ipv6 address on subinterfaces

[sachin30720041]

Hello,

R1's gig1 is connected with r2's gig1.

R1-------------R2

I have created subinterfaces on R1 and R2. and assigned IPv6 addresses to newly created subinterfaces.

R1

ipv6 unicast-routing

Router#show run int g1.2
interface GigabitEthernet1.2
encapsulation dot1Q 2
ipv6 address 2001::1/64
ipv6 enable
end

R2

ipv6 unicast-routing

interface GigabitEthernet1.2
encapsulation dot1Q 2
ipv6 address 2001::2/64
ipv6 enable
end

When I try to ping from R1's gig1.2 to R2's gig1.2 I get the following error.

R1#ping 2001::2 source gigabitEthernet 1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001::2, timeout is 2 seconds:
Packet sent with a source address of 2001::1
.H..H
Success rate is 0 percent (0/5)

Why ping is not working?

Thanks!

[Harold Ritter · Accepted solution]

Hi @sachin30720041 ,

I suppose this is on the CSR1000v, right?

If so, this is due to the different way this platform deals with dot1q traffic.

Try the following instead:

R1:

no interface GigabitEthernet1.2

interface GigabitEthernet1
no ip address
service instance 2 ethernet
encapsulation dot1q 2

!

bridge-domain 2
member GigabitEthernet1 service-instance 2

!

interface BDI2
encapsulation dot1Q 2
ipv6 address 2001::1/64
no shutdown

R2:

no interface GigabitEthernet1.2

interface GigabitEthernet1
no ip address
service instance 2 ethernet
encapsulation dot1q 2

!

bridge-domain 2
member GigabitEthernet1 service-instance 2

!

interface BDI2
encapsulation dot1Q 2
ipv6 address 2001::2/64
no shutdown

That should solve your issue.

Regards,

[Harold Ritter]

Hi @sachin30720041 ,

Did you get a chance to test the proposed solution?

Regards,

[sachin30720041]

Hi Harold,

With the above mentioned configuration ping is working.

Thanks,

Sachin