Deployment Guide

NOTE: By default, all uplink ports are assigned to port-channel (LAG) 128 and the destination port in a port monitoring session
must be an uplink port. When you congure the destination port using the source command, the destination port is removed
from LAG 128. To display the uplink ports currently assigned to LAG 128, enter the show lag 128 command.
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.
Dell(conf)# monitor session 0
Dell(conf-mon-sess-0)# source tengig 0/1 dest tengig 0/8 direction rx
Dell(conf-mon-sess-0)#exit
Dell(conf)# do show monitor session 0
SessionID Source Destination Direction Mode Type
--------- ------ ----------- --------- ---- ----
0 TenGig 0/1 TenGig 0/8 rx interface Port-based
Dell(conf)#
In the following example, the host and server are exchanging trac which passes through the uplink interface 0/1. Port 0/1 is the
monitored port and port 0/8 is the destination port, which is congured to only monitor trac received on tengigabitethernet 0/1 (host-
originated trac).
Figure 92. Port Monitoring Example
Important Points to Remember
• Port monitoring is supported on physical ports only; virtual local area network (VLAN) and port-channel interfaces do not support port
monitoring.
• The monitored (the source, [MD]) and monitoring ports (the destination, [MG]) must be on the same switch.
• The monitored (source) interface must be a server-facing interface in the format slot/port, where the valid slot numbers are 0 and
server-facing port numbers are from 1 to 8.
• The destination interface must be an uplink port (ports 9 to 12).
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Port Monitoring