CSM: config-sync damages FT configuration

[grischast]

Dear all

Two 6503 with Sup720 and CSM (WS-X6066-SLB-APC) are configured for active/standby-failover with HSRP-group-tracking. Vlan20 is the client vlan with HSRP on the router-side:

Router1# sh run int vlan20

interface Vlan20

description MSFC-CSM-link

ip address 10.0.0.2 255.255.255.248

standby 2 ip 10.0.0.1

standby 2 preempt

standby 2 name MSFC-CSM-link

Router1# sh run mod 2

module ContentSwitchingModule 2

ft group 1 vlan 5

  priority 100 alt 50

  preempt

  track group MSFC-CSM-link

  track mode any

!

vlan 20 client

  description MSFC-CSM-link

  ip address 10.0.0.3 255.255.255.248 alt 10.0.0.5 255.255.255.248

  gateway 10.0.0.1

  alias 10.0.0.6 255.255.255.248

Router2# sh run int vlan20

interface Vlan20

description MSFC-CSM-link

ip address 10.0.0.4 255.255.255.248

standby 2 ip 10.0.0.1

standby 2 priority 50

standby 2 preempt

standby 2 name MSFC-CSM-link

Router2# sh run mod 2

module ContentSwitchingModule 2

ft group 1 vlan 5

  priority 50 alt 100

  preempt

  track group MSFC-CSM-link

  track mode any

!

vlan 20 client

  description MSFC-CSM-link

  ip address 10.0.0.5 255.255.255.248 alt 10.0.0.3 255.255.255.248

  gateway 10.0.0.1

  alias 10.0.0.6 255.255.255.248

Whenever I perform

hw-module csm 2 standby config-sync

on the active chassis I get this:

Jul  7 10:18:16.415 MEST: %CSM_SLB-6-REDUNDANCY_INFO: Module 2 FT info: Active: Bulk sync started

Jul  7 10:18:16.423 MEST: %CSM_SLB-6-REDUNDANCY_INFO: Module 2 FT info: Active: Sending configurations to Standby CSM, this may take several minutes!

Jul  7 10:18:20.667 MEST: %CSM_SLB-6-REDUNDANCY_INFO: Module 2 FT info: Active: Manual bulk sync completed

Jul  7 10:18:20.667 MEST: %CSM_SLB-4-REDUNDANCY_WARN: Module 2 FT warning: Config Sync does not save Standby running-config to startup-config

Jul  7 10:18:20.875 MEST: %CSM_SLB-4-REDUNDANCY_WARN: Module 2 FT warning: FT configuration might be out of sync.

And the reason for the two CSMs being out of sync is that the line

track group MSFC-CSM-link

is gone from the FT group on the standby CSM:

Router2# sh run mod 2

module ContentSwitchingModule 2

ft group 1 vlan 5

  priority 50 alt 100

  preempt

  track mode any

If I add the missing line manually to the FT group on the standby CSM the two CSMs come back into sync after a couple of seconds:

Jul  7 10:20:18.876 MEST: %CSM_SLB-4-REDUNDANCY_WARN: Module 2 FT warning: FT configuration back in sync

This behaviour is 100% reproducable every time I perform a config synchronization. The CSM Software is version

4.3(5) on both modules.

Any clue how to get rid of this annoying problem?

Thanks for any hint and best regards,

Grischa

[litrenta]

This is because track group is configured wrong and it is getting checked on sync but not when entered (probably need to tighten up parser. instead of

track group MSFC-CSM-link

should be

track group 2

group should be hsrp group number not description of hsrp group .

see:

http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/csm/4.2.x/configuration/guide/redun.html#wp1047936

[grischast]

Hi litrenta

Thanks for your reply. Unfortunately this is not the solution. I have tried "track group 2" (although Cisco IOS suggests not to do so) and this is the result:

Router1(config)#module ContentSwitchingModule 2

Router1(config-module-csm)# ft group 1 vlan 5

Router1(config-slb-ft)#no track group MSFC-CSM-link

Router1(config-slb-ft)#track group ?

  WORD  hsrp group name

Router1(config-slb-ft)#track group 2

% Please consider switching to HSRP group name instead of group number (track group 2)

Nevertheless I have configured it with group number instead of group name on both CSMs. BUT then according to "sh mod csm 2 ft detail" the tracked group 2 stays in state "init" without becoming active or standby on either side.

AND guess what? After config-sync the line "track group 2" vanished on standby CSM exactly like the one with the group name before.

So, no solution yet.

Further suggestions appreciated,

Grischa