From: David Hoon (david.hoon.ccie@gmail.com)
Date: Fri Nov 18 2005 - 16:34:18 GMT-3
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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