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Duplicate Etherchannel Issue

Can someone explaing why do we see duplicate etherchannel forming ?

In the below output  Po32A and Po33A

GRVSERVNEWCS8#show etherchannel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator

        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port

        w - waiting to be aggregated
Number of channel-groups in use: 5
Number of aggregators:           7

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
30     Po30(SD)         -
32     Po32(SU)        LACP      Gi6/39(P)      Gi6/40(P)      Gi8/22(P)
32     Po32A(SU)       LACP      Gi6/43(P)
33     Po33(SU)        LACP      Gi6/42(P)
33     Po33A(SU)       LACP      Gi8/24(P)
34     Po34(SU)        LACP      Gi6/41(P)      Gi8/26(P)
50     Po50(SU)         -        Gi6/47(P)      Gi6/48(P)      Gi7/47(P)
                                 Gi7/48(P)

Regards Vinayak
3 REPLIES

Duplicate Etherchannel Issue

Vinayak,

These ports are called Aggregator ports Po32A(SU) and are put in a Suspended state

It's because Port-channel noticed difference in configuration and was not able to  bundle ports together. Secondary aggregator Po32A will keep the port up  but will work as a separate port, like you did not have port-channel at  all. What are these ports connected to?

Please see below link for some more info on aggregartor ports

http://www.cisco.com/en/US/tech/tk389/tk213/technologies_configuration_example09186a0080094470.shtml#po1a

HTH

Kishore

New Member

Duplicate Etherchannel Issue

It is connected to IBM Servers...New P770 IBM servers..

I do not notice any immediate mismatch in the configs

It is connected to IBM Servers...New P770 IBM servers..

I do not notice any immediate mismatch in the configs

Regards Vinayak

Duplicate Etherchannel Issue

it could be at the other end . your IBM servers could be playing mischief

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