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Port Monitor Commands
78-20269-01 Command Line Interface Reference Guide
The analyzer port for port egress traffic mirroring should be the same port for all
mirrored ports.
The analyzer port for VLAN mirroring should be the same for all the mirrored
VLANs, and should be the same port as the analyzer port for port ingress mirroring
traffic.
Following are restrictions apply for ports that are configured to be source ports:
•
The port cannot be a destination port.
The following restrictions apply to ports that are configured to be monitor ports:
•
The port can't be source port.
•
The port isn't member in port-channel.
•
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.
The following restrictions apply to ports that are configured to be monitor ports:
•
The port cannot be source port.
•
The port is not a member in port-channel.
Notes:
1. 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.
•
Unknown Unicast packet sent to VLAN 3 will egress from port 4 twice, one
instance as normal forward and another instance 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 tagged and the other is
not).
2. When the port is configured to 802.1X auto mode it will forward any mirrored
traffic regardless of the.1X state. However, it will operate as a normal network
port (forward traffic) only after authorization is done.
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