[c-nsp] Building E-Trees

[Pshem Kowalczyk]

Hi,

I think that might help, but I need to figure out a way for the packets to
not be flooded to other PWE3. according to the docs:
http://www.cisco.com/en/US/docs/routers/asr9000/software/mpls/configuration/guide/gcasr9kvpls.html#wp1171784

*"Note *Split horizon groups are not supported for access PWs."

I'll try to test that. Alternatively I'll try to see if I can move the
neighbour statement to a vfi (and build a fake static VPLS).

I actually wonder if there is any difference between having the neighbours
directly under the bridge domain vs having a VFI under the bridge domain
and neighbours under the VFI.

kind regards
Pshem


On Tue, 17 Jan 2017 at 23:39 <adamv0025 at netconsultings.com> wrote:

> Hi Pshem,
>
> > Pshem Kowalczyk
> > Sent: Monday, January 16, 2017 9:25 PM
> >
> > Hi,
> >
> > We have a setup that currently uses a local bridge domain on asr9k, one
> local
> > physical interface and a number of P2P PWE3 that terminate on PWHE on
> > other asr9ks. The setup is used for broadband termination. The P2P PWE3
> go
> > to BNGs.
> > The main reason for using a bridge domain with multiple PWE3 so we can
> > load-balance the subscribers among larger number of BNGs but also to
> > provide more graceful fail-over to what can be achieved  with a backup
> > PWE3.
> >
> > Currently the bridge domain learns MAC addresses, but as the number of
> > subscriber grows that's likely to become a limiting factor.  In reality
> we
> need
> > something like an e-tree where the BNGs are the leafs and the physical
> > interface is the root but with limited MAC address learning. In fact what
> all
> > we need is one MAC address per BNG plus a 'default route' that points to
> the
> > physical interface.  Is there a way to define something like that?
> >
>
> Have you considered disabling mac learning on the BD and defining mac
> addresses of BNGs and GW statically please?
>
> RP/0/RP0/CPU0:router(config-l2vpn-bg)# bridge-domain bar
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd)# mac
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd-mac)# learning disable
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd-vfi)# neighbor 10.1.1.2 pw-id 1000
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd-vfi-pw)# static-mac-address 1.1.1
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd)# interface GigabitEthernet 0/1/0/0
> RP/0/RP0/CPU0:router(config-l2vpn-bg-bd-ac)# static-mac-address 2.2.2
>
> adam
>
> netconsultings.com
> ::carrier-class solutions for the telecommunications industry::
>
>