[168990] in North American Network Operators' Group
Re: SIP on FTTH systems
daemon@ATHENA.MIT.EDU (Mark Tinka)
Sat Feb 8 01:42:49 2014
From: Mark Tinka <mark.tinka@seacom.mu>
To: Anders =?iso-8859-1?q?L=F6winger?= <anders@abundo.se>
Date: Sat, 8 Feb 2014 08:42:22 +0200
In-Reply-To: <52F59973.3030801@abundo.se>
Cc: nanog@nanog.org
Reply-To: mark.tinka@seacom.mu
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
--nextPart1439485.VW0C1shQPY
Content-Type: Text/Plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
On Saturday, February 08, 2014 04:41:55 AM Anders L=F6winger=20
wrote:
> So, as I wrote to Mikael, don't you need to use proxy-ARP
> or proxy-ND to get devices in same L2 domain to be able
> to communicate? They are on same subnet so they will
> ARP/ND for each other.
No, you don't, and you don't want to either.
You customers will have visibility to one another at Layer 2=20
if you don't enable Split Horizon, MAC-FF, Private VLAN's,=20
or whatever implementation your favorite vendor uses to=20
prevent inter-communication between customers in a shared=20
VLAN at the AN/bridge level.
While it seems sensible, it normally isn't a good idea. The=20
majority of what will take place between customers at Layer=20
2 is dirt. Best to run them through a Layer 3 device=20
upstream and apply appropriate filtering.
> There is no rocket science here. Scripting in
> routers/switches seems to be more common, Cisco has TCL
> and some Nexus and Arista boxes do Python.
>=20
> There is only some hooks into the control/forwarding
> plane needed to do advanced services in access.
> Forwarding plane is covered mostly by SDN so half the
> work is done.
>=20
> In a 24/48 port access switch there are few clients, so
> scripting performance is not a problem.
I'm more impressed by the braveness of this implementation,=20
than the actual implementation itself, I mean.
In our case, given the number of customers in question that=20
would terminate on a BNG (be it a small switch or big=20
router), long term control plane performance is a huge=20
concern, as well as how the hardware handles Multicast and=20
other corner-case services in various topologies.
Mark.
--nextPart1439485.VW0C1shQPY
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.16 (GNU/Linux)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=xvPR
-----END PGP SIGNATURE-----
--nextPart1439485.VW0C1shQPY--
