From: kevin gannon (kevin@gannons.net)
Date: Sat Nov 19 2005 - 05:39:24 GMT-3
For the networks I work on there is a mix of PPP/HDLC or Frame.
Frame rleay is very useful if you want to deploy multiple VRFs to
a CE and use VRF-Lite on the CE's. One thing to bear in mind
for Frame back to back for network management you might
want to look at doing end to end frame keepalives as you dont
have ILMI (usually) so if someone shuts down a PVC on the
PE end then the customer still sees the interface as up/up
and the customer NMS will not alarm to them.
Regards
Kevin
On 11/18/05, David Hoon <david.hoon.ccie@gmail.com> wrote:
> 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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