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Posted by GS on September 16, 2005, 6:54 pm
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A switch contains 3 uplinks which are on WAN side and there 30 LAN
ports for subscriber side, how to implement Spanning tree protocol
(802.1d) in this switch?. Can somebody suggest how to implement STP and
what are the things has to take care on interface level?. Thanks in
advance. We have chip called "xyz" which inter connects WAN and LAN.
Thanks in advance.
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Posted by Walter Roberson on September 17, 2005, 4:30 pm
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:A switch contains 3 uplinks which are on WAN side and there 30 LAN
:ports for subscriber side, how to implement Spanning tree protocol
:(802.1d) in this switch?. Can somebody suggest how to implement STP and
:what are the things has to take care on interface level?. Thanks in
:advance. We have chip called "xyz" which inter connects WAN and LAN.
Sorry, GS, your question looks suspiciously like a course assignment.
If you are actually working for a company that designs switches,
then I would expect you to have read the appropriate RFCs throroughly
and to ask -specific- questions -- and I would expect that the
company would have hired someone who had switch design experience.
--
'The short version of what Walter said is "You have asked a question
which has no useful answer, please reconsider the nature of the
problem you wish to solve".' -- Tony Mantler
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Posted by GS on September 18, 2005, 8:38 am
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Actually I am looking for some info about how spanning tree protocol
can be interfaced with WAN and LAN ports?, that's all I needed.
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Posted by Walter Roberson on September 18, 2005, 4:17 pm
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:Actually I am looking for some info about how spanning tree protocol
:can be interfaced with WAN and LAN ports?, that's all I needed.
The Spanning Tree Protocol doesn't care whether a port is a WAN
or LAN port. You can send BPDU on a WAN link.
Whether it is worth sending BPDUs or not depends upon whether there is
any possibility that the far hop of the WAN link might have topology
loops that you need to arbitrate between.
Perhaps you are asking about a different matter, which is to say
tunneling of BPDUs over WAN links, so that you can have an
extended "layer 2" path resolution instead of using a "routing"
path resolution? If that's what you are trying to do, then this
article might be of interest:
http://www.netcraftsmen.net/welcher/papers/metroeth01.html
--
Feep if you love VT-52's.
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Posted by GS on September 20, 2005, 4:41 am
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This whole STP/Bridge implementtaion does really care about hardware
interfaces (physical ports)? Or is it everything is in software only,
for example, if the port's state is changed (if the port is got
disconnected)?. Thanks.
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