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RSPAN collector switch problem

Hi All,

 

So I want to RSPAN all the traffic coming from 12 switches.

 

I have configured a port on each switch and cabled that to a collector switch. The collector switch has 3 x 10GB links into our monitoring server.

 

 I have configured 3 vlans as remote-span vlans, and logically assigned groups of switches to use those vlans. Then each vlan has it's own 10GB link into the monitoring server.

 

All works well when I just have 1 source sending to the collector switch. The CS only receives on it's port.

 

But as soon as I connect up another source, the 2 ports linking the source switchs to the collector switch have 2 way traffic.

 

I want to stop the traffic sending back up to the source switches.

 

How can I do this please?

 

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