Redundancy modes on MSFCs

[beckerola]

Hi

According to your experience, which mode is better to configure in a MSFC, DRM or SRM?

SRM saves IP addresses and you only have to worry about the active device (the other in standby), but reading some Cisco documentation, it seems more slow to converge when the active MSFC fails because it has to learn all the routing table from scratch.

[andrew.butterworth]

You are obviously using Hybrid software on your 6500 (CatOS on the supervisor and IOS on the MSFC). You are probably better looking at converting your Supervisors to run Native IOS and then running SSO and RPR+ or NSF (if you have the right hardware). Hybrid development seems to be slowing down and the rapid failover features (SSO, RPR+ & NSF) are only available when using Native IOS.

HTH

Andy

[devang_etcom]

hi,

as per your IOS mode: native or hybrid... you can go for RPR or RPR+...

RPR+ is the best one for the redundancy...

as it detects failover earlier than RPR...and many more

regards

Devang

[beckerola]

SSO would be the best option here, and in fact, we have it configured in one of our data centers. The bad news is that on the other data centers we don't have this possibility so we need to choose between DRM and SRM. Seeing how SRM works it would be better to leave the central Catalyst like they are right now, with DRM.