Configuring A Hitless Upgrade - Cisco catalyst 6500 series Configuration Note

Chapter 7 Configuring Redundant Connections
Command
Step 4
Router(config-slb-vserver)#
virtual ip-address [ ip-mask ]
protocol port-number [service
ftp]
Step 5
Router(config-slb-vserver)#
serverfarm serverfarm-name
Step 6
Router(config-slb-vserver)#
sticky duration [group
group-id ] [netmask
ip-netmask ]
Step 7
Router(config-slb-vserver)#
replicate csrp sticky
Step 8
Router(config-slb-vserver)#
replicate csrp connection
Step 9
Router(config-slb-vserver)#
inservice
Step 10
Router(config-module-csm)#
group group-id vlan vlanid
Step 11
Router(config-slb-ft)#
priority value
Step 12
Router(config-slb-ft)#
failover failover-time
Step 13
Router(config-slb-ft)#
preempt
This example shows how to set fault tolerance for connection redundancy:
Router(config-module-csm)# vserver VS_LINUX-TELNET
Router(config-slb-vserver)# virtual 10.6.0.100 tcp telnet
Router(config-slb-vserver)# serverfarm SF_NONAT
Router(config-slb-vserver)# sticky 100 group 35
Router(config-slb-vserver)# replicate csrp sticky
Router(config-slb-vserver)# replicate csrp connection
Router(config-slb-vserver)# inservice
Router(config-slb-vserver)# exit
Router(config-module-csm)# ft group 90 vlan 111
Router(config-slb-ft)# priority 10
Router(config-slb-ft)# failover 3
Router(config-slb-ft)# preempt
Router(config-slb-ft)# exit

Configuring a Hitless Upgrade

A hitless upgrade allows you to upgrade to a new version without any major service disruption due to
the downtime for the upgrade. To configure a hitless upgrade, perform these steps:
Step 1 If you have preempt enabled, turn it off.
Perform a write memory on standby.
Step 2
Upgrade the standby system with the new release, and then reboot the CSM.
Step 3
OL-4612-01
Purpose
Configures the virtual server attributes.
Associates a server farm with a virtual server.
Ensures that connections from the same client use the same real
server.
Enables sticky replication.
Enables connection replication.
Enables the virtual server for load balancing.
ft
Configures fault tolerance and enters the fault-tolerance
submode.
Sets the priority of the CSM.
Sets the time for a standby CSM to wait before becoming an
active CSM.
Allows a higher priority CSM to take control of a fault-tolerant
group when it comes online.
Catalyst 6500 Series Content Switching Module Configuration Note
Configuring a Hitless Upgrade
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