9300 Switch Vlan having auto ipv6 configuration

[syed ethesham ul Hussain]

Greetings,

I have two 9300 switches in stack. When trying to create a vlan. IPv6 commands are added automatically to the interface.

I have tried removing the commands manually but they are not getting removed. ipv6 address dhcp,ipv6 address autoconfig reappears back.

When i removed the switches from stack both of them are working fine.

Could this be a bug.

interface Vlan200
description *** M-VLAN ***
ip address x.x.x.x 255.255.255.0
ipv6 address dhcp
ipv6 address autoconfig
ipv6 enable
ipv6 dhcp client request vendor
end

Kindly advise. 

Syed

[marce1000 · Accepted solution]

  - On Vlan200-interface  running configuration try : no ipv6 enable
     you may need  to the shutdown the vlan200-interface and no shutdown afterwards (too).
     You may can also use the no ipv6 unicast-routing global configuration command (e.g)

  M.

[syed ethesham ul Hussain · Accepted solution]

Dear Marce,

Thanks for your reply. As i have tried no for all the ipv6 commands but as soon as after removing it i check sh run it re-appears.

Any how i will try this : to shutdown the interface and remove it and no shut the interface and check.

Kind Regards,

[MHM Cisco World · Accepted solution]

 ipv6 unicast-routing <<- this must disable ipv6 in SW

Did you try it ?

MHM

[Deepak Kumar · Accepted solution]

Hi, 

To disable IPv6 processing on an interface that has not been explicitly configured with an IPv6 address, use the "no ipv6 enable" interface configuration command. To globally disable IPv6 routing, use the "no ipv6 unicast-routing" global configuration command.

So in your case, you can use "no ipv6 unicast-routing" command under global configuration mode. 

Regards, Deepak Kumar

[syed ethesham ul Hussain]

Dear Deepak,MHM,Marce,

Thanks for your reponse. I believe no ipv6 unicast-routing should resolve my issue. I will try this once i will be on the site. As it is a remote site. 

Appreciate your support.