Rapid PVST - flow of traffic

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Aug 29th, 2008
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In the attachment I have a common Core-Server Farm setup with Etherchannels linking all devices including server 1 and 2 using RPVST and Router 1 as the root for VLAN 100. We are copying a large amount of data from server 1 to server 2. I have done a show span vlan 100 act for all devices and it shows the port channel blocking on server farm 2 on the link between server farm 1 and 2 as indicated in the diagram. Am i correct in saying that the data from server 1 will traverse through server farm 1 -> router 1 -> router 2 -> server farm 2 -> server 2? Can anyone confirm? Thanks, Mike

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Jon Marshall Fri, 08/29/2008 - 04:14
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Yes that is the path that traffic from server1 to server2 will have to take. Usually each serverfarm switch would have connections to each core router, that way you are at most 2 jumps away whereas in your setup you are having to go the "long" way round.


shastymacnasty Fri, 08/29/2008 - 04:23
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Thanks Jon, I sorta knew thats the way it was gonna turn out, we have fairly old versions of IOS which doesnt support mac tracing so you always gotta play with stp to work out whats going where!


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