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Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
OL-16506-17
Chapter 5 Software Upgrade Processes Supported by Cisco ASR 1000 Series Routers
ISSU Upgrade for Redundant Platforms
ISSU Rollback Timer Overview
The Cisco ASR 1000 Series Router ISSU procedure has a rollback timer. Rollback timers are used for
for ISSU procedures on all Cisco routers that support ISSU, but this section will provide a brief overview
of ISSU rollback timers on the Cisco ASR 1000 Series Routers.
During ISSU, the rollback timer begins after the consolidated package or subpackage is loaded. If the
upgrade does not move forward in the amount of time specified in the rollback timer, the configuration
will automatically “roll back” to the previous configuration and the ISSU upgrade will be cancelled.
Upgrades using the issu command set and the request platform command set both have the rollback
timer option. The issu command set always uses a rollback timer; the request platform command set
does not use a rollback timer unless the auto-rollback option is used in the request platform software
package install command line.
For the issu command set, the issu acceptversion command can be entered to stop the rollback timer
without committing the upgrade during the ISSU upgrade. The issu commitversion command can be
entered to stop the rollback timer and commit the ISSU upgrade.
SIPSPA
7
No (SPAs in SIP do not forward
traffic during upgrade)
Yes (With MDR, traffic is
forwarded with minimal
interruption)
ELCBase
8
No (Built-in SPAs in an Ethernet
Line Card (ELC) do not forward
traffic during upgrade)
Yes (With MDR, traffic is
forwarded with minimal
interruption)
ELCSPA
9
No (Built-in SPAs in an ELC do
not forward traffic during
upgrade)
Yes (With MDR, traffic is
forwarded with minimal
interruption)
NIM SSD
10
No (NIM reload required)
NA
NGWIC T1E1
11
No (T1E1 do not forward traffic
during upgrade)
NA
1. Only supported if software redundancy is configured on the RP.
2. ESP has to reload to complete ESPBase subpackage upgrade. All router traffic will be lost during ESP upgrade.
3. An ESP switchover occurs as part of the upgrade, so traffic is forwarded with minimal interruption.
4. ESP has to reload to complete ESPBase subpackage upgrade. All router traffic will be lost during ESP upgrade and
ESPX86Base is not included in the RP1 bundle.
5. An ESP switchover occurs as part of the upgrade, so traffic is forwarded with minimal interruption.ESPX86Base is not
included in the RP1 bundle.
6. Any SIPBase upgrade will require the SPA interfaces to go down during the upgrade for all the SPAs in the SIP.
7. Any SIPSPA upgrade will require the SPA interfaces for that particular SPA to go down during the upgrade.
8. Any ELCBase upgrade will require the ELC interfaces to go down during the upgrade for all the SPAs in the SIP. ELCBase
is not included in the RP1 bundle
9. Any ELCSPA upgrade will require the ELC interfaces for that particular SPA to go down during the upgrade. ELCSPA is not
included in the RP1 bundle
10. NIM SSD is a built-in module available in ASR 1001-X platform. It is a slot for an extra harddisk, which helps increase the
memory.
11. NGWIC T1E1 is a built-in module available in ASR 1001-X platform, used for serial interface. Any NGWIC T1E1 upgrade
will require T1E1 interfaces for that particular SPA to go down during the upgrade.
Table 5-2 Limited Interruption Upgrade Compatibility Table (continued)
Subpackage Nonredundant RP and ESP Redundant RP and ESP