Configuring Cisco for LACP and Trunking?

Discussion in 'Cisco' started by Usenet, Apr 4, 2008.

  1. Usenet

    Usenet Guest

    We're trying to configure our Cisco 4507 to allow a new Dell server with
    a pair of Broadcom Gig NIC's to aggregate its NIC's to give us a 2gbps

    So far we seem to have got the team and LACP up and enabled, but the
    adaptor that the Broadcom Admin Util creates for the team is only
    showing a 1gbps connection where I would have expected it to show as

    The individual NICs show as connected at 1gbps.

    We're not Cisco experts so are struggling on how to get the 2 NICs to

    This is what I think the relevent output from "sho conf" is, more
    available if needed.

    On the server side we've done nothing in the Broadcom drivers other than
    create a team using 802.3ad Link Aggregation using LACP.

    version 12.2
    boot system flash bootflash:cat4000-i9s-mz.122-18.EW1.bin
    interface Port-channel2
    description "Main Server link"
    switchport mode access
    interface GigabitEthernet4/4
    switchport mode access
    spanning-tree portfast
    channel-group 2 mode active
    channel-protocol lacp
    interface GigabitEthernet4/20
    switchport mode access
    spanning-tree portfast
    channel-group 2 mode active
    channel-protocol lacp

    Any help would be appreciated
    Usenet, Apr 4, 2008
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  2. Hi,

    Forget about it ...

    first: you connect your 2 NICs to the same switch, and what goes wrong when
    this switch blows ?. if you want redundancy connect to two different
    second: I would be greatly surprised if you are even close at utilizing ONE
    gigabit NIC ! so why you want two, when you can't use one ?!
    What you should go for is redundancy/resilient links, hence you should
    configure failover as an active/standby senarium. sometimecalled adapter
    fault tolerance or network fault tolerance.
    Allthough I think it's different in the broadcom chips/util'

    Martin Bilgrav
    Martin Bilgrav, Apr 7, 2008
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