User Manual

• 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
Dell(conf-mon-sess-1)#do show monitor session
SessionID Source Destination Direction Mode Type
--------- ------ ----------- --------- ---- ----
1 TenGig 0/1 TenGig 0/8 both interface Port-based
Dell(conf-mon-sess-1)#mon ses 2
Dell(conf-mon-sess-2)#source tengig 0/1 destination tengig 0/8 direction both
% Error: MD port is already being monitored.
NOTE: There is no limit to the number of monitoring sessions per system, provided that there are
only four destination ports per port-pipe. If each monitoring session has a unique destination port,
the maximum number of session is four per port-pipe.
Port Monitoring
The Aggregator supports multiple source-destination statements in a monitor session, but there may only
be one destination port in a monitoring session.
There may only be one destination port in a monitoring session (% Error: Only one MG port is
allowed in a session.).
The number of source ports the Dell Networking OS allows within a port-pipe is equal to the number of
physical ports in the port-pipe (n). Multiple source ports may have up to four different destination ports
(Exceeding max MG ports for this MD port pipe.).
In the following examples, ports 0/1, 0/2, 0/3, and 0/4 all belong to the same port-pipe. These ports
mirror traffic to four different destinations (0/9, 0/10, 0/11, and 0/12).
Example of Number of Monitoring Ports
Dell#show mon session
SessionID Source Destination Direction Mode Type
--------- ------ ----------- --------- ---- ----
0 TenGig 0/1 TenGig 0/9 rx interface Port-based
10 TenGig 0/2 TenGig 0/10 rx interface Port-based
20 TenGig 0/3 TenGig 0/11 rx interface Port-based
30 TenGig 0/4 TenGig 0/12 rx interface Port-based
Dell(conf)#
A source port may only be monitored by one destination port, but a destination port may monitor more
than one source port.
Dell Networking OS Behavior: All monitored frames are tagged if the configured monitoring direction is
transmit (TX), regardless of whether the monitored port (MD) is a Layer 2 or Layer 3 port.
Port Monitoring
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