8600 8691SSF and 8692SSF ver 5.1.1 /5.1.2

[Larryski]

I have a pair of 8600 with dual 8691SSF and 8692SSF which need to be configured for IST / SMLT cluster
The Current version Ver 4.1.4 is not preferable for the new design and there is a request to upgrade
to ver 5.1.1 or ver 5.1.2.
I am concerned if the SSF mismatch will result in a performance or reliability issue.
Ver 4.1.8 has been recommend, is this a preferable software version.

Many Thanks

Larry_s

[paulypaul]

that is a tricky problem. at my old job we had a similar problem.

with most 4.1.X releases we had HA problems, and ended up running all our cores on a single SF. it was more stable than running with two SF in HA mode.

as for your mis matched SF's, I don't see a problem. as long as they are running the same code. in that case I would would run 4182.

another options.
if the two core 8610s are in a full  ist/smlt redundant environment I would remove the 8691's and divide up your 8692's for your two 8610's. upgrade them to the latest v5.  then talk to finance and order two more 8692's, you can just add the stand by SF after the fact.

 

[Michael McNamara]

I thought this thread looked familiar;

http://forums.networkinfrastructure.info/nortel-ethernet-switching/8600-ist-between-8691sf-8692sf-managed-chassis/

Cheers!