asr1004 for nat

[julxu]

Hi

I have ASR1004, and it will be border router, I want put nat for subnet 10.0.0.0/12 on it, current the box has only one link to it has no big load. if I add nat on, please advice, does it possible cause load problem? or other problems?

Another basic question, just want confirm, I want nat 10.0.0.0/12 to one ip address, is it ok? and the 10.0.0.0/12 will includes subnets 10.0.?.0/24, if so, how can I trace all the histories, just log to local server? please advice.    

Any comments will be appreciated

Thanks in advance

Julxu           

[Lei Tian · Accepted solution]

Hi,

The performance is based on the ESP. ESP 2.5 is the lowest can give you 2.5 Gbps NAT throughput.

You can config NAT /12 to one IP. As long as you don't have 60k concurrent sessions, it will be fine.

HTH,
Lei Tian

Sent from Cisco Technical Support iPhone App

[julxu]

Lei

Thanks for reply.

I have module AS1000-ESP20, and ios version 15.3(3)S, I guess it is ok.

you said, I can nat subnet /12  to one ip, as long as concurrent sessions less than 60K. can I understand it as if I have more than that amount, I still can use nat, just give more than one ip address, am I right?

Please advice

Julxu

[Lei Tian · Accepted solution]

Hi Julxu,

The NAT throughput is 20G for ESP20. Yes, if you have more sessions, you need more IP.

HTH,

Lei Tian