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IPv6 NAT command not working on Cisco 1941 ISR

Level 1
Level 1

Dear All,


I am using a Cisco 1941 router with IPbase image .I am not able to configure NAT-PT on this router.

when I type ipv6 i am not able to see the nat command after that.

Do I need to do something different.

ANy suggestion here will be helpful.

EnstageTESTBED#sh ver
Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.2(4)M6a, RELEASE SOFTWARE (fc1)
Technical Support:
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Tue 15-Apr-14 03:31 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)

EnstageTESTBED uptime is 3 days, 23 hours, 20 minutes
System returned to ROM by power-on
System image file is "flash0:c1900-universalk9-mz.SPA.152-4.M6a.bin"
Last reload type: Normal Reload
Last reload reason: power-on


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

Cisco CISCO1941/K9 (revision 1.0) with 491520K/32768K bytes of memory.
Processor board ID FGL183923D1
2 Gigabit Ethernet interfaces
1 terminal line
DRAM configuration is 64 bits wide with parity disabled.
255K bytes of non-volatile configuration memory.
255488K bytes of ATA System CompactFlash 0 (Read/Write)

License Info:

License UDI:

Device#   PID                   SN
*0        CISCO1941/K9          FGL183923D1


Technology Package License Information for Module:'c1900'

Technology    Technology-package           Technology-package
              Current       Type           Next reboot
ipbase        ipbasek9      Permanent      ipbasek9
security      None          None           None
data          None          None           None

Configuration register is 0x2102



Loganathan .K

5 Replies 5

Mark Jensen
Level 1
Level 1

NAT was introduced in order to keep the IPv4 going, IPv6 needs no NAT.


a good read.

Dear Mark,


Thanks for your reply.

I understand that ipv6 was introduced to keep ipv4 going.


But in the current scenario I am having a ipv6 and ipv4 client in my setup and I want to have inter communication between them using nat-pt.


SO how can I achieve this.

Have the exact same issue, is it license or version?

Version 15.0(1r)M9


Raju Sekharan
Cisco Employee
Cisco Employee

Hi Loganathan


Try enabling Data + security license




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