Concept Guide

Dell EMC Networking OS Behavior: The platform continues to mirror outgoing trac even after an MD participating in spanning tree
protocol (STP) transitions from the forwarding to blocking.
Conguring Port Monitoring
To congure port monitoring, use the following commands.
1 Verify that the intended monitoring port has no conguration other than no shutdown, as shown in the following example.
EXEC Privilege mode
show interface
2 Create a monitoring session using the command monitor session from CONFIGURATION mode, as shown in the following example.
CONFIGURATION mode
monitor session
monitor session type rpm/erpm
type is an optional keyword, required only for rpm and erpm
3 Specify the source and destination port and direction of trac, as shown in the following example.
MONITOR SESSION mode
source
Example of Viewing Port Monitoring Conguration
To display information on currently congured port-monitoring sessions, use the show monitor session command from EXEC
Privilege mode.
DellEMC(conf)#monitor session 0
DellEMC(conf-mon-sess-0)#$source GigabitEthernet 1/1 dest GigabitEthernet 1/2 dir rx
DellEMC(conf-mon-sess-0)#show c
!
monitor session 0
source GigabitEthernet 1/1 destination GigabitEthernet 1/2 direction rx
DellEMC(conf-mon-sess-0)#
DellEMC(conf-mon-sess-0)#do show monitor session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL Drop Rate
Gre-Protocol FcMonitor
------ ------ ------------ --- ---- --------- -------- ---- --- ---- ----
----------- ---------
0 Gi 1/1 Gi 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/
A N/A No
DellEMC(conf)#monitor session 0
DellEMC(conf-mon-sess-0)#source po 10 dest ten 1/2 dir rx
DellEMC(conf-mon-sess-0)#do show monitor session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL Drop
Rate Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- -------- ---- --- ----
---- ----------- ---------
0 Gi 1/1 Gi 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/
A N/A No
0 Po 10 Gi 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/
A N/A No
DellEMC(conf)#monitor session 1
DellEMC(conf-mon-sess-1)#source vl 40 dest ten 1/3 dir rx
DellEMC(conf-mon-sess-1)#flow-based enable
DellEMC(conf-mon-sess-1)#exit
DellEMC(conf)#do show monitor session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL Drop Rate
Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- -------- ---- --- ---- ----
----------- ---------
0 Gi 1/1 Gi 1/2 rx Port 0.0.0.0 0.0.0.0 0 0 No N/
Port Monitoring
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