Umm.. I think so. I've never played around with that, though. Have a look at commands 'frame-relay de-group' and 'frame-relay de-list'. I think they do what you want. However, the reason I haven't bothered playing with this is because our carrier told us that as packets enter their frame relay network, *all* packets count towards working out whether you've hit the CIR, regardless of whether they already have the DE bit set. So if you set the DE bit on some packets, that doesn't affect whether your higher-priority packets will get the DE bit set if you're transmitting over your CIR - you're lowering the priority of some packets without actually raising the priority of any others. This probably varies from carrier to carrier, so talk to your carrier before getting all excited about setting DE bits. JMcL ---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 20/09/2000 08:28 am --------------------------- "Ejay Hire" <[EMAIL PROTECTED]> on 20/09/2000 02:19:52 am To: JENNY MCLEOD/NSO/CSDA@NOTES cc: Subject: FECNs and BECNs and DE's too! Question: I know that the router cannot set the Becn's and Fecn's, but can it extend QOS policies to set the DE bits on certain types of traffic? What commands do you use for this? ----Original Message Follows---- From: [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: More on FECNs and BECNs Date: Tue, 19 Sep 2000 09:22:33 +1100 I think your instructor was thinking of the DE bit. Have a look at http://www.frforum.com/basicguide/chap3.html#basictrail - the basic guide to frame relay networking. Excerpt (this refers to a diagram but you can probably work out what they're saying without the diagram)... "Let's suppose Node B is approaching a congestion condition. This could be caused by a temporary peak in traffic coming into the node from various sources or by a peak in the amount of traffic on the link between B and C. Here is how forward congestion notification would occur: Node B would detect the onset of congestion based on internal measures such as memory buffer usage or queue length. Node B would signal Node C (the downstream node, toward the destination) of the congestion by changing the forward ECN (FECN) contained within the frames destined for Node C from 0 to 1. All interim downstream nodes, as well as the attached user device, would thus learn that congestion is occurring on the DLCI(s) affected. " There is a similar description of BECNs. JMcL ---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 19/09/2000 09:18 am --------------------------- "Miller, Nathan (AZ15)" <[EMAIL PROTECTED]> on 19/09/2000 01:44:36 am Please respond to "Miller, Nathan (AZ15)" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: (bcc: JENNY MCLEOD/NSO/CSDA) Subject: More on FECNs and BECNs I have received conflicting answers to this question from a number of sources to include a Cisco Certified Instructor in a CIT course, so I am posting the question here with hope that someone "out there" can clear this up. I have been told that when a frame enters a router with the BECN or FECN bit high is this an indicator that there is congestion on a port on a frame switch that the frame has traversed (I don't question this). The piece of the instructor's explanation that I have a problem with is that the only frames that get the bit flipped are those that are part of a PVC that is running outside its CIR. He stated that the traffic moving through the same congested port on other PVCs (those running under CIR) will not be tagged even though they are moving through a congested port. I thought that every frame traversing the congested port gets the FECN or BECN bit flipped (depending on direction). I have found support for this in a couple of books, but I have seen nothing that says definitively that ALL frames through the congested port get tagged. Many thanks in advance! Nathan Miller **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. 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