From: Chris Larson (clarson52@comcast.net)
Date: Mon Mar 28 2005 - 15:06:36 GMT-3
enables the forwarding of bcasts/mcasts generated by the router (not every
bcast received) such as ospf routing updates etc.
...... Original Message .......
On Mon, 28 Mar 2005 18:36:28 +0200 "Alexander Arsenyev (GU/ETL)"
<alexander.arsenyev@ericsson.com> wrote:
>Useless broadcasts/multicasts consume bandwidth. FR multipoint interface
may have many PVCs but all these PVCs have to share the same physical line.
>Of course, replicating broadcast/multicast packets also consumes memory
and CPU cycles.
>Bottom line is - make sure that broadcast/multicast packets are sent only
on those PVCs where necessary and that's my understanding of the function
of the "broadcast" keyword.
>HTH,
>Cheers
>Alex
>
>-----Original Message-----
>From: Dillon Yang [mailto:gzdillon@hotmail.com]
>Sent: 28 March 2005 16:52
>To: Alexander Arsenyev (GU/ETL)
>Cc: Group Study
>Subject: Re: NBMA in real word
>
>
>Hi, Alexander:
>
>Thanks.
>But I want to know some real situation that the "broadcast" is harmful.
Say, the cisco is a vendor that will not put a useless keyword into the
IOS. If the command without "broadcast" has no specific usage, then it
should be merged with the command with "broadcast" into a SINGLE command.
>Any advice?
>
>TIA
>dillon
>
>----- Original Message -----
>From: "Alexander Arsenyev (GU/ETL)" <alexander.arsenyev@ericsson.com>
>To: "'Dillon Yang'" <gzdillon@hotmail.com>; <ccielab@groupstudy.com>
>Sent: Monday, March 28, 2005 11:19 PM
>Subject: RE: NBMA in real word
>
>
>> My 2 pence:
>> 1) Good practice is NOT to map spoke-to-spoke with "broadcast" keyword,
broadcasts from one spoke to another won't be propagated by hub anyway.
>> 2) "broadcast" keyword also applies to multicast. Therefore, if Your
task asks You to propagate mcast to a subset of spokes then map with
"broadcast" only relevant (multicast-enabled) spokes.
>> HTH,
>> Cheers
>> Alex
>>
>> -----Original Message-----
>> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
>> Sent: 28 March 2005 15:07
>> To: Group Study
>> Subject: NBMA in real word
>>
>>
>> Hi, group:
>>
>> Normally, the command "frame-relay map ip xxx broad" works. But I
never meet a situation that the FR link can not allow broadcast, anybody
can explain what case the "broadcast" can not be allowed?
>>
>> TIA
>> dillon
>>
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Sent from the phone of:
Chris Larson CCIE #12380, PMP
Principal Consultant
Superior Technology Networks Inc.
703 577 3303 / 800 746 3556
www.supertechnetworks.com
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