Monitoring and Analyzing Switch Operation
Traffic Mirroring
Syntax: mirror endpoint ip < src-ip > < src-udp-port > < dst-ip > < port-# >
no mirror endpoint ip < src-ip > < src-udp-port > < dst-ip >
< src-udp-port > : Must exactly match the < src-udp-port >
setting you will configure in the source switch for the re-
mote mirroring session the exit switch is being configured
to support. (The recommended range is 7933-65535.)
This setting associates the source mirroring session with
the desired mirror endpoint.by using the same, unique UDP
port number to identify a given mirroring session on a
source switch and the session’s corresponding destination
on a remote exit switch.
< dst-ip >: Must exactly match the < dst-ip > setting configured
in the source switch for the remote mirroring session the
exit switch is being configured to support.
< port-# > : Exit port for mirrored traffic from the specified
session. This is the port to which a traffic analyzer or IDS
should be connected.
Note: On the remote exit switch, the mirrored traffic entry
port for a given session and the exit port for that session
must belong to the same VLAN.
3. Configure the Mirroring Session on the Source Switch
For local mirroring, only a session number and a destination port number are
needed. (You also have the option of associating a name with the session
number.) Refer to “Configuring Mirroring with a Destination on the Local
(Source) Switch” below.
If the mirroring destination is on a remote switch instead of the local (source)
switch, then the traffic source IP address, the mirroring destination IP address,
and a unique (randomly selected) UDP port number are required for the
mirroring session. (Refer to page B-44.)
Configuring Mirroring with a Destination on the Local (Source)
Switch. For a given mirroring session on a source switch, use this command
to specify the exit port to use on the same switch. To create the mirroring
session itself, refer to the options under “1. Determine the Mirroring Session
Identity and Destination” on page B-41.
B-43
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