Configuring an AA ISA group

About this task

This section describes how to enable AA on the router.

Procedure

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.
Perform the following optional steps:
1. Enable group policy partitioning.
2. Configure capacity cost threshold values.
3. Configure the number of transit prefix IP policies.
4. Configure IOM egress queues to the MS-ISA.
5. Enable overload cut through and configure the high and low watermarks values.
6. Configure performance statistics accounting.

Example: AA ISA group configuration

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 the AA ISA group configuration context:

config>isa>application-assurance-group isa-aa-group-id [create] [aa-sub-scale sub-scale] 
backup mda-id
description description
divert-fc fc-name
no fail-to-open
http-enrich-max-pkt size-in-octets
isa-capacity-cost-high-threshold threshold
isa-capacity-cost-low-threshold threshold
isa-overload-cut-through
partitions
minimum-isa-generation min-isa-generation
overload-sub-quarantine
  [no] shutdown
partitions
primary mda-id
qos
  egress
    from-subscriber
      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
      wa-shared-high-wmark percent
      wa-shared-low-wmark percent
   to-subscriber
     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
     wa-shared-high-wmark percent
     wa-shared-low-wmark percent
shared-resources
  tcp-adv-func size
[no] shutdown
statistics
  performance
    accounting-policy acct-policy-id
    collect-stats
transit-prefix-ipv4-entries entries
transit-prefix-ipv4-remote-entries entries
transit-prefix-ipv6-entries entries
transit-prefix-ipv6-remote-entries entries

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#