From: Andrew Lissitz \(alissitz\) (alissitz@cisco.com)
Date: Sat Nov 19 2005 - 00:35:16 GMT-3
Hello Folk,
Just a little curious as I have seen MPLS being used between PE and
CE... This seems to be gaining popularity
David; is this what your provider wants to do, run MPLS between the PE
and CE? This has implications on which version of CE code and
platform...
As Super Scott (cape yes, but no festive boots or stockings) said; there
is a lot to be said of keeping it simple
;-)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Friday, November 18, 2005 8:54 PM
To: 'David Hoon'; ccielab@groupstudy.com
Subject: RE: MPLS VPN PE-CE encapsulation
Frame relay MAY be easier for you if you have different connection
scenarios with your MPLS VPN conversion as well. Such as how the
internet is going to be attached. (e.g. through it's own VRF, or
injected into a single VRF, or separately to certain locations)
HDLC and PPP work as well, but give a single-circuit approach.
Realistically, MPLS really doesn't care. It's just a transport. You
just need to look at the business cases for WHY in each choice you make.
Sometimes the "simple support" approach is the only reason why to pick
one over another!
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
David Hoon
Sent: Friday, November 18, 2005 2:34 PM
To: ccielab@groupstudy.com
Subject: OT: MPLS VPN PE-CE encapsulation
Hi,
Sorry for off-topic. I'm now doing a large scale Layer 3 MPLS VPN
deployment design, and stuck with which encapsulation we should use for
PE-CE connection. We have three options now: Cisco HDLC, PPP and Frame
Relay.
Technically, I don't see much different among these encapsulation
types.
The provider leans forward to frame relay, with PE as a frame relay DCE
equipment. The reason is easy for migration (we use frame relay now),
and fr can have sub-interfaces. HDLC and PPP has one-byte less header,
no big deal.
PPP has authentication, which I doubt we are going to use. Frame relay
has one more parameter (DLCI) to be managed; however, all branches will
just share the same DLCI. QoS are just the same, please correct me if
I'm wrong.
I don't see any differents, so for the sake of simple migration, I
would go frame relay. But if this is a new installation, I would go for
Cisco HDLC or PPP, for simple configuration. Running frame relay is make
sense but against my guts. Any recommendation from real world
installation?
Thanks a lot.
Best regards,
David Hoon
CCIE #14141
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