Cisco ASR1002-10G-VPN/K9 Software Guide - Page 65

Chapter 4 Software Upgrade Process ISSU Upgrade for Redundant Platforms Table 4-2 Limited Interruption Upgrade Compatibility Table SubPackage Nonredundant RP and ESP Redundant RP and ESP Consolidated package (any) No (Reload required) Yes (RP switchover) RPBase No (RP Reload required) Yes (RP switchover) RPControl Yes (in-service) Yes (in-service) RPAccess RPIOS ESPBase SIPBase4 SIPSPA5 Yes (in-service) Yes1 (IOS software switchover) No2 (ESP reload required) Yes (in-service) Yes (RP switchover) Yes3 (via ESP switchover) No (SPAs in SIP do not forward No (SPAs in SIP do not forward traffic during upgrade) traffic during upgrade) No (SPAs in SIP do not forward No (SPAs in SIP do not forward traffic during upgrade) traffic during upgrade) 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. Any SIPBase upgrade will require the SPA interfaces to go down during the upgrade for all the SPAs in the SIP. 5. Any SIPSPA upgrade will require the SPA interfaces for that particular SPA to go down during the upgrade. 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. For the request platform command set, the request platform software package install rp slot commit command must be entered to stop the rollback timer only in cases where the auto-rollback option is used. The rollback timer for the issu command set can be configured by entering the issu set rollback-timer command. The rollback timer when used with the request platform command set is specified when you use the auto-rollback option when entering the issu request platform software package install command. For ISSU upgrades on Cisco ASR 1000 Series Routers, it may be advisable to set long rollback times when the upgrade is being performed on routers with large configurations. The amount of time left on the rollback timer during an ISSU upgrade can be checked by entering the show issu rollback-timer command. OL-16506-10 Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide 4-3