Dell PowerEdge VRTX - Manual (Page 454)

454 Port Monitor Commands
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2+3\new_system_mifs_ARC2_latest\Port_Monitor.fm
D E L L C O N F ID E N T IA L – P R E L IM I N A RY 4 / 3 /1 4 - FO R P R O O F O N LY
Source ports cannot be destination ports at the same time.
The following restrictions apply to ports that are configured to be monitor
ports:
• The port is not a member in a port-channel.
• An IP interface is not configured on the port.
• GVRP is not enabled on the port.
• The port is not a member in any VLAN, except for the default VLAN (will
be automatically removed from the default VLAN).
• L2 protocols, such as: LLDP, CDP, LBD, STP, LACP, are not active on the
destination port.
Note the following:
• In this mode some traffic duplication on the analyzer port may be
observed. For example:
–
Port 2 is being egress monitored by port 4.
– Port 2 & 4 are members in VLAN 3.
– An unknown unicast packet sent to VLAN 3 will egress from port 4
twice, once as normal forward and another time as mirrored from port
2.
– Moreover, if port 2 is an untagged member in VLAN 3 and port 4 is a
tagged member then both instances will look different (one is tagged
and the other is not).
• When the port is configured to 802.1X auto mode, it will forward any
mirrored traffic regardless of the 802.1X state. However, it will operate as a
normal network port (forward traffic) only after authorization is done.
• Mirrored traffic is exposed to the STP state, i.e. if the port is in STP
blocking, it will not egress any mirrored traffic.
Example
The following example copies traffic for both directions (Tx and Rx) from the
source port gi0/2 to destination port gi0/1.
console(config)# interface gi0/1
console(config-if)# port monitor gi0/2