DELL N3000 User Manual

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Monitoring Switch Traffic
Enable the monitor session:
console(config)#monitor session 1 mode
RSPAN cannot use the CPU as a mirror source. Instead, configure remote 
capture to view packets sent to or from the switch CPU.
RSPAN Transit Switch
The following is an example of an RSPAN transit switch configuration. The 
RSPAN VLAN should be configured as a remote-span in order to disable 
MAC learning on the VLAN. In this case, the transit switch ports are 
configured as trunk ports (members of all VLANs) and may be used by other 
traffic. Packets on the transit switch (in this example) are received and 
transmitted tagged.
Configure remote span on a VLAN:
console#configure
console(config)#vlan 723
console(config-vlan723)#remote-span
console(config-vlan723)#exit
Configure the transit switch ports in trunk mode:
console(config)#interface te1/0/1
console(config-if-Te1/0/1)#switchport mode trunk
console(config-if-Te1/0/1)#interface te1/0/2
console(config-if-Te1/0/2)#switchport mode trunk
RSPAN Destination Switch
The following example shows the configuration of the RSPAN destination 
switch. The RSPAN mirrored packets are transmitted over the destination 
port untagged.
Configure remote span on VLAN 723:
console#configure
console(config)#vlan 723
console(config-vlan723)#remote-span
console(config-vlan723)#exit
Configure interface te1/0/1 as the destination port.
console(config)#interface te1/0/1