Avaya P580 - Manual (Page 620)

19-8 Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Chapter
Setting Up Port Mirroring
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).