Fun and games with NAT

Discussion in 'Cisco' started by Guyster, Mar 19, 2007.

  1. Guyster

    Guyster Guest

    Afternoon all, I have a bit of a situation I have to deal with
    regarding an IP scheme migration, currently I have a number of sites
    which have been assigned address ranges within our network, initially
    they were unable to complete the migration from their old address
    ranges within the timescale required. They access our network via a
    Cisco 3750 switch connected to a PIX 515 running PIX 7.2. In order to
    allow them access in the short term their old IP addresses were NAT'ed
    to the new ones at the PIX (the vast majority of each range done
    dynamically but the top end of each sites range reserved for statics
    where necessary). They are now looking to migrate to the new IP scheme
    and need to do so in their own time, I am trying to come up with a way
    of doing this that I can put in place and then will not require any
    intervention on the Cisco devices as each site migrates. The network
    (with the exception of the NAT to allow for the old IP schemes) is a
    NAT 0 network - the no nat is configured using nat exemption. My
    problem is working out how to set the system up to facilitate these
    changes without breaking any of the static nat rules that are
    currently in place to allow traffic inbound. Any ideas would be much
    appreciated.
    Guyster, Mar 19, 2007
    #1
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