. Upon the user acceptance of the security warning generated by the web browser, the web session will then automatically be redirected to the configured captive-portal landing page.
Captive redirect policy supports redirection for HTTP, HTTPS, HTTP2, SPDY, and TCP Fast Open connections.
A session-filter is used to define the criteria for permitting or redirecting flows using the captive redirect HTTP redirect policy. Typically the operator needs to permit UDP on port 53 for DNS and they can optionally permit other content based on IP address, port number, IP prefix list, or DNS IP cache thus allowing specific on-net of off-net applications through the captive redirect policy.
To configure the system for captive redirect HTTP redirect the operator needs to:
Create an http-redirect policy. If the ISA group aa-sub-scale mode is configured for residential or VPN, then configure the http-redirect policy for captive-redirect and associate the appropriate VLAN id AA Interface (an aa-interface routable within the subscriber’s service must be created for each ISA-AA card in the system). If the ISA group aa-sub-scale mode is configured for DSM, then there is no need to associate the http-redirect policy to a VLAN id and no need to create an AA Interface.
Create a session filter policy to allow at the minimum UDP on port 53. Additional traffic can be whitelisted based on a statically defined IP prefix list or a dynamic DNS IP cache policy. The redirect landing page should be configured using IP prefixes.
The last action of the session filter should be set to http-redirect the remaining flows using a predefined captive redirect HTTP redirect policy.
Use the following CLI syntax to create a captive redirect HTTP redirect policy:
config>app-assure>group# http-redirect <redirect-name> [create]
captive-redirect
vlan-id <service-port-vlan-id>
no vlan-id
description <description-string>
no description
[no] redirect-https
redirect-url <redirect-url>
no redirect-url
[no] shutdown
[no] tcp-client-reset
template <template-id>
no template
no http-redirect <redirect-name>
The following example displays a typical configuration for a session filter user in the context of captive redirect:
A:7750# configure application-assurance group 1:1 create
A:7750>config>app-assure>group# info
----------------------------------------------
session-filter "wifi-unauthenticated" create
default-action deny
entry 5 create
match
ip-protocol-num udp
dst-port eq 53
exit
action permit
exit
entry 10 create
match
dst-ip dns-ip-cache "whitelist"
exit
action permit
exit
entry 15 create
description "Allow traffic to the redirect landing page server"
match
ip-protocol-num tcp
dst-port eq 80
dst-ip 172.16.70.100/32
exit
action permit
exit
entry 20 create
match
ip-protocol-num tcp
exit
action http-redirect "redirect-portal"
exit
exit
----------------------------------------------
The following example displays a typical configuration for the AA interface used by the captive redirect HTTP redirect policy for ESM Subscribers (DSM does not require the configuration of the AA Interface):
A:7750# configure service ies 1 customer 1 create
A:7750>config>service>ies# info
----------------------------------------------
aa-interface "aa-if-captive-redirect-isa_1-2" create
description "AA Interface for ISA-AA card 1/2"
address 172.16.3.1/31
sap 1/2/aa-svc:20 create
no shutdown
exit
no shutdown
exit
----------------------------------------------
The following example displays a typical configuration for the HTTP redirect policy for ESM Subscribers (DSM does not require the configuration of the VLAN ID):
A:7750# configure application-assurance group 1
A:7750>config>app-assure>group>http-redir# info
----------------------------------------------
template 5
tcp-client-reset
redirect-https
redirect-url "http://172.16.70.100/Redirect/redirect-
portal.html?RequestedURL=$URL"
captive-redirect
vlan-id 20
exit
no shutdown
----------------------------------------------
3.3.3.18. Configuring ICAP URL Filtering
To configure the system for ICAP URL Filtering, the operator needs to:
Create an aa-interface and assign an ip address to each AA ISA within an IES or VPRN service. This routed interface is then used by the system to establish TCP communication with the ICAP server.
Create an http-redirect policy (used by the url-filter to redirect HTTP or HTTPS traffic).
Create a url-filter, configure the icap server ip-address, redirect-policy, and default action.
Verify that the aa-interfaces and url-filter are operationally up.
Use the following CLI syntax to configure the aa-interfaces for each AA ISA:
config>service>vprn# aa-interface <aa-if-name> [create]
config>service>vprn>aa-if# aa-interface interface <ip-int-name> [create]
description <description-string>
no description
address <ipv4_subnet/31>
no address
sap <card/mda/aa-svc:vlan> [create]
description <description-string>
no description
egress
[no] filter
[no] qos
exit
ingress
[no] qos
exit
[no] shutdown
exit
The following example displays an AA interface created for the ISA card 1/2 using IP address 172.16.2.1/31:
A:7750>config>service>ies# info
----------------------------------------------
aa-interface "aa-if1" create
address 172.16.2.1/31
sap 1/2/aa-svc:10 create
egress
filter ip 10
exit
no shutdown
exit
no shutdown
exit
In the example above, 172.16.2.1 is used by the IOM side of the interface while the ISA itself is automatically assigned 172.16.2.0 based on the /31 subnet.
