Software Assurance Features - Cisco ASR 5000 series Product Overview

▀ Service Availability Features
Hardware Action Taken
Failure Scenario
Unplanned Tasks are restarted on
processing card standby processing card.
failure, no Network connection is
Session maintained on existing LC
Recovery via RCC.
Unplanned Sessions are recovered on
processing card the standby processing
failure, with card. Network connection
Session is maintained on existing
Recovery LC via RCC
Unplanned LC Standby LC becomes
failure active if installed in 1:1
redundant configuration.
Unplanned LC With LC port redundancy
port failure enabled, standby port is
enabled.
1. This does not apply to for deployments containing only 1 active processing card.
Important:
loss of fully established HA subscriber sessions. This feature does, however, require a minimum processing card
configuration per chassis of three active cards and two standby to prevent all data loss and session recovery.
Important:
automatically begins providing service. However, once the failed card's error condition is corrected (by replacement or
configuration change), there is no automatic return of control to the repaired processing or line card. This migration
must occur through manual intervention by a system administrative user.

Software Assurance Features

Numerous features are built into the system software to ensure the continuation of service in the case of software
process failures. SMC software controls the management contexts and overall system control, while processing card
software controls the PPP sessions, AAA, and VPN processes.
The following table shows various software process failure situations involving the SMC and SPIO cards, provides
impact analysis (if any), and explains how each situation is resolved using rapid failure detection techniques found in
the system.
▄ Cisco ASR 5000 Series Product Overview
Effect on
Accounting Data
AAA Acct_Stop
record is
generated for all
sessions in the
affected
subgroup
No impact (less
interim update
interval)
No impact (less
update interval)
No impact
If the session recovery feature is enabled, then a processing card hardware failure will not cause any
When a processing or line card failover occurs, the redundant component (when installed)
Effect on Effect on the flow
User of Data Packets
Sessions
Sessions lost Lost only for the
on affected effected sessions
processing
card only
No impact < 5 sec. interrupt
No impact < 1 sec. interrupt
No impact < 1 sec. interrupt
Redundancy and Availability Features
Effect on Control
Transactions
< 5 sec. interrupt until
new A11/GTP-C
manager is available
(new sessions
only)NOTE: Applies
only when A11/GTP-C
manager is on failed
card
< 5 sec. interrupt (new
sessions only)
< 1 sec. interrupt
< 1 sec. interrupt
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