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Restrictions
When you configure remote port mirroring, the following restrictions apply:
You can configure the same source port to be used in multiple source sessions.
You cannot configure a source port channel or source VLAN in a source session if the port channel or VLAN has a member
port that is configured as a destination port in a remote-port mirroring session.
A destination port for remote port mirroring cannot be used as a source port, including the session in which the port
functions as the destination port.
A destination port cannot be used in any spanning tree instance.
The reserved VLAN used to transport mirrored traffic must be a L2 VLAN. L3 VLANs are not supported.
On a source switch on which you configure source ports for remote port mirroring, you can add only one port to the
dedicated RPM VLAN which is used to transport mirrored traffic. You can configure multiple ports for the dedicated RPM
VLAN on intermediate and destination switches.
Displaying Remote-Port Mirroring Configurations
To display the current configuration of remote port mirroring for a specified session, enter the show config command in
MONITOR SESSION configuration mode.
DellEMC(conf-mon-sess-2)#show config
!
monitor session 2 type rpm
source fortyGigE 1/32/1 destination remote-vlan 300 direction rx
source Port-channel 10 destination remote-vlan 300 direction rx
no disable
To display the currently configured source and destination sessions for remote port mirroring on a switch, enter the show
monitor session command in EXEC Privilege mode.
DellEMC(conf)#do show monitor session
SessID Source Destination Dir Mode Source IP Dest IP
------ ------ ----------- --- ---- --------- --------
1 remote-vlan 100 Fo 1/32/1 N/A N/A N/A N/A
1 remote-vlan 100 Po 100 N/A N/A N/A N/A
2 Fo 1/4/1 remote-vlan 300 rx Port N/A N/A
2 Po 10 remote-vlan 300 rx Port N/A N/A
To display the current configuration of the reserved VLAN, enter the show vlan command.
DellEMC#show vlan
Codes: * - Default VLAN, G - GVRP VLANs, R - Remote Port Mirroring VLANs, P - Primary, C
- Community, I - Isolated
O - Openflow
Q: U - Untagged, T - Tagged
x - Dot1x untagged, X - Dot1x tagged
o - OpenFlow untagged, O - OpenFlow tagged
G - GVRP tagged, M - Vlan-stack
i - Internal untagged, I - Internal tagged, v - VLT untagged, V - VLT tagged
NUM Status Description Q Ports
* 1 Inactive
R 100 Active T Fo 1/20/1
R 300 Active T Fo 1/24/1
Configuration procedure for Remote Port Mirroring
To configure remote port mirroring, you must configure:
1. A reserved VLAN used to transport mirrored packets on source, intermediate, and destination switches
2. A source session that consists of multiple source ports, port channels, and VLANs which are associated with the dedicated
VLAN and located on different source switches
Port Monitoring
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