Administrator Guide

In the following example, the host and server are exchanging traffic 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 configured to only monitor
traffic received on tengigabitethernet 0/1 (host-originated traffic).
Figure 91. 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).
• In general, a monitoring port should have no ip address and no shutdown as the only
configuration; the Dell Networking OS permits a limited set of commands for monitoring ports. You can
display these commands using the ? command.
• A monitoring port may not be a member of a VLAN.
• There may only be one destination port in a monitoring session.
• A source port (MD) can only be monitored by one destination port (MG). If you try to assign a monitored
port to more than one monitoring port, the following message displays:
Dell(conf)#mon ses 1
Dell(conf-mon-sess-1)#source tengig 0/1 destination tengig 0/8 direction both
Port Monitoring 698