Extendable Option in IP NAT. Please Help!

Discussion in 'Cisco' started by friesen.sv, Jun 25, 2013.

  1. friesen.sv

    friesen.sv Guest

    Hallo, i can not understand, what meanthe option "extendable" in the config:

    ip nat inside source static tcp 5101 5101 extendable
    ip nat inside source static tcp 5102 5102 extendable

    The extendable keyword allows the user to configure several ambiguous static translations, where an ambiguous translations are translations with the same local or global address.
    ip nat inside source static <localaddr> <globaladdr> extendable

    Do i have the option "extendable" because of 2 static nat policies with the same global address ( ?

    Thank You!
    friesen.sv, Jun 25, 2013
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  2. If you look at the "show ip nat translations" command you'll see the
    output is a table with a bunch of fields per translation.

    An extended translation is one where all the columns are filled in so
    we have enough information to tell which translation a particular packet

    Not all entries are extended so it's possible that one entry can match
    several different connections if you will.

    That's my understanding. Extendable is just a way to tell NAT to
    remember as much as possible about a translation.
    Martin Gallagher, Jun 26, 2013
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  3. friesen.sv

    friesen.sv Guest

    Am Mittwoch, 26. Juni 2013 10:40:41 UTC+2 schrieb Martin Gallagher:
    Thank You!
    friesen.sv, Jun 26, 2013
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