Recommendations:
More than one aa-interface can be configured per AA ISA card, however, the operator needs to use the same service vlan across all these interfaces for a given url-filter object.
Configure an egress ip filter under the sap towards the ISA AA interface to only allow selected ip addresses or subnet (subnet examples: icap servers, network management).
Use the following CLI syntax to configure the url-filter:
config>app-assure>group#
url-filter <url-filter-name> [create]
default-action {allow | block-all | block-http-redirect <redirect-name>}
no default-action
http-redirect <http-redirect-name>
no http-redirect
http-request-filtering {all | first}
icap
custom-x-header <x-header-name>
[no] custom-x-header
vlan-id <service-port-vlan-id>
no vlan-id
server <ip-address[:port]> [create]
description <description-string>
no description
[no] shutdown
no server <ip-address[:port]>
no url-filter <url-filter-name>
The following example displays a url-filter configuration:
*A:7750>config>app-assure>group# url-filter "filter1" create
default-action block-http-redirect "http-redirect-portal"
icap
vlan-id 10
server 172.16.1.101 create
no shutdown
exit
exit
no shutdown
The following example displays the AQP entry to enable icap url-filtering for opted-in subscribers based on ASO characteristics:
A:7750>config>app-assure>group>policy>aqp# entry 100 create
match
characteristic "url-filter" eq "yes"
exit
action
url-filter "filter1"
exit
no shutdown
Optionally the operator can add a custom-x-header to the ICAP request in order for the ICAP server to filter traffic based on this new x-header value instead of filtering based on subscriber names. This is done by defining a new ASO characteristic for the different ICAP filtering service packages used in the network and referring the characteristic name in the url-filter AQP action.
The following example displays a url-filter configuration with the custom-x-header field added to the ICAP request:
A:7750>config>app-assure>group# url-filter "filter1" create
default-action block-http-redirect "http-redirect-portal"
http-redirect "http-redirect-portal"
icap
custom-x-header "Filtering-Policy"
vlan-id 10
server 172.16.1.101 create
no shutdown
exit
exit
no shutdown
The following example displays the App-Service-Option characteristic used to define the type of filtering policy available:
A:7750>config>app-assure>group>policy>aso# info
----------------------------------------------
characteristic "url-filter-policy" create
value "filtering-policy-1" #less than 10 years old
value "filtering-policy-2" # less than 16 years old
value "mcdonalds"
value "none"
value "starbucks"
default-value "none"
exit
----------------------------------------------
The following example displays the App-Qos-Policy action required to add the appropriate ASO value to the ICAP custom-x-header custom field:
A:7750>config>app-assure>group>policy>aqp# entry 100 create
match
characteristic "url-filter" eq "yes"
exit
action
url-filter "filter1" characteristic "url-filter-policy"
exit
no shutdown
3.3.3.19. Configuring Local URL-List Filtering
To configure the system for local URL-list filtering, the operator needs to:
Create a URL-list policy referencing a valid file located on the compact flash
Create a url-filter policy for local-filtering by referencing this URL-list
Create an AQP to apply this url-filter policy
Use the following CLI syntax to create a URL-list:
config>app-assure>group# url-list <url-list-name> [create]
description <description-string>
no description
decrypt-key <key | hash-key | hash2-key> [hash | hash2]
no decrypt-key
file <file-url>
no file
[no] shutdown
size <url-list-size>
[standard | extended] - Default : standard
The decryption key is optional, if the decryption key is not specified the system will assume that the file is not encrypted. To encrypt a file in Linux using the supported encryption format use the following command:
Linux# openssl des3 -nosalt -in <input-file.txt> -out <output.enc>
The following example displays a URL-list configuration:
A:7750>config>app-assure>group# url-list url-list1 create
----------------------------------------------
description "Local List for URL Filtering"
decrypt-key ".i84/P1uS0lMGoQkae7mAV2Oj10n726Z" hash2
file "cf3:\url-list1.enc"
no shutdown
----------------------------------------------
Use the following CLI syntax to create a url-filter policy for local-filtering:
config>app-assure>group# url-filter <url-filter-name> [create]
url-filter <url-filter-name> [create]
description <description-string>
no description
default-action {allow | block-all | block-http-redirect <redirect-name>}
no default-action
[no] http-redirect <redirect-name>
http-request-filtering {all | first}
local-filtering
[no] url-list <url-list-name>
[no] shutdown
The following example displays a url-filter configured for local-filtering:
A:7750>config>app-assure>group# url-filter "url-blacklist1" create
A:7750>config>app-assure>group>url-filter# info
----------------------------------------------
default-action allow
http-redirect "http-redirect-portal"
local-filtering
url-list "url-list1"
exit
no shutdown
----------------------------------------------
The default action should always be configured to “allow” when the url-filter is configured for local-filtering. The default-action in this context represents the action the system will take in case the local-list file is not accessible; this scenario may happen if the source file was corrupted or if the compact flash card was not accessible.
