The bandwidth command will not affect the speed of your WAN link. Depending on
what routing protocol you are using, it may affect routing preference.
If you have a steady (ish) 100Mb of traffic (or even 10Mb) coming into a serial
port, no amount of prioritisation or queuing will help you, either, although
they can help if it's just short bursts of heavy traffic.
Frame relay traffic shaping can also help smooth out bursts of traffic, and (as
someone else has already responded), it can also throttle back traffic if the
carrier network is congested.
JMcL
---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 19/09/2000 09:28 am
---------------------------
"Frank Wells" <[EMAIL PROTECTED]> on 19/09/2000 03:41:46 am
Please respond to "Frank Wells" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
cc: (bcc: JENNY MCLEOD/NSO/CSDA)
Subject: Re: what does becn and fecn high value indicate?
Of course you cannot control the FECN and BECN bits. What you can do though
is adjust the manner in which your IP traffic negotiates moving from fast
links to slower links (LAN to WAN etc). This is where the bandwidth command
amongst others can be useful.
For example, routing off a fast ethernet port across the router into one of
its serial ports requires a slowing of traffic. Serial ports cannot handle
anywhere near 100mb of traffic. There are a number of ways one can handle
this; prioritizing, queueing and using the bandwidth parameter are a few
that spring to mind. Each has its own merits and limitations so further
investigation is warranted...
>From: "Ejay Hire" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: what does becn and fecn high value indicate?
>Date: Mon, 18 Sep 2000 11:12:20 CDT
>
>The fecn & becn bits are set by the frame-relay switch(es) whenever there
>is congestion in the cloud. Nothing you can do on the router will make
>them not be set, they are a flow control mechanism.
>
>
>----Original Message Follows----
>From: "Frank Wells" <[EMAIL PROTECTED]>
>Reply-To: "Frank Wells" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: what does becn and fecn high value indicate?
>Date: Mon, 18 Sep 2000 08:22:38 PDT
>
>Hey Atif,
>If I recall correctly, doesn't setting the 'bandwidth'command on the WAN
>link (frame relay in this case) resolve this problem?
>
>
>>From: "Atif Awan" <[EMAIL PROTECTED]>
>>Reply-To: "Atif Awan" <[EMAIL PROTECTED]>
>>To: "Yee, Jason" <[EMAIL PROTECTED]>, "cisco@groupstudy. com
>>\(E-mail\)" <[EMAIL PROTECTED]>
>>Subject: Re: what does becn and fecn high value indicate?
>>Date: Mon, 18 Sep 2000 14:48:27 +0500
>>
>>
>>BECN stands for Backward Explicit Congestion Notification. This indicates
>>that there is congestion in the path opposite to the packets which have
>>this
>>BECN bit set. In your case you are getting a lot of packets with this BECN
>>bit set and this is not a good sign. There is congestion outwards from
>>your
>>router.
>>
>>Regards
>>Atif
>>
>>----- Original Message -----
>>From: "Yee, Jason" <[EMAIL PROTECTED]>
>>To: "cisco@groupstudy. com (E-mail)" <[EMAIL PROTECTED]>
>>Sent: Monday, September 18, 2000 12:15 PM
>>Subject: what does becn and fecn high value indicate?
>>
>>
>> > hi , Anyone
>> >
>> > Knows what the BECN and FECN in sh frame-relay pvc indicates :
>> >
>> > and a high BECN indicates what?
>> >
>> >
>> > PVC Statistics for interface Hssi4/1 (Frame Relay DTE)
>> >
>> > DLCI = 299, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE =
>>Hssi4/1.10
>> >
>> > input pkts 1263236605 output pkts 1388118986 in bytes 2167041222
>> > out bytes 3760560232 dropped pkts 1 in FECN pkts 0
>> > in BECN pkts 791683517 out FECN pkts 0 out BECN pkts 0
>> > in DE pkts 29527 out DE pkts 0
>> > out bcast pkts 16346 out bcast bytes 5868214
>> > pvc create time 11w6d, last time pvc status changed 05:27:23
>> >
>> >
>> > thanks
>> >
>> > Jason
>> >
>> >
>> > **NOTE: New CCNA/CCDA List has been formed. For more information go to
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