[c-nsp] asr9k forwarding between pw's in a bridge-domain

[Aaron]

I think this explains it...

By default, split horizon is enabled for pseudowires under the same VFI.
However, in the default configuration, split horizon is not enabled on the
attachment circuits (interfaces or pseudowires).

http://www.cisco.com/en/US/partner/docs/routers/asr9000/software/asr9k_r4.2/
lxvpn/configuration/guide/lesc42p2mps.html#wp1247198

To have split horizon so that traffic from one pw is not forwarded to the
other you would need to configure a vfi and put both pw under the VFI.

You can also configure split horizon groups.

Aaron

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Aaron
Sent: Wednesday, September 26, 2012 9:43 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] asr9k forwarding between pw's in a bridge-domain

i'm seeing devices downstream on these 2 pw's seeing each others' stp conf
bpdus's....since one of the devices is locking in on the other as root
bridge. I thought pw's didn't allow for certain types of forwarding between
them by default....recall something related to shg's (split horizon groups
default behavious on pw's)

please explain.



Aaron


RP/0/RSP0/CPU0:sabn-9k#sh run l2vpn br gr local Wed Sep 26 09:19:36.520 CDT
l2vpn bridge group local bridge-domain local neighbor 10.101.36.2 pw-id
10000 !
neighbor 10.101.36.3 pw-id 10000
!
routed interface BVI5
!
!
!

RP/0/RSP0/CPU0:sabn-9k#sh ver | in IOS
Wed Sep 26 09:19:44.007 CDT
Cisco IOS XR Software, Version 4.1.2[Default] RP/0/RSP0/CPU0:sabn-9k#sh inst
summ Wed Sep 26 09:19:50.151 CDT Active Packages:
disk0:asr9k-mini-p-4.1.2
disk0:asr9k-doc-p-4.1.2
disk0:asr9k-k9sec-p-4.1.2
disk0:asr9k-mpls-p-4.1.2
disk0:asr9k-mgbl-p-4.1.2

 

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