RSPAN

From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Feb 16 2005 - 15:18:38 GMT-3


Hi guys,

 This is interesting.

 sw1 and sw2 are configured for rspan. On sw1, all incoming traffic from
vlan
 2 is being sent to a sniffer on sw2's fa0/23.

 sw2 doesn't have any ports assigned to vlan 2.

 Here's the config:

 SW1#f monit
 monitor session 1 source vlan 2 rx
 monitor session 1 destination remote vlan 10 reflector-port Fa0/7
 !
 sw2#f monit
 monitor session 1 destination interface Fa0/23
 monitor session 1 source remote vlan 10
 !
 end

 sw2#c
 Enter configuration commands, one per line. End with CNTL/Z.
 sw2(config)#mon ses 1 sour vlan 2 rx
 % Cannot add VLANs as source for session 1 - a RSPAN Destination session
 sw2(config)#

Notice that the switch doesn't allow me to vlan 2 as another source.

 Suppose sw2 had ports assigned to vlan 2. How would I configure rspan to
 monitor all traffic received from vlan 2?

 If sw2 had ports assigned to vlan 2, wold rspan automatically include the
 traffic from those sw2 ports in vlan 2 because of the config on sw1?

 TIA, Tim



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