Last week at a customer site we installed a 2nd 2960s 24 port switch to form a stack using flexstack cables, and the switch stack is working as expected as I can see a master switch and 2nd switch as a member.
For redundancy / resilience we decided to use port 24 on each switch over copper for trunk uplinks to our core switch. The issue that we're having is I can't ping the switch management address. I can however see the address in the arp table and the edge switch is visible when I run show cdp nei. As a work around I've shutdown one of the ports to the downlink from core to edge in order to ping the management address of the switch which is in vlan 1. I'd like to get the port-channel working on both sides for resilience.
ANY HELP IS APPRECIATED...
Core switch is a WS-C3750G-24TS-1U running software version C3750 Boot Loader (C3750-HBOOT-M) Version 12.2(25r)SEE4, C3750 Software (C3750-IPBASE-M)
Edge switch is a WS-C2960S-24TS-L running software version C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(53r)SE,C2960S Software (C2960S-UNIVERSALK9-M)
The config on the edge switch which goes to the core is :
interface GigabitEthernet1/0/24 description ***** switchport mode trunk channel-group 6 mode on end
interface GigabitEthernet2/0/24 description ***** switchport mode trunk channel-group 6 mode on end
interface Port-channel6 description ****** switchport mode trunk end
The config on the downlink ports from the core to the edge:
interface GigabitEthernet1/0/20 description Edge switchport trunk encapsulation dot1q switchport mode trunk channel-group 20 mode on end
interface GigabitEthernet2/0/20 description Edge switchport trunk encapsulation dot1q switchport mode trunk shutdown channel-group 20 mode on end
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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