Cisco destination NAT

Discussion in 'Software' started by smart1n, Oct 1, 2014.

  1. smart1n


    Oct 1, 2014
    Likes Received:

    I am having a problem getting my head around destination NAT..

    Problem I have is that I need to NAT all requests from specific IP's going to destination IP to another IP in our VM environment on This is to assist in the migration of service from 1 server to another.

    so was thinking I need an ACL to sort the traffic out, and a destination NAT to change the destination IP so that all requests go to the modified one. only problem being, that I cant do static NAT based on destination...

    So, do I need to reverse the process as such so that my inside interface becomes the outside and vice versa?


    IP nat outside source (outside int being the one with the new VM host in it)

    access-list 100 permit IP host (where f,g,h,i are specific individual hosts)
    access-list 100 permit ip host
    access-list 100 permit IP host
    access-list 100 permit ip host

    int gi1/0/1 (where this int is the DG for the VM environment where the new host IP resides)
    ip add$
    ip nat outside

    int gi1/0/6
    ip add$
    ip nat inside (where this is our old host, which we need to keep active until all hosts are migrated over)

    route-map NAT permit 10
    match ip address 100

    smart1n, Oct 1, 2014
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