CSM-BridgeMode redundancy... Help

Unanswered Question
Sep 3rd, 2008

I have been looking for a configuration example of CSM redundancy using two 6500 with a single CSM each in bridge mode.

I already have one CSM working in one of the 6500s, I'm planning to install the second CSM to provide redundancy.

Let's say that I'm using the following configuration in my working CSM:

module ContentSwitchingModule 3

vlan 210 client

ip address 192.168.223.131 255.255.255.192

gateway 192.168.223.129

!

vlan 323 server

ip address 192.168.223.131 255.255.255.192

!

serverfarm FTPFARM

nat server

no nat client

real 192.168.223.141

inservice

real 192.168.223.142

inservice

!

serverfarm HTTPSFARM

nat server

no nat client

real 192.168.223.136

inservice

real 192.168.223.137

inservice

!

vserver FTPVIP

virtual 192.168.223.140 tcp ftp

serverfarm FTPFARM

persistent rebalance

inservice

!

vserver HTTPSVIP

virtual 192.168.223.135 tcp https

serverfarm HTTPSFARM

persistent rebalance

inservice

!

vserver HTTPVIP

virtual 192.168.223.145 tcp www

serverfarm HTTPSFARM

persistent rebalance

inservice

!

What would I need to do in order to make it work in redundant mode with the other CSM?

I have this problem too.
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Syed Iftekhar Ahmed Thu, 09/04/2008 - 04:27

You will need to add IPs for the CSM peer on current CSM. The current config will

be something like this (where x1 & x2 are the IP addr of the secondary CSM)

for e.g.

module ContentSwitchingModule 3

vlan 210 client

ip address 192.168.223.131 255.255.255.192 alt 192.168.223.x1

gateway 192.168.223.129

!

vlan 323 server

ip address 192.168.223.131 255.255.255.192 alt 192.168.223.x2

Then you need to configure a FT VLAN on MSFC (both chasis).For E.g if 900 is the FT VLAN then

your FT config will be some thing like this

ft group 1 vlan 900

priority 20 alt 15

heartbeat-time 1

failover 3

preempt

ON secondary CSM just put these lines and the config will be syncronized

module ContentSwitchingModule 3

vlan 210 client

ip address 192.168.223.x1 255.255.255.192 alt 192.168.223.131

gateway 192.168.223.129

!

vlan 323 server

ip address 192.168.223.x2 255.255.255.192 alt 192.168.223.131

ft group 1 vlan 900

priority 15 alt 20

heartbeat-time 1

failover 3

preempt

For details

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/csm/4.2.x/configuration/guide/redun.html

Syed

javiercastro Thu, 09/04/2008 - 06:43

Eventhough it is bridge mode the IP addresses for the second CSM should be different (x1 & x2)?

I have only seen examples in routed mode and there it makes sense that those IP addresses are different.

Have you ever configured something like this?

Syed Iftekhar Ahmed Thu, 09/04/2008 - 08:16

Redundancy is the same in router mode vs. bridge mode: you cannot configure the same IP address for the CSM management IP's on the 2 CSM's.Each CSM in a redundant pair independently keeps track of the availabilty/health of the Servers using probes.

Syed

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