A Cisco router will never set the DE bits unless specifically told to do so
with a frame relay DE list. The frame cloud sets the DE bit on your traffic
if you exceed the CIR or burst committed data rate for your PVC. This means
that if the cloud experiences congestion, the frames with the DE bits are
the first into the bit bucket.
Theoretically this is the way it's supposed to work. More times than not
the frame cloud will mark your frames DE even if you not exceed you SLA.
Then it's time to call the provider.
Generally, DE bits have nothing to do with port speed. Port speed is just
the speed of the link you have to the frame switch. Traffic shaping has
more effect on the rate you send to each PVC. It's a little complicated.
An easy way to show what the provider is giving you is to set up the traffic
shaping to correspond to the SLA for the PVC. Then do a "sho frame PVC" to
see the stats. DE marked frames and BECN's and FECN's, MAY be an indicator
that you are not getting the SLA you should. These parameters are CRITICAL
in voice over data applications.
Does this help at all ??
Tony M.
#6172
----- Original Message -----
From: "Mike Mandulak"
To:
Sent: Tuesday, August 07, 2001 9:16 PM
Subject: DE bits [7:15210]
> Do discard Eligible bits (DE) get set on lines that are full T1's? The
> circuit I'm looking at is a full T1 to one of my internet providers and
when
> looking at the frame stats (using cisco LMI) I see that that the cir is
set
> to zero which would mean that all frames leave my site with the DE bit
set.
> Am I misunderstanding this?
>
> MikeM
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=15218&t=15210
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
