Cisco 4700M Administration Manual page 272

Performing Software Upgrades and Downgrades
Enter the show ft group detail command in Exec mode to verify the state of each appliance. Upgrade
Step 10
the ACE that has its Admin context in the STANDBY_HOT state (ACE-2) first by entering the reload
command in Exec mode. After A CE-2 boots up, it maytake a few minutes to reach theSTANDBY_HOT
state again. Configuration synchronization is still enabled and the connections through ACE-1 are still
being replicated to ACE-2.
During the upgrading and downgrading of the ACE software, the ACE uses the STANDBY_WARM and
WARM_COMPATIBLE redundancy states to handle any CLI incompatibility issue between peers. For
information about redundancy states, see
Note
Note
ACE-2/Admin# reload
This command will reboot the system
Save configurations for all the contexts. Save? [yes/no]: [yes]
Disable preemption on ACE-1.
Step 11
ACE-1/Admin# config
ACE-1/Admin(config)# ft group 1
ACE-1/Admin(config-ft-group)# no preempt
Press Ctrl-z to return to Exec mode.
Perform a graceful failover of all contexts from ACE-1 to ACE-2 by entering the ft switchover all
Step 12
command in Exec mode on ACE-1. ACE-2 becomes the new active ACE and assumes mastership of all
active connections with no interruption to existing connections.
ACE-1/Admin# ft switchover all
Upgrade ACE-1 by reloading it and verify that ACE-1 enters the STANDBY_HOT state (may take
Step 13
several minutes) by entering the show ft group detail command in Exec mode.
Because the standby ACE has changed its state to either STANDBY_COLD or STANDBY_HOT,
the configuration mode is enabled. The configuration is synchronized from ACE -2 (currently
active) to ACE-1.
ACE-1/Admin# reload
This command will reboot the system
Save configurations for all the contexts. Save? [yes/no]: [yes]
Reenable preempt for the FT group on the active ACE (ACE-2). If ACE-1 is configured with a higher
Step 14
priority and preempt is configured on the FT group, ACE-1 reasserts mastership after it has received all
configuration and state information from ACE-2, making ACE-2 the new standby. ACE-1 becomes the
active ACE once again.
Enter the show ft group detail command to verify that ACE-1 is in the ACTIVE state and ACE-2 is in
Step 15
the STANDBY_HOT state.
Cisco 4700 Series Application Control Engine Appliance Administration Guide
A-6
Do not add any more commands to the ACE-1 configuration. At this point in the upgrade
procedure, any incremental commands that you add to the ACE-1 configuration may not be
properly synchronized to the ACE-2 configuration.
If you upgrade from A1(7a) or A1(7b) to A3(1.0), you will see that the ACE enters the
STANDBY_HOT state. However, if you upgrade from A1(8.0) or A1(8.0a) to A3(1.0), you will
see that the ACE enters the STANDBY_WARM state.
Appendix A Upgrading or Downgrading Your ACE Software
Chapter 6, Configuring Redundant ACEs.
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