Configuring NAT on Cisco 2500 series router

I´m not having access to nat commands on cisco IOS. Every time I tryied i go ^ at nat command.
ip nat inside
    ^

Here is my sh ver :
Cisco Internetwork Operating System Software
IOS (tm) 3000 Software (IGS-INR-L), Version 11.0(13), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1996 by cisco Systems, Inc.
Compiled Mon 09-Dec-96 20:35 by athavale
Image text-base: 0x03029060, data-base: 0x00001000

ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
ROM: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (f
c1)

SBARTR2514 uptime is 5 minutes
System restarted by reload
System image file is "flash:igs-inr-l.110-13.bin", booted via flash

cisco 2500 (68030) processor (revision D) with 8192K/2048K bytes of memory.
Processor board ID 03004269, with hardware revision 00000000
Bridging software.
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
2 Ethernet/IEEE 802.3 interfaces.
2 Serial network interfaces.
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read ONLY)

Configuration register is 0x2102
Jose BredariolPMPAsked:
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that1guy15Commented:
Looks like NAT was not supported on Cisco routers until 11.2 and you must have the PLUS image to support NAT.
My suggestion would be to upgrade your IOS to a current version :) 11.0 is way out of date and I would suggest upgrading to at least 12.2
Here is the link that i found this from
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item09186a00800e523b.shtml#qa3 
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Don JohnstonInstructorCommented:
You'll also need to upgrade your RAM and Flash to 10MB and 16MB respectively.
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Jose BredariolPMPAuthor Commented:
thanks
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