26-14
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
—
Release 8.1
78-15486-01
Chapter 26 Configuring SPAN and RSPAN
Configuring RSPAN
Configuring a Single RSPAN Session
This example shows how to configure a single RSPAN session.
Figure 26-3
shows an RSPAN
configuration; see
Table 26-1
for the necessary commands to configure this RSPAN session.
Table 26-1
assumes that you have already set up RSPAN VLAN 901 for this session on all the switches using the
set vlan vlan_num rspan command. With VTP enabled in the network, you can create the RSPAN
VLAN in one switch and VTP propagates it to the other switches in the VTP domain. Note that in the
configuration example shown in
Table 26-1
, the RSPAN session may be disabled in Switch A or B or
both without modifying the configuration in Switch C or Switch D.
Figure 26-3 Single RSPAN Session
Modifying an Active RSPAN Session
This example shows how to modify an active RSPAN session. Use
Figure 26-3
for reference; see
Table 26-2
for the necessary commands to disable an RSPAN session and to add or remove source ports
from an RSPAN session.
Table 26-1 Configuring a Single RSPAN Session
Switch
Ports
Reflector
Port
RSPAN
VLAN
Direction
RSPAN CLI Commands
A (source)
4/1, 4/2
4/3
901
Ingress
set rspan source 4/1-2 901 rx reflector 4/3
B (source)
3/1, 3/2, 3/3
3/4
901
Bidirectional
set rspan source 3/1-3 901 reflector 3/4
C (intermediate)
–
–
901
–
No RSPAN CLI command needed
D (destination)
1/2
–
901
–
set rspan destination 1/2 901
1/1
1/2
3/1
3/2
1/2
4/1 4/2
1/2
3/1 3/2
1/1
3/3
Switch A
Switch C
Switch D
Switch B
Probe
Destination switch
(data center)
Intermediate switch
(distribution)
Source switch(es)
(access)
4/3
3/3
58634
T1
T2
T3
Table 26-2 Making Modifications to an Active RSPAN Session
Switch
Action
RSPAN CLI Commands
A (source)
Disable the RSPAN session.
set rspan disable source 901