The following example displays the AQP entry to enable ICAP url-filtering for opted-in subscribers based on ASO characteristics:
A:7750>config>app-assure>group>policy>aqp# entry 100 create
match
characteristic "child-protection" eq "yes"
exit
action
url-filter "url-blacklist1"
exit
no shutdown
3.3.3.20. Configuring HTTP Notification
Use the following CLI syntax to configure an HTTP Notification policy.
config>app-assure>group#
http-notification <http-notification-name> [create]
description <description-string>
no description
script-url <script-url-name>
no script-url
interval {one-time | <minimum-interval>}
template <template-id>
no template
[no] shutdown
no http-notification <http-notification-name>
The following example displays an HTTP notification policy configured with a minimum interval of 5 minutes:
A:7750>config>app-assure>group# http-notification "in-browser-notification" create
A:7750>config>app-assure>group>http-notif# info
----------------------------------------------
description "In Browser Notification Example"
template 1
script-url "http://10.1.1.1/In-Browser-Notification/script.js"
interval 5
no shutdown
----------------------------------------------
The operator then needs to enable the http-match-all-req feature for any HTTP request sent the messaging server domain which will be used to monitor HTTP notification success/failures. This is done by creating a new application and enabling http-match-all-req within the app-filter.
A:7750>config>app-assure>group>policy# application "IBN Messaging Server" create
A:7750>config>app-assure>group>policy>app$ app-group "Web"
A:7750>config>app-assure>group>policy# app-filter entry 100 create
A:7750>config>app-assure>group>policy>app-filter>entry$ info
----------------------------------------------
expression 1 http-host eq "^10.1.1.1$"
http-match-all-req
application "IBN Messaging Server"
no shutdown
----------------------------------------------
The following examples displays the AQP entry required to match this policy based on an ASO characteristic:
A:7750>config>app-assure>group>policy>aqp# info
----------------------------------------------
entry 200 create
match
characteristic "in-browser-notification" eq "yes"
exit
action
http-notification "in-browser-notification"
exit
no shutdown
exit
----------------------------------------------
3.3.4. Configuring AA Volume Accounting and Statistics
A network operator can configure AA volume statistic collection and accounting on both AA ISA system and subscriber levels.
The following commands illustrate the configuration of statistics collection and accounting policy on an AA group/partition aggregate level (without subscriber context).
config>app-assure>group>statistics>app-group
accounting-policy act-policy-id
collect-stats
config>app-assure>group>statistics>application
accounting-policy act-policy-id
collect-stats
config>app-assure>group>statistics>protocol
accounting-policy act-policy-id
collect-stats
These commands illustrate the configuration of statistics collection and accounting policy for each AA subscriber in the system.
config>app-assure>group>statistics>aa-sub
accounting-policy acct-policy-id
aggregate-stats
app-group app-group-name export-using export-method [export-method...(upto 2 max)]
application application-name export-using export-method [export-method...(upto 2 max)]
charging-group charging-group-name export-using export-method [export-method...(upto 2 max)]
collect-stats
exclude-tcp-retrans
max-throughput-stats
protocol protocol-name export-using export-method
radius-accounting-policy rad-acct-plcy-name
These commands illustrate configuration of special study mode for a subset of AA subscribers (configured) to collect all protocol and/or application statistics with an AA subscriber context.
config>app-assure>group>statistics# aa-sub-study {application | protocol}
accounting-policy acct-policy-id
collect-stats
For details on accounting policy configuration (including among others AA record type selection and customized AA subscriber record configuration) refer to the 7450 ESS, 7750 SR, 7950 XRS, and VSR System Management Guide.
