C4507 Sup7-E redundancy - supervisor uplinks???

[wintermute000]

Hey guys


In a single Cisco 4507 chassis with redundant Sup7-E supervisors


According to the link below, if you run in redundant mode, only the first 2 uplinks (out of 4) on each supervisor may be used.


http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-8-0E/15-24E/configuration/guide/xe-380-configuration/RPR_XE.html
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/Borderless_Campus_Network_1-0/Borderless_Campus_1-0_Design_Guide/BN_Campus_Technologies.html#wp1228027


I'm having a hard time clarifying: does this mean that all 4 ports are passing traffic? Does anyone know whether you can form a port-channel between say port 1 sup1 + port 1 sup2?
Or does this mean that port 1 sup1 is active and port1 sup2 is a standby (like a firewall HA). With ports 3 and 4 being unusable.


Haven't played with the traditional big campus switches for awhile!

[icecream-guy]

the redundant supervisors, at least for the Sup720 in a 6500, are not active/active. they are passing state table information to each other in case of failure but standby is not processing packets.  may be the same for the 7E in the 4507.

[wintermute000]

If you checkout the links it just says active on both supervisors for the 7E....

[Otanx]

I think what you are asking is the interfaces on the sup cards are active? The way I read it, you can use the first two interfaces on both sup cards. The last two on each are shutoff. So you could do a port channel with Te5/1, Te5/2, Te6/1, Te6/2, but you could not use /3 or /4 interfaces on either card. See figure two here - http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-4500-series-switches/data_sheet_c78-612364.html

This would make sense as you don't want all your uplinks on a single sup that then fails.

-Otanx

[wintermute000]

yeah that's what I think i.e. I can use the first 2 ports on both supervisors, even the redundant supervisor, all act as 'active' ports.

Obviously if i lose a sup then its ports fails.