Dell Networking OS Behavior: All monitored frames are tagged if the configured monitoring direction is egress (TX), regardless of whetherthe monitored port (MD) is a Layer 2 or Layer 3 port. If the MD port is a Layer 2 port, the frames are tagged with the VLAN ID of theVLAN to which the MD belongs. If the MD port is a Layer 3 port, the frames are tagged with VLAN ID 4095. If the MD port is in a Layer 3VLAN, the frames are tagged with the respective Layer 3 VLAN ID. For example, in the configuration source TenGig 6/1 destination TeGig6/2 direction tx, if the MD port TenGig 6/1 is an untagged member of any VLAN, all monitored frames that the MG port TeGig 6/2 receivesare tagged with the VLAN ID of the MD port. Similarly, if BPDUs are transmitted, the MG port receives them tagged with the VLAN ID4095. This behavior might result in a difference between the number of egress packets on the MD port and monitored packets on the MGport.Dell Networking OS Behavior: The platform continues to mirror outgoing traffic even after an MD participating in spanning tree protocol(STP) transitions from the forwarding to blocking.Configuring Port MonitoringTo configure port monitoring, use the following commands.1 Verify that the intended monitoring port has no configuration other than no shutdown, as shown in the following example.EXEC Privilege modeshow interface2 Create a monitoring session using the command monitor session from CONFIGURATION mode, as shown in the following example.CONFIGURATION modemonitor sessionmonitor session type rpm/erpmtype is an optional keyword, required only for rpm and erpm3 Specify the source and destination port and direction of traffic, as shown in the following example.MONITOR SESSION modesourceExample of Viewing Port Monitoring ConfigurationTo display information on currently configured port-monitoring sessions, use the show monitor session command from EXECPrivilege mode.Dell(conf)#monitor session 0Dell(conf-mon-sess-0)#$source te 1/1 dest te 1/2 dir rxDell(conf-mon-sess-0)#show c!monitor session 0source TenGigabitEthernet 1/1 destination TenGigabitEthernet 1/2 direction rxDell(conf-mon-sess-0)#Dell(conf-mon-sess-0)#do show monitor sessionSessID Source Destination Dir Mode Source IP Dest IP DSCP TTL DropRate Gre-Protocol FcMonitor------ ------ ------------ --- ---- --------- -------- ---- --- -------- ----------- ---------0 Te 1/1 Te 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/A N/A NoDell(conf)#monitor session 0Dell(conf-mon-sess-0)#source po 10 dest ten 1/2 dir rxDell(conf-mon-sess-0)#do show monitor sessionSessID Source Destination Dir Mode Source IP Dest IP DSCP TTL DropRate Gre-Protocol FcMonitor------ ------ ----------- --- ---- --------- -------- ---- --- -------- ----------- ---------0 Te 1/1 Te 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/A N/A No0 Po 10 Te 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/A N/A No696 Port Monitoring
