Chapter 5 High Availability Overview - Cisco ASR1000-RP1 - ASR 1000 Series Route Processor 1 Router Software Configuration Manual

Hardware Redundancy Overview on the Cisco ASR 1000 Series Routers
•
•
Hardware redundancy on the Cisco ASR 1000 Series Routers gives users the following benefits:
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•
Hardware redundancy is available on the Cisco ASR 1006 Router only at this time.
provides a hardware redundancy overview.
Table 5-1 Hardware Redundancy Overview
Support for Dual
Hardware
Configuration on
Cisco ASR 1001
Hardware Router
Enhanced No
Services
Processor
Route Processor No
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
5-2
SPA interface processors (SIPs)—A SIP must be reloaded, and traffic briefly interrupted, for a SIP
upgrade to complete.
Shared port adapters (SPAs)—A SPA must be reloaded, which will briefly interrupt traffic to that
SPA, for a SPA software subpackage update to complete.
A failover option—If a processor fails, the standby processor immediately becomes the active
processor with little or no delay. The failover happens completely within the same router, so a
second standby router is not needed.
No downtime upgrades—Using features like ISSU, a software upgrade can be handled on the
standby processor while the active processor continues normal operation.
Support for Dual
Hardware
Configuration on
Cisco ASR 1002
Router
No
No
Support for Support for
Dual Hardware Dual Hardware
Configuration Configuration
on Cisco ASR on Cisco ASR
1004 Router 1006 Router
No Yes
No Yes
Chapter 5 High Availability Overview
Failover Behavior
If an active ESP experiences a
hardware or software event that
makes it unable to forward
traffic (such as a hardware
failure, an OIR, or a manual
switch) and a standby ESP is
configured, the standby ESP
becomes the active ESP with
the possibility of a minor
interruption (less than 200 ms).
If an active RP experiences an
event that makes it unable to
forward traffic (such as a
hardware failure, a software
failure, an OIR, or a manual
switch) and a standby RP is
configured, the standby RP
immediately becomes the active
RP.
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