Span session trafic seen in multiple switch

Unanswered Question
Nov 21st, 2007


in my Campus Lan, i've one core switch (4506) and several acess swicth (2950)

On an access switch i create a monitor sesion to get trafic for a particular port. Works fine.

On another switch (not in the same stack), i create another monitor session (with the same number) to see trafic for a particulor poirt on this switch. Works fine BUT i also see trafic from monitor on the other span session ?

I don't understand why. I don't use rspan.

Any idea ?


I have this problem too.
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glen.grant Wed, 11/21/2007 - 05:53

If its a trunked environment you could see some of the same traffic.

Kevin Dorrell Wed, 11/21/2007 - 06:09

Are you sure it is not just the broadcast traffic you are seeing? If so, that would be normal.

Kevin Dorrell


gbusson Wed, 11/21/2007 - 09:20

No, i ve all traffic and the port spanned are not in trunk mode


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