From: David Duncon (david_ccie@hotmail.com)
Date: Tue Feb 22 2005 - 00:44:43 GMT-3
Hi Group,
We are in the processes of trialing out Ethernet WAN ( WAN service is
directly delivered on to RJ 45 interface at CPE via DSL ) on couple of WAN
sites those are currently running Frame relay. Just like the Frame world ,
with in Ethernet WAN we do have bandwidth of 1:2 or 1:4 etc contentious
ratios between CIR and Access. In other words with in DSL based Ethernet
WAN, our Telco do offer us a equivalent concept of CIR and Access values.
Since we intend to run converged networks on this Ethernet WAN trail sites
as well , we got to protect Voice traffic with in given CIR from the bursty
Data traffic. Now my Q is how can I make it happen as unlike Frame relay ,
Ethernet WAN do not have a congestions indicators such as BECN , FECN and DE
s. So how we can make the shaping happen on Ethernet WAN ?
Secondly queuing can still happen , I guess with LLQ to protect RTP and
Signaling streams and should be able apply the service policy on Egress int
of Fast Ethernet on the edge routers where WAN services are terminated. I
think in the absence of effective shaping parameters on the Ethernet
interface , I guess I can still use CAR to limit the out bout traffic ??So I
am wondering what is my bets bet in terms of deploying
shaping/queuing/policing on Ethernet interface on the edge router which is
connected to Ethernet WAN.
Appreciate any feed back from people who have rolled out similar solutions
on their WAN.
Cheers
- David.
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