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Community Member

Upgrading FWSMs in Failover Pair

Due to bug, we are upgrading our Dual Chassis FWSM Failover pair from 1.1.2 to 1.1.4. I want to minimize downtime, can anyone point me to some documentation or briefly explain the best process. From 2.2 documentation it appears I can upgrade between maintenance release while maintaining failover capabilities, was this the case with 1.1? Or is the "Replacement of Failover Unit after Hardware Failure" the best process to failover eventhough one unit has not failed?

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Accepted Solutions

Re: Upgrading FWSMs in Failover Pair

The doc in FWSM 2.2 for the faulty module replacement can serve as guideline.

http://www.cisco.com/en/US/partner/products/hw/modules/ps2706/products_tech_note09186a0080531753.shtml

But as stated in FWSM FAQ -failover for ver 1.1 (http://www.cisco.com/en/US/partner/products/hw/modules/ps2706/products_qanda_item0900aecd800fa578.shtml), this might be your case. FWSM running ver2.2 provide more flexibility and minimize downtime with the 'online upgrade' features. This feature is not available in code 1.1.x.

Therefore, when performing the upgrade. rebooting both FWSM modules are inevitable, but at least with a very minimum downtime (time taken for the module to get online and working).

What you can do is to 'break' the standby FWSM from the failover process, and perform the upgrade. Repeat the same process for both blades. See attachment for details instruction.

HTH

AK

2 REPLIES

Re: Upgrading FWSMs in Failover Pair

The doc in FWSM 2.2 for the faulty module replacement can serve as guideline.

http://www.cisco.com/en/US/partner/products/hw/modules/ps2706/products_tech_note09186a0080531753.shtml

But as stated in FWSM FAQ -failover for ver 1.1 (http://www.cisco.com/en/US/partner/products/hw/modules/ps2706/products_qanda_item0900aecd800fa578.shtml), this might be your case. FWSM running ver2.2 provide more flexibility and minimize downtime with the 'online upgrade' features. This feature is not available in code 1.1.x.

Therefore, when performing the upgrade. rebooting both FWSM modules are inevitable, but at least with a very minimum downtime (time taken for the module to get online and working).

What you can do is to 'break' the standby FWSM from the failover process, and perform the upgrade. Repeat the same process for both blades. See attachment for details instruction.

HTH

AK

Community Member

Re: Upgrading FWSMs in Failover Pair

AK,

Thank you. You were right, the downtime was just minimized to the time it took for the fwsm module to reset (which is very quick).

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