• Reserved Vlan cannot have untagged portsIn the reserved L2 VLAN used for remote port mirroring:• MAC address learning in the reserved VLAN is automatically disabled.• The reserved VLAN for remote port mirroring can be automatically configured in intermediate switches by using GVRP.• There is no restriction on the VLAN IDs used for the reserved remote-mirroring VLAN. Valid VLAN IDs are from 2 to 4094. Thedefault VLAN ID is not supported.• In mirrored traffic, packets that have the same destination MAC address as an intermediate or destination switch in the pathused by the reserved VLAN to transport the mirrored traffic are dropped by the switch that receives the traffic if the switch hasa L3 VLAN configured.In a source session used for remote port mirroring:• You can configure any port as a source port in a remote-port monitoring session with a maximum of three source ports per portpipe.• Maximum number of source sessions supported on a switch: 4• Maximum number of source ports supported in a source session: 128• You can configure physical ports and port-channels as sources in remote port mirroring and use them in the same source session.You can use both Layer 2 (configured with the switchport command) and Layer 3 ports as source ports. You can optionallyconfigure one or more source VLANs to specify the VLAN traffic to be mirrored on source ports.• You can use the default VLAN and native VLANs as a source VLAN.• You cannot configure the dedicated VLAN used to transport mirrored traffic as a source VLAN.• Egressing remote-vlan packets are rate limited to a default value of 100 Mbps.In a destination session used for remote port mirroring:• Maximum number of destination sessions supported on a switch: 64• Maximum number ports supported in a destination session: 64.• You can configure any port as a destination port.• You can configure additional destination ports in an active session.• You can tunnel the mirrored traffic from multiple remote-port source sessions to the same destination port.• By default, destination port sends the mirror traffic to the probe port by stripping off the rpm header. We can also configure thedestination port to send the mirror traffic with the rpm header intact in the original mirror traffic..• By default, ingress traffic on a destination port is dropped.RestrictionsWhen 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 portthat 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 asthe 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 dedicatedRPM VLAN which is used to transport mirrored traffic. You can configure multiple ports for the dedicated RPM VLAN onintermediate and destination switches.Displaying Remote-Port Mirroring ConfigurationsTo display the current configuration of remote port mirroring for a specified session, enter the show config command in MONITORSESSION configuration mode.Dell(conf-mon-sess-2)#show config!Port Monitoring 651
