cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

3590
Views
15
Helpful
4
Replies
Highlighted
Beginner

Understanding the Extendable Option in IP NAT

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


ip nat inside source static tcp 192.1.1.15 5101 172.30.30.1 5101 extendable

ip nat inside source static tcp 192.1.1.10 5102 172.30.30.1 5102 extendable



www.cisco.com:

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 (172.30.30.1) ?


Thank  You!

Everyone's tags (1)
4 REPLIES 4
Advisor

Understanding the Extendable Option in IP NAT

Hi,

you don't need it here as you have 2 different ports for each translation.

It should be used if you had two links on which you were doing the same static PAT like this for example:

ip nat inside source static tcp 192.1.15 5101 172.30.30.1 5101 extendable

ip nat inside source static tcp 192.1.15 5101 172.30.30.2 5101 extendable

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.
Beginner

Understanding the Extendable Option in IP NAT

Hallo Alain,

thank you for your Answer!

But i configured on Packet Tracer 2 NAT Policies with the same static PAT:

ip nat inside source static tcp 10.10.10.10  5101  11.11.11.1 5101

ip nat inside source static tcp 10.10.10.15  5101 11.11.11.1 5101

Packet Tracer don't show, that is wrong.

sh run show:

ip nat inside source static tcp 10.10.10.10  5101  11.11.11.1 5101

ip nat inside source static tcp 10.10.10.15  5101  11.11.11.1 5101

Is it Bug of  Packet Tracer?


Advisor

Understanding the Extendable Option in IP NAT

Hi,

PT is not a real platform and the extendable keyword is not available.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.
Beginner

I know this is over a year

I know this is over a year old now.. but you need to clear your translations.. "clear ip nat trans * " then re-test

CreatePlease to create content
Content for Community-Ad
July's Community Spotlight Awards