The following output illustrates per AA-subscriber statistics configuration that elects statistic collection for a small subset of all application groups, applications, protocols:
*A:ALU-40>config>app-assure>group>statistics>aa-sub# info
----------------------------------------------
accounting-policy 4
collect-stats
app-group "File Transfer"
app-group "Infrastructure"
app-group "Instant Messaging"
app-group "Local Content"
app-group "Mail"
app-group "MultiMedia"
app-group "Business_Critical
app-group "Peer to Peer"
app-group "Premium Partner"
app-group "Remote Connectivity"
app-group "Tunneling"
app-group "Unknown"
app-group "VoIP"
app-group "Web"
app-group "Intranet"
application "BitTorrent"
application "eLearning"
application "GRE"
application "H323"
application "TLS"
application "HTTP"
application "HTTPS"
application "HTTPS_Server"
application "HTTP_Audio"
application "HTTP_Video"
application "eMail_Business"
application "eMail_Other"
application "Oracle"
application "Skype"
application "SAP"
application "SIP"
application "SMTP"
application "SQL_Alltypes"
application "TFTP"
protocol "bittorrent"
protocol "dns"
protocol "sap"
protocol "skype"
----------------------------------------------
*A:ALU-40>config>app-assure>group>statistics>aa-sub#
3.3.4.1. Configuring Cflowd Collector
The following output displays an Application Assurance cflowd collector configuration example:
*A:ALA-48# configure application-assurance group 1 cflowd collector 192.168.131.149:55000 create
*A:ALA-48>config>app-assure>group>cflowd>collector$description
"cflowd_collector_NewYork"
*A:ALA-48>config>app-assure>group>cflowd>collector# no shutdown
*A:ALA-48>config>app-assure>group>cflowd>collector# exit
*A:ALA-48>config>app-assure>group>cflowd# info
----------------------------------------------
collector 192.168.131.149:55000 create
description "cflowd_collector_NewYork"
no shutdown
----------------------------------------------
*A:ALA-48>config>app-assure>group>cflowd#
3.3.4.2. Configuring AA Volume, TCP and RTP Performance Reporting
config>app-assure>group isa-aa-group-id
cflowd
collector ip-address[:port] [create]
no collector ip-address[:port]
description description-string
no description
[no] shutdown
rtp-performance
flow-rate sample-rate
no flow-rate
flow-rate2 sample-rate2
no flow-rate2
tcp-performance
flow-rate sample-rate
no flow-rate
flow-rate2 sample-rate2
no flow-rate2
template-retransmit seconds
no template-retransmit
[no] shutdown
volume
rate sample-rate
no rate
[no] shutdown
config>application-assurance
group isa-aa-group-id[:partition [create]]
no group isa-aa-group-id[:partition
cflowd
volume
[no] shutdown
rtp-performance
[no] app-group app-group-name [flow-rate | flow-rate 2]
[no] application application-name [flow-rate | flow-rate 2]
[no] shutdown
tcp-performance
[no] app-group app-group-name [flow-rate | flow-rate 2]
[no] application application-name [flow-rate | flow-rate 2]
[no] shutdown
The default is flow-rate.
The following example shows a configuration that:
Enables per-flow volume stats for group 1, partition 1 and configures sampling rate to 1/1000.
Enables per-flow TCP performance stats for web_traffic application within group 1, partition 1 and configures TCP sampling rate to 1/500.
Enables per-flow TCP performance stats for citrix_traffic application within group 1, partition 1 using TCP sampling rate2 to 1/100.
Enables per-flow RTP A/V performance stats for voip_traffic application within group 1, partition 1 and configures rtp sampling rate to 1/10.
*A:ALA-48# configure application-assurance group 1 cflowd
*A:ALA-48>config>app-assure>group>cflowd# volume rate 1000
*A:ALA-48>config>app-assure>group>cflowd# tcp-performance flow-rate 500
*A:ALA-48>config>app-assure>group>cflowd# tcp-performance flow-rate2 100
*A:ALA-48>config>app-assure>group>cflowd# rtp-performance flow-rate 10
*A:ALA-48>config>app-assure>group>cflowd# no shutdown
*A:ALA-48>config>app-assure>group>cflowd# info
----------------------------------------------
collector 192.168.131.149:55000 create
description "cflowd_collector_NewYork"
exit
volume
rate 1000
exit
tcp-performance
flow-rate 500
flow-rate 100
rtp-performance
flow-rate 10
exit
no shutdown
----------------------------------------------
*A:ALA-48>config>app-assure>group>cflowd#
*A:ALA-48# configure application-assurance group 1:1 cflowd
*A:ALA-48>config>app-assure>group>cflowd#
*A:ALA-48>config>app-assure>group>cflowd# volume no shutdown
*A:ALA-48>config>app-assure>group>cflowd# tcp-performance application "web_traffic"
*A:ALA-48>config>app-assure>group>cflowd# tcp-performance application "citrix" [flow-
rate2]
*A:ALA-48>config>app-assure>group>cflowd# tcp-performance no shutdown
*A:ALA-48>config>app-assure>group>cflowd# rtp-performance application "voip_traffic"
*A:ALA-48>config>app-assure>group>cflowd# rtp-performance no shutdown
*A:ALA-48>config>app-assure>group>cflowd# info
----------------------------------------------
volume
no shutdown exit
rtp-performance no shutdown
application "voip_traffic"
tcp-performance
no shutdown
application "web_traffic"
application “citrix” flow-rate2
exit