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ManualsBrandsDell ManualsAccess PlatformsNetworking S3100 Series
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------ ------ ----------- --- ---- --------- --------
---- --- ---- ---- ----------- ------
0 Te 1/50 Te 1/51 rx Port N/A N/A
N/A N/A No N/A N/A yes
1 Gi 1/45 Gi 1/46 tx Port N/A N/A
N/A N/A No N/A N/A yes
2 NONE NONE N/A N/A N/A N/A
N/A N/A No N/A N/A No
300 Gi 1/17 Gi 1/4 tx Port N/A N/A
N/A N/A No N/A N/A No
DellEMC(conf-mon-sess-300)#
Example of Viewing a Monitoring Session
In the example below, 0/25 and 0/26 belong to Port-pipe 1. This port-pipe has the same restriction of only four destination
ports, new or used.
DellEMC(conf-mon-sess-300)#do show mon session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL
Drop Rate Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- -------- ---- ---
---- ---- ----------- ---------
0 Gi 1/13 Gi 2/1 rx interface N/A N/A 0 0
No N/A N/A yes
10 Gi 1/14 Gi 2/2 rx interface N/A N/A 0 0
No N/A N/A yes
20 Gi 1/15 Gi 2/3 rx interface N/A N/A 0 0
No N/A N/A yes
30 Gi 1/16 Gi 2/4 rx interface N/A N/A 0 0
No N/A N/A yes
100 Gi 1/25 Gi 2/5 tx interface N/A N/A 0 0
No N/A N/A yes
110 Gi 1/26 Gi 2/5 tx interface N/A N/A 0 0
No N/A N/A yes
300 Gi 1/17 Gi 2/5 tx interface N/A N/A 0 0
No N/A N/A yes
DellEMC(conf-mon-sess-5)#
Given these parameters, the following illustration shows the possible port monitoring configurations.
Figure 92. Port Monitoring Configurations
Dell EMC Networking OS Behavior: All monitored frames are tagged if the configured monitoring direction is egress (TX),
regardless of whether the 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 the VLAN 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 3 VLAN, the frames are tagged with the respective Layer 3 VLAN ID. For example, in
the configuration source Gig 6/1 destination Gig 6/2 direction tx, if the MD port Gig 6/1 is an untagged member of any VLAN,
all monitored frames that the MG port Gig 6/2 receives are tagged with the VLAN ID of the MD port. Similarly, if BPDUs are
transmitted, the MG port receives them tagged with the VLAN ID 4095. This behavior might result in a difference between the
number of egress packets on the MD port and monitored packets on the MG port.
Dell EMC 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.
Port Monitoring
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