how to enable ip v6 for 3750/3560 switch?

[Gongyuan Yao]

Hello,

We have 3750G and 3650G with IOS rel 12.2(50)SE3. According to Cisco document, these switches should support IP v4 and v6 dual-stack configuration (after 12.2SE). I have searched many Cisco IP v6 online help, but can not figure out how to enable this feature. Such as, I tried to configure an interface with IP v6 addr, but it will not take "ip v6" or "ipv6".  Any help would be great appreciated.

Thanks.

gy

[Reza Sharifi]

Hi,

Did you turn on "ipv6 routing" first?

[Gongyuan Yao]

Thanks.

It does not take the "ipv6 routing" cmd.

See the screen capture:

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
*    1 28    WS-C3560G-24TS     12.2(50)SE3           C3560-IPBASEK9-M

Configuration register is 0xF

Switch#ipv?
% Unrecognized command
Switch#ip?
ip

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#ip?
ip

Switch(config)#ip

Thanks.

gy

[cadet alain · Accepted solution]

Hi,

For IPv6 support you must enable the correct sdm template

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_see/configuration/guide/swsdm.html

Regards.

Alain.

[andtoth · Accepted solution]

Hi,

First, you will need to change the SDM template to dual-ipv4-and-ipv6 with the sdm prefer dual-ipv4-and-ipv6 global configuration command. Please note that you will need to reload the switch in order for this change to take effect.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_50_se/configuration/guide/swsdm.html

Then you will need to enable IPv6 Routing with the ipv6 unicast-routing global configuration command.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_50_se/configuration/guide/swipv6.html

Best regards,

Andras

[Gongyuan Yao]

Thanks a lot for all of you people's help.

It works.

gy