Hi all. Im now in charge of a medium/big size network (around 1200 machines).
Today i found some connection pattern that im not shoure if it is correct.

For simplicity, just use 3 switches: The Core, sw A and sw B.
Say it is connected this way

Core <--> A <--> B

Switch A have 2 uplink ports (port 49 and 50).
Switch A is wired to the core via their uplink port 49, but...
Switch A is wired to switch B also via a uplink port (50) !

I migth be wrong, but i think this kind of connection would cause a continue RSTP change of topology (confusing about the 'direction' of the route to take), so having some latency period (this pattern of connection can be repeated several times in the whole network).

BTW, there is no special configuration in switch A for saiyng that port 50 is not being used as a uplink port.

Any advices will be appretiated about this to clarify my mind.

Thanks all.

Gerardo

Port channel?

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http://reggle.wordpress.com

Im not shure what you are asking to me. There is no special configuration in the switch. Just the default configuration. The guy who install the switch just brought it, put the IP and connect it to the net.
No VLANs, no trunking, no nothing.
That answer your question?

Thanks for your time

There are no special "uplink" ports that you have to configure different than any other port, they are all the same ( not necessarily true with ME-equipment, but I'm guessing we're talking office/enterprise here)

Sent from my LT26i

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som om sinnet hade svartnat för evigt.

In that case, you're probably right that one port will be blocked in spanning-tree. Very inefficient config. 'show spanning-tree' can help here.

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http://reggle.wordpress.com

Nothing will be blocked unless Switch B also is connected back to Core. 'show spanning-tree' will show any blocked ports if there are any.

Sent from my LT26i

_________________
som om sinnet hade svartnat för evigt.