redundant supervisor interface connections

[cisco]

I have a  6509 with 2 sup720's configured with redundancy. I have not been able to find how the network interfaces on those two modules should be connected.

Do both modules just have the same connections? i.e. if port1 on sup720-1 is connected to the network then sup720-2 should have the same port on it connected to the same place?

Even though the modules are live and standby, I can still address each of the 4 interfaces separately no matter what the sup720 status is. So I'm confused because all 4 ports are live and configurable with 4 separate configurations at once.

Thanks,

Chuck

[nazimkha · Accepted solution]

Similar thread which may be helpful

https://community.cisco.com/t5/switching/cat-6500-with-dual-sup720-design/td-p/2490630

[cisco]

OK, That helps.

I only have one 6509 and it's the access layer distribution point. The sup720's connect to the core layer in a different part of the building via layer 3 and eigrp.

So I can just mirror the connection to the core but using different layer 3 IP's and the routing protocol will figure it out if one fails.

Thank you for pointing me to that. I was not able to find a search string to help me :-)

Chuck