This feature supports configurable inclusion of counters for an ESM host (UE) in triggered interim updates, because of mobility, generated from WLAN-GW. Triggered interim updates provide a way for RADIUS to learn of the current location of the UE (such as AP MAC).
The feature also supports a configurable hold down time to protect against very frequent mobility events. The CPM must communicate with the IOM for each mobility event to obtain the counters. By default, when inclusion of counters is enabled, no hold-down time is imposed on mobility triggered interim updates. If a hold down time is configured, the first mobility event triggers an interim update with counters included and start the hold down timer. If the hold down timer has not expired, interim updates because of a mobility event are not sent.
The inclusion of counters and hold down time are applicable to all access-types (soft-GRE, soft-L2TPv3, L2-AP, SAP, PW-SAP, and so on), and for DHCP, data-triggered, and EAP authentication or re-authentication triggered mobility.
The configuration for counter inclusion subject to optional hold down time is only applicable to ESM. For counters to be included in the mobility-triggered interim updates, the general std-acct-attributes or detailed-acct-attributes in the include-attribute in the radius-accounting-policy must also be enabled. With DSM, counters are always included in mobility-triggered interim updates if the isa-radius-policy has inclusion for either or both frame-counters or octet-counters enabled. Unlike ESM, no new WLAN-GW-specific configuration is required for the counter inclusion.
The feature is supported at the maximum ESM host scale.
config>router>wlan-gw>mobility-triggered-acct>
interim-update
interim-update include-counters [hold-down <seconds>]
no interim-update
<include-counters> : keyword
<seconds> : [60..86400]