[184772] in North American Network Operators' Group
Re: ipv6 connectivity bugs
daemon@ATHENA.MIT.EDU (Mike)
Mon Oct 19 08:29:43 2015
X-Original-To: nanog@nanog.org
Date: Mon, 19 Oct 2015 05:29:07 -0700
From: Mike <mike-nanog@tiedyenetworks.com>
To: Dave Bell <me@geordish.org>
In-Reply-To: <CACXVQYAneDgK_v1fcuSbwA8QHCSOaKUPe2S3tLx9cX_f8JkLHg@mail.gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On 10/19/2015 04:46 AM, Dave Bell wrote:
> Do you have anything in the way of COPP on either box that may be
> dropping packets? I would imagine the issue is likely to be on the
> AS1k end.
>
> Additionally I see you have different interface speeds at each side.
> Is the thing in the middle at fault? ND is done using multicast.
>
> One final thing is attempt to ping across the link local addresses.
> Make you you set the source address correctly.
>
>
I am able to ping the link local address of the 'opposite end' from each
side, so it looks so me like that is working. I also notice, when I try
pinging the 7201 from the asr1000, during that time, the output of 'show
ipv6 neighbors" shows me this:
sh ipv6 neighbors
IPv6 Address Age Link-layer Addr State
Interface
FE80::xxxx:yyyy:FE2D:D190 6 xxxx.yyyy.d190 STALE
Gi0/0.110025
xxxx:yyyy::1:1 0 - INCMP
Gi0/0.110025
It looks to me like enough is 'working' that the asr1000 -> c7201
path is working, but not the other way around. And no, far as I know, I
have no copp or other filtering that would (to my knowledge) create a
one way situation. As far as the middle, I have ip/mpls that is bridging
my vlan25 across the network:
! ME3600x - Facing ASR1000
Interface TenGigabitEthernet0/1
switchport trunk allowed vlan none
switchport mode trunk
mtu 9216
service instance 25 ethernet
encapsulation dot1q 25
rewrite ingress tag pop 1
xconnect 10.0.15.3 2 encapsulation mpls
mtu 9216
!
! ME3600 - facing c7201
interface Vlan25
mtu 9216
no ip address
xconnect 10.0.15.2 2 encapsulation mpls
!
Do I need to make a special provision somewhere for multicast? This
seems pretty basic setup to me.
Mike-
