Allow Non-Volte Traffic During Icsr Switchover - Cisco ASR 5000 Administration Manual

Configuring the Service Redundancy Protocol (SRP) Context
These features require an updated ICSR license to support the enhancements. Contact your Cisco account
Important
representative for additional information.

Allow Non-VoLTE Traffic During ICSR Switchover

The ICSR framework reduces switchover disruption for VoLTE traffic by enabling VoLTE traffic on the
newly active gateway prior to reconciling the billing information and enabling communication with the newly
active gateway when accounting is not deemed critical.
This functionality extends to all other traffic, including data sessions and default bearer traffic for IMS/e911,
The following ICSR functionality is provided for all non-VoLTE data traffic:
• When a switchover occurs, the newly active gateway forwards all traffic the moment the gateway becomes
active.
• External communication with billing servers is deferred. See the traffic flow diagram below.
ASR 5000 System Administration Guide, StarOS Release 21.1
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Interchassis Session Recovery