ICND2 - Troubleshooting Etherchannel

Node ManNode Man Member Posts: 668 ■■■□□□□□□□
in CCNA & CCENT
Hi Everybody,
I hope you are having a nice day. Question: can you offer any pointers for troubleshooting etherchannel? Im stuck. One 2950 says 'not connect' the other says 'err-disable'. I try shut/no shut, but the 2950 quickly goes back to err-disable. Any advice would be appreciated.

Thanks
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  • lsud00dlsud00d Member Posts: 1,571
    What do you see when you do
    sh etherchannel summary
    sh etherchannel (group number) detail
    ?
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  • FloOzFloOz Member Posts: 1,614 ■■■■□□□□□□
    Are both sides using the same protocol? lacp/pagp/on? My recommendation is to set your links to "channel-group # mode active" across the board
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  • mikeybinecmikeybinec Member Posts: 484 ■■■□□□□□□□
    FloOz wrote: »
    Are both sides using the same protocol? lacp/pagp/on? My recommendation is to set your links to "channel-group # mode active" across the board

    Or, channel-group mode on icon_cheers.gif
    Cisco NetAcad Cuyamaca College
    A.S. LAN Management 2010 Grossmont College
    B.S. I.T. Management 2013 National University
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  • OfWolfAndManOfWolfAndMan Member Posts: 923 ■■■■□□□□□□
    Basically what everyone is saying is show the configs for all four ports.
    :study:Reading: Lab Books, Ansible Documentation, Python Cookbook 2018 Goals: More Ansible/Python work for Automation, IPSpace Automation Course [X], Build Jenkins Framework for Network Automation []
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  • lsud00dlsud00d Member Posts: 1,571
    mikeybinec wrote: »
    Or, channel-group mode on icon_cheers.gif

    I vote LACP! That's how I team my server NIC's icon_wink.gif
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  • theodoxatheodoxa Member Posts: 1,340 ■■■■□□□□□□
    I once had one side saying "not-connect" and it turned out that the other end didn't have a channel-protocol configured. Could've sworn I'd set it to PAgP, but once I configured the channel-protocol it came up.
    R&S: CCENT → CCNA → CCNP → CCIE [ ]
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  • Node ManNode Man Member Posts: 668 ■■■□□□□□□□
    Thanks for the advice everyone. The solution was to shut and no-shut Port-Channel 1.
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