Re: Setting the DE bit in frame relay

From: Bajo (bajoalex@gmail.com)
Date: Tue Mar 01 2005 - 11:53:50 GMT-3


Wayne,

A search on the DOC-CD:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fwan_c/wcffrely.htm

"When the output interface queue reaches or exceeds the ECN excess
threshold, all Frame Relay DE bit packets on all PVCs crossing that
interface will be marked with FECN or BECN, depending on their
direction of travel. When the queue reaches or exceeds the ECN
committed threshold, all Frame Relay packets will be marked with FECN
or BECN."

R1(config-if)#frame co?
congestion-management

R1(config-if)#frame co

R1(config-fr-congest)#?
Frame Relay congestion management configuration commands:
 default Set a command to its defaults
 exit Exit from frame relay congestion management configuration mode
 no Negate a command or set its defaults
 threshold Configure Frame Relay congestion thresholds
 <cr>

R1(config-fr-congest)#thres?
threshold

R1(config-fr-congest)#thres ?
 de Configure Frame Relay DE discard threshold
 ecn Configure Frame Relay ECN congestion thresholds

R1(config-fr-congest)#thres

interface serial1

   encapsulation frame-relay

   frame-relay intf-type dce

   frame-relay congestion-management

     threshold ecn be 0

     threshold ecn bc 20

     threshold de 40

On Tue, 1 Mar 2005 13:55:34 +0000, kuldip singh <dipa.singh@gmail.com> wrote:
> Wayne,
> Below is example of how to use the de-list:
>
> The following example specifies that IP packets larger than 512 bytes
> (including the 4-byte Frame Relay Encapsulation) will have the DE bit
> set:
>
> frame-relay de-list 1 protocol ip gt 512
>
>
> On Tue, 1 Mar 2005 13:15:55 +0000, Wayne Bellward <wbellward@gmail.com> wrote:
> > Hi,
> >
> > This is the first time i've actually posted a question, the archives
> > have always been great in the past. I'm sure someone can help and it
> > would be greatly appreciated.
> >
> > I'd like to set the discard eligible bit for ip on my standard frame
> > relay interface and can't seem to find anything substantial on this or
> > how to confirm it. I have a 2521 as my frame switch and am using frame
> > route commands so I'm not even sure I can confirm any of the FRTS
> > functions i configure.
> >
> > interface Serial0
> > ip address 137.20.101.2 255.255.255.0
> > encapsulation frame-relay
> > ip ospf network broadcast
> > ip ospf priority 0
> > no fair-queue
> > frame-relay interface-dlci 201
> > end
> >
> > Any help or advise on this would be great.
> >
> > Many Thanks,
> >
> > Wayne
> >
> > _______________________________________________________________________
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>
> _______________________________________________________________________
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>

-- 
Kind Regards,

Bajo



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