IPV 6 CISCO C 2960 CONFIGURATION ERROR

[adelboulares]

HELLO i work on paket-tracer lab and i want to configure the Catalyst 2960 switch and this command does not work 

Dir-Exam(config)#sdm prefer dual-ipv4-and-ipv6 default

i do my best and nothing change 

[balaji.bandi]

I am not a PT user but try below command :

sdm prefer dual-ipv4-and-ipv6 routing

[adelboulares]

Thank u but marker on dual not even in the default option 

[balaji.bandi]

not sure what PT version you using here video help you :

https://www.youtube.com/watch?v=dH6g7jHBCxI

[sfc9982]

Maybe the IOS version on Packet Tracer is older

I can issue the command successfully on my C2960

Cisco-Catalyst-2960(config)#sdm prefer dual-ipv4-and-ipv6 ?
  default  Default bias

If you just testing functions or re-produce some guide, you can just ignore it. When turn to phyical machine, it will be OK.

But if you are finishing homework or experiment, you can turn to GNS3. It support importing newer IOS image, and the sdm prefer dual-ipv4-and-ipv6 default command may be supported.

If this helps you, please choose this reply as "helpful".