several nat overload

Discussion in 'Cisco' started by Dmitry Melekhov, Sep 4, 2009.

  1. Hello!

    I want to have two nat overload

    Gi 0/0 is internal interface with nat inside
    Gi 0/0.5 is external with nat outside

    There is rule:

    ip nat inside source list 2 interface GigabitEthernet0/0.5 overload

    If I try
    ip nat inside source list 2 interface GigabitEthernet0/0.8 overload

    I get

    %Dynamic mapping in use, cannot change

    If I add
    ip nat inside source list 3 interface GigabitEthernet0/0.8 overload

    and add ip nat outside on Gi 0/0.8
    then there is no translations in
    sh ip nat translations

    Is it possible to solve this problem?
    Dmitry Melekhov, Sep 4, 2009
    #1
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  2. Dmitry Melekhov

    Juki Guest

    Dmitry Melekhov kirjoitti:
    > Hello!
    >
    > I want to have two nat overload
    >
    > Gi 0/0 is internal interface with nat inside
    > Gi 0/0.5 is external with nat outside
    >
    > There is rule:
    >
    > ip nat inside source list 2 interface GigabitEthernet0/0.5 overload
    >
    > If I try
    > ip nat inside source list 2 interface GigabitEthernet0/0.8 overload
    >
    > I get
    >
    > %Dynamic mapping in use, cannot change
    >
    > If I add
    > ip nat inside source list 3 interface GigabitEthernet0/0.8 overload
    >
    > and add ip nat outside on Gi 0/0.8
    > then there is no translations in
    > sh ip nat translations
    >
    > Is it possible to solve this problem?
    >

    Hi there

    Maybe you should use route-maps instead of access-lists.
    Then it is possible to have several outside interfaces.
    Check
    http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ftnatrt.html#wp1024922

    //Juki
    Juki, Sep 4, 2009
    #2
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