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Multiple interfaces in same subnet - AIX

Hi all, I am new to AIX systems and having problems configuring 2 interfaces on the same subnet.Is it possible in AIX. If not ,does anyone know of any reaons? I am using AIX 5.1. To describe the problem :Everything works fine till only one interface is UP but when the second interface comes up I cannot ping any of the machines in the same subnet and neither other machines can ping mine.Things come back to normal the moment I 'detach' the 2nd interface.Is this an issue with routing ? Is there any work around? Thanks , Sandeep...

  1. #1

    Default Multiple interfaces in same subnet

    Hi all,
    I am new to AIX systems and having problems configuring 2 interfaces
    on the same subnet.Is it possible in AIX. If not ,does anyone know of
    any reaons?
    I am using AIX 5.1.

    To describe the problem :Everything works fine till only one interface
    is UP but when the second interface comes up I cannot ping any of the
    machines in the same subnet and neither other machines can ping
    mine.Things come back to normal the moment I 'detach' the 2nd
    interface.Is this an issue with routing ? Is there any work around?

    Thanks ,
    Sandeep
    Sandeep Guest

  2. #2

    Default Re: Multiple interfaces in same subnet

    Thanks for the reply,
    But, I kind of 'need' to use two/more different interfaces active in
    the same subnet.It is to support failover capabilities between them.
    Can I configure them in the same subnet at the same time?

    Thanks again ,
    Sandeep



    [email]gatealcus9k[/email] (gatealcus9k) wrote in message news:<23e94730.0307232355.94811cfposting.google.c om>...
    > You can use option alias in ifconfig command:
    > if u have one ethernet interface in en0.
    > ex.
    > ifconfig en0 192.168.0.1 255.255.255.0 up
    > and another ip u can set is
    >
    > ifconfig en0 192.168.0.2 255.255.255.0 alias up
    >
    > check is up
    >
    > ifconfig -a
    >
    >
    > bye,
    > :)
    Sandeep Guest

  3. #3

    Default Re: Multiple interfaces in same subnet

    [email]sandeep_group_google[/email] (Sandeep) wrote in message news:<f514501f.0307240938.4f6da076posting.google. com>...
    > Thanks for the reply,
    > But, I kind of 'need' to use two/more different interfaces active in
    > the same subnet.It is to support failover capabilities between them.
    > Can I configure them in the same subnet at the same time?
    >
    > Thanks again ,
    > Sandeep
    >
    Hi Sandeep,

    you can have several network adapters configured to the same subnet.
    However, you cannot control, which interface AIX will use to reach
    other hosts via this subnet. E.g. even in spite of a route setting the
    pakets might travel through the other adapter (which is found before
    the one with the route set).
    As you appear to be interested in network adapter failover
    capabilities: did you try to configure an etherchannel? That's exactly
    what an etherchannel can do. You need a network switch that supports
    etherchannel, though.

    Regards,
    Andreas
    Andreas Schulze Guest

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