C
HAPTER
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| Interface Configuration
Trunk Configuration
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CONFIGURING TRUNK
MIRRORING
Use the Interface > Trunk > Mirror page to mirror traffic from any source
trunk to a target port for real-time analysis. You can then attach a logic
analyzer or RMON probe to the target port and study the traffic crossing
the source trunk in a completely unobtrusive manner.
Figure 52: Configuring Trunk Mirroring
CLI REFERENCES
â—† "Local Port Mirroring Commands" on page 761
COMMAND USAGE
â—† Traffic can be mirrored from one or more source trunks to a destination
port on the same switch.
â—† Monitor port speed should match or exceed source trunk speed,
otherwise traffic may be dropped from the monitor port.
â—† When mirroring trunk traffic, the target port must be included in the
same VLAN as the source trunk when using MSTP (see "Spanning Tree
Algorithm" on page 203).
â—† When mirroring VLAN traffic (see "Configuring VLAN Mirroring" on
page 193) or packets based on a source MAC address (see "Configuring
MAC Address Mirroring" on page 200), the target port cannot be set to
the same target port as that used for trunk mirroring by this command.
â—† When traffic matches the rules for both trunk mirroring, and for
mirroring of VLAN traffic or packets based on a MAC address, the
matching packets will not be sent to target port specified for trunk
mirroring.
PARAMETERS
These parameters are displayed:
◆ Source Trunk – The trunk whose traffic will be monitored.
(Range: 1-12)
◆ Target Port – The port that will mirror the traffic on the source trunk.
(Range: 1-26)
◆ Type – Allows you to select which traffic to mirror to the target port, Rx
(receive), Tx (transmit), or Both. (Default: Both)
WEB INTERFACE
To configure a local mirror session:
1. Click Interface, Trunk, Mirror.
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