Original Setup of a Router Connected to a Switch

Switch1 has a source host, and Switch2 has a RSPAN destination port defined, as follows:

Step 1. Define the VLAN used for RSPAN on the appropriate switches. Here, VLAN 4 is used:

Switch1 (enable) set vlan 4 rspan 

!Cannot use an existing vlan, create a vlan that is currently not used

Switch2 (enable) set vlan 4 rspan

Step 2. Configure source port, 10/3, for RSPAN on Switch1:

Switch1 (enable) set rspan source 10/3 4

Rspan Type      : Source

Destination     : -

Rspan Vlan      : 4

Admin Source    : Port 10/3

Oper Source     : Port 10/3

Direction       : transmit/receive

Incoming Packets: -

Learning        : -

Multicast       : enabled

Filter          : -

Status          : active

Step 3. Associate a destination port, 3/1, for RSPAN VLAN 4 on Switch2:

Switch2 (enable) set rspan destination 3/1 4

Rspan Type      : Destination

Destination     : Port 3/1

Rspan Vlan      : 4

Admin Source    : -

Oper Source     : -

Direction       : -

Incoming Packets: disabled

Learning        : enabled

Multicast       : -

Filter          : -

Status          : active

Any subsequent traffic generated or received on port 10/1 on Switch1 will be copied and forwarded to the sniffer on port 3/1 on Switch2.

Table 12-2 shows when the SPAN/RSPAN features became available in Catalyst OS.