Large scale NAT device selection

[Adel3]

Hi all 

I'm looking for a Cisco device in order to have large scale NAT (CGN).

Anyone can advise me how to select suitable device (hardware) either any calculator application which can show what hardware would be suit.

I've about 1Tbps traffic and about 100K online user.

Also I've to keep NAT logs on a server (Syslog)

[balaji.bandi]

Are you Looking FW or Routers here :

Q. How many concurrent NAT sessions are supported in Cisco IOS NAT?

A. The NAT session limit is bounded by the amount of available DRAM in the router. Each NAT translation consumes about 312 bytes in DRAM. As a result, 10,000 translations (more than would generally be handled on a single router) consume about 3 MB. Therefore, typical routing hardware has more than enough memory to support thousands of NAT translations.

https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/26704-nat-faq-00.html

[Adel3]

Thankyou Balaji

Do you know how I can monitor the amount of RAM which are used by NAT (The command that shows memory usage by NAT I mean)

[balaji.bandi]

I general Monitor before and After NAT Enable :

#show platform resources

[Adel3]

May I use "clear ip nat translation *  "    ??

[balaji.bandi]

that is to clear NAT, yes you can do that.

[Adel3]

I did but nothing changed before and after doing this command.

Amount of memory was fixed !!!