Turns out the 'previous administration' had set up a mirror on port 21 which cause a looping havoc when I connected 21 to 21 using the PortChannel. It should work now. One last question I had included "switchport mode access" in my configuration jon.marshall said I didn't need that unless I was trunking Vlans, I'm not so should I leave "switchport mode access" of of the configuration?
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I want to run 2 cables between 2 identical Cisco Catalyst 2960G-24TC-L switches and configure them both active. So I figure I need to create a PortChannel between them. Do I need to establish the PortChannel/channel group on BOTH switches or just ONE (and the other switch passively 'receives' the Portchannel?) Or do I set up both sides the same. I ask, because when I did this, clients lost connection to our webservices (although my telnet connections to BOTH switches persisted), and I don't understand why. PRIMARY SWITCH (connected to firewall)...SECONDARY SWITCH (connected to Primary switch) interface Port-channel6 interface Port-channel6 description PC2SN2 description PC2SN1 (SN=ServiceNet) switchport mode access switchport mode access ! interface GigabitEthernet0/21 interface GigabitEthernet0/21 description PC2SN2 description PC2SN1 channel-group 6 mode active channel-group 6 mode active ! interface GigabitEthernet0/24 interface GigabitEthernet0/24 description PC2SN2 description PC2SN1 channel-group 6 mode active channel-group 6 mode active Of all the examples listed on the Cisco site there is no example of a simple same switch connection like this (everything else, but)
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