IPv6 configuring Question

[OPEN]

I am trying to make tunnel with 3 routers in the middle.

There are Router 0 1 and 2, 1 and 2 are connected to 0 and try to make tunneling over it.
on router 1 there are 2 switches connected linearly  and at the end to that last switch there are 2 pc's.
on the other side, router 2, there is only one switch and pc is connected to switch.

Now here comes the problem, on router 2 side, I can ping from pc to router 2 in ipv6.

however on the otherse, router1, I cannot ping router 1 with pc it resulting timeout, I think there is some configuration missing on Switches but I have no idea which and how to figure this out.

[Harold Ritter]

Hi @OPEN ,

Can you please provide attach the .pkt file. You will need to zip it before you upload it..

Regards,

[OPEN]

I really would like to but this is my Uni assignment
and actually sending whole file to get the answer feels crossing the line
would there be any other way for me to give additional information?

[OPEN]

I think I can send the part that is just necessary for this question would be more ethic

[Harold Ritter · Accepted solution]

Hi @OPEN ,

The issue is that you configured IPv6 under the main interface (gi0/1). It needs to be configured under the sub interface (gi0/1.10), which handles traffic for Vlan 10.

Regards,

[OPEN]

So it is not really related to dualstack but the vlan itself did I undertand it correctly?

[Harold Ritter]

Correct. You need to place the ipv6 gateway address under the right sub interface, just like you did for ipv4, otherwise, it will not work.

Regards,

[OPEN]

Thank you very much but to finish this long question of mine, do I need to do configure both of the switches or can I just configure one of them? or is it supposed to be done on router?

[Harold Ritter]

You do not need to change anything on the switch. Just on the router (CUR_UNI.GW). You should then be able to ping from both PCs on the left end side to the router.

Regards,

[OPEN]

The reason Im asking this is because I cannot do sdm prefer dual-ipv4-and-ipv6 on switch which I dont know why.

[Harold Ritter]

This command does not appear to be supported on this specific switch. Any specific reason why you need this command? If you need to access or manage the switch using IPv6, you might want to consider using the 3560 or 3650 instead.

Regards,