4500-x vss

[Network Pro]

i am running 4500-x in vss mode. I have set of stackable upstream switches (2960s) that does not support epagp. I cant use fast hello because my ios on 4500x does not support it and dont want to upgrade it. i dont want to use pagp and terminate all links on 1  access switch.

i was wondering if this will work ?

on 4500x i have configured

switch virtual domain 10
 switch mode virtual
 switch 1 priority 110
 mac-address use-virtual
!
 dual-active detection pagp trust channel-group 100
 

interface Port-channel100
 description Test
 switchport
 switchport mode trunk
 

interface TenGigabitEthernet1/1/1
 switchport mode trunk
 channel-protocol lacp
 channel-group 100 mode active
 

interface TenGigabitEthernet2/1/1
 switchport mode trunk
 channel-protocol lacp
 channel-group 100 mode active
 

Upstream access switches (2960s)

int port-channel 1

switchport mode trunk
spanning-tree guard loop

interface GigabitEthernet1/0/1
 switchport mode trunk
 spanning-tree guard loop
 channel-protocol lacp
 channel-group 1 mode active
end
 

interface GigabitEthernet1/0/2
  switchport mode trunk
 spanning-tree guard loop
 channel-protocol lacp
 channel-group 1 mode active
end
 

[InayathUlla Sharieff]

Below link is similar to your issue:

https://supportforums.cisco.com/discussion/12254161/port-channel-2960-stack-4500x-vss-stack

If that doesnt help we can provide some more details to you.

HTH

[Network Pro]

the above link states about using etherchannel for ip phone. i want to know between 2960s access switches and 4500x cani use LACP? if so what will be the redudancy mechanism ? can dual-active detection pagp trust channel-group 100 be used failover

[InayathUlla Sharieff]

Netpro,

you had the same discussion earlier;

https://csc-test1.cisco.com/discussion/12246891/cisco-4500x-vss-mec

Did this not help I see almost all the option listed there for you.

[Network Pro]

yes thats correct but i am not sure if the failover is working correctly. hence i have attached teh config above. do you think this is going to work ?

running

dual-active trust detection pagp port-channel xx

and using lacp on port-channel that connect to 2960s switches ?

I read somewhere trust pagp and using lacp wont work ? please let me know what you thoughts are ?

[Network Pro]

any thoughts please ?