TIMESTAMPS:
0:00 Introduction
2:05 Configure SPAN
8:00 Verify SPAN
10:30 Configure RSPAN
14:13 Verify RSPAN
17:06 Conclusion
How to Configure SPAN and RSPAN on Cisco switches
Local SPAN (Switch Port Analyzer) supports a SPAN session entirely within one device;
all source ports or source VLANs and destination ports are in the same device or device stack.
Local SPAN copies traffic from one or more source ports in any VLAN or from one or more VLANs to a destination port for analysis.
Configure a Local SPAN Session
SW1:
conf t
no monitor session 1
monitor session 1 source interface fa0/1
!Check monitor session 1 filter vlan 1 - 5
monitor session 1 destination interface fa0/2
!Check encapsulation replicate. Use keyworkds "monitor session 1 destination interface"
end
wr
Verify
show monitor session 1
show monitor session 1 detail
Remote SPAN
RSPAN supports source ports, source VLANs, and destination ports on different devices (or different device stacks),
enabling remote monitoring of multiple devices across your network.
Configure a RSPAN Session
SW1:
conf t
vlan 101
remote-span
!
interface fa0/2
switchport trunk encapsulation dot1q
switchport mode trunk
end
wr
SW2:
conf t
vlan 101
remote-span
!
interface fa0/2
switchport trunk encapsulation dot1q
switchport mode trunk
end
wr
SW1:
conf t
monitor session 1 source interface fa0/1
monitor session 1 destination remote vlan 101
end
wr
SW2:
conf t
monitor session 1 source remote vlan 101
monitor session 1 destination interface fa0/1
end
wr
Verify
show monitor session 1
show monitor session 1 detail
References:
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How to Configure SPAN and RSPAN on Cisco Switches
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