Hi all,

Hoping someone can test this for me, I believe there is a severe bug with IPv6 
on the ASR.

We are unable to stand up IPv6 in the following scenario:

ASR - Gi0/0/0 connected to a trunk port on a Catalyst, and another trunk port 
connected to Gi0/0 on an ISR2911

If you configure the following on the ASR:

interface GigabitEthernet0/0/0.4010
 encapsulation dot1Q 4010
 ip address 192.168.1.1 255.255.255.0
 ipv6 address FDC3:76E6:F4EF:2A24::2/64
 ipv6 enable
end

The configure the following on the 2911 (or any ISR with IPv6 support):

interface GigabitEthernet0/0.4010
 encapsulation dot1Q 4010
 ip address 192.168.1.2 255.255.255.0
 ipv6 address FDC3:76E6:F4EF:2A24::1/64
 ipv6 enable
end

On the Catalyst set the ports your Gi0/0/0 and Gi0/0 are connected to to trunk 
mode and allow all VLAN's.

ISR#ping FDC3:76E6:F4EF:2A24::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FDC3:76E6:F4EF:2A24::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms

ISR1#ping FDC3:76E6:F4EF:2A24::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FDC3:76E6:F4EF:2A24::2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

So we confirm the router can ping itself (so IPv6 is enabled), but it can't 
ping the other end of the link.  Nothing in neighbours either.

ASR#ping FDC3:76E6:F4EF:2A24::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FDC3:76E6:F4EF:2A24::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

ASR#ping FDC3:76E6:F4EF:2A24::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FDC3:76E6:F4EF:2A24::1, timeout is 2 seconds:
.H..H
Success rate is 0 percent (0/5)

Ditto on the ASR.

Two ISR's work fine.

Code I'm using:

ASR: asr1001-universalk9.03.07.00b.S.152-4.S0b.bin
ISR: c2900-universalk9-mz.SPA.152-1.T1.bin

I've had a case open with TAC for 7 days now and they still can't resolve it...

Hopefully someone has some spare kit to test this on.

-Scott
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