Sup 720 failover

[mohammedrafiq]

Hi,

We have installed 2 SUP 720 into 6509 switch and would like to change default failover time to reduce delay.What is the config we need on sup 720?

Regards.

[Wilson Samuel · Accepted solution]

Hi,

In general Sup 720s can be used in two modes:

1. SSO

2. RPR

1. In SSO mode the L-2 traffic is never interrupted even if the active Sup fails, however if you want the L-3 traffic also to flow un interrupted, then one must enable NSF along with the SSO

2. RPR, all the traffic will get dropped and then with in a minute's time the Stdby Sup becomes active and all the ACL are reprogrammed.

Not sure if I got your question correctly, however I presume this should answer your concern.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/nsfsso.html#wp1119694

Regards

Sam Wilson