Cisco ASR 5500 User Manual

These features require an updated ICSR license to support the enhancements. Contact your Cisco account
representative for additional information.
Important
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 5500 System Administration Guide, StarOS Release 21.4
348
Interchassis Session Recovery
Configuring the Service Redundancy Protocol (SRP) Context

Cisco ASR 5500 Specifications

General

Brand	Cisco
Model	ASR 5500
Category	Network Router
Language	English