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Configuring an RMON mirror port allows you to mirror traffic from a port or set of ports to a specific mirror port, where you can attach a sniffer or RMON probe. The switch supports a single mirror port and a single source port for each switch fabric port. For example, 20-port Fast Ethernet cards have two fabric ports (one for ports 1 through 10, one for ports 11 through 20). You can set up a single source port and a single mirror port for each set of ports associated with a fabric port. You can also choose to mirror all traffic from a particular fabric port to the mirror port, or set up multiple source ports to mirror traffic to a single mirror port.
Packets addressed to the CPU, such as pings, are duplicated out of the mirror port. Tagged packets that are sent into a source port with a VLAN ID to which the source port is not bound, are not transmitted out the mirror port. VLAN tag information is not propagated to the mirror port.
Note: To prevent unnecessary traffic flooding on a mirror port, put the mirror port on the same VLAN as the source port.
Two port mirroring features are available for the Avaya Multiservice switches: Fabric mode 1 port mirroring and Fabric mode 2 port mirroring. The switch must be in Fabric mode 2 to perform Fabric mode 2 port mirroring.
Fabric mode 1 port mirroring works with 50-series modules. Fabric mode 2 port mirroring works with 80-series modules.
Note: If you use port mirroring, the Frame Tags field on the Switch Port Configuration Web page for the port must be set to Use (default).
This section contains the following procedures:
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