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  1. #1
    Join Date
    Jul 2010
    Costa Rica

    Default Help with NAT overload (PAT)

    Dear Collegues:

    As a practice I have created a topology in which I am trying to run NAT from RA. The purpose is to translate subnet IPs and into the serial 0/3/0 ip address into the serial 0/3/0 IP which is When I ping host AP (ip address from host PC Call Center 2 (ip address it is 100 % reachable. When I check the translations in RA I see that the translation is fine:

    RA#show ip nat translation
    Pro Inside global Inside local Outside local Outside global
    icmp 7
    icmp 8

    However when I check the statistics it shows me the following results:

    RA# sho ip nat statistics
    Total translations: 51 (0 static, 51 dynamic, 51 extended)
    Outside Interfaces: Serial0/3/0
    Inside Interfaces: FastEthernet0/0.2 , FastEthernet0/0.3
    Hits: 2513 Misses: 3355
    Expired translations: 3271
    Dynamic mappings:

    And the counter of hits , misses and expired translations they are increasing progresively with every packet I sent from the source to the destination. My questions:

    1) Is my NAT properly configured ?
    2) Does anyone knows the posibles causes of why the expiration translation counter might increase in a router ?

    Here I show my nat configuration:

    ip nat inside source list 1 interface Serial0/3/0 overload
    access-list 1 permit
    access-list 1 permit
    interface Serial0/3/0
    ip address
    ip nat outside
    interface FastEthernet0/0.2
    encapsulation dot1Q 2
    ip address
    ip nat inside
    interface FastEthernet0/0.3
    encapsulation dot1Q 3
    ip address
    ip nat inside

    For further information feel free to check the attached PKA file.

    Greetings and thanks ,
    Attached Files Attached Files

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