port monitor

This command configures a mirror session. Use the
no
form to clear a mirror
session.
Syntax
port monitor interface [rx | tx | both]
no port monitor interface
• interface - ethernet unit/port (source port)
- unit - Stack unit. (Range: 1-8)
- port - Port number. (Range: 1-26/50)
• rx - Mirror re ceive d packe ts.
• tx - Mirror transmitted packets.
• both - Mirror both received and t ransmi tted p ac kets .
Default Setting
No mirror session is defined. When enabled, the default mirroring is fo r both
received and transmitted packets.
Command Mode
Interface Configuration (Ethernet, destination port)
Command Usage
• You can mirror traffi c from an y source port to a destin ation port for real-ti me
analysis. You can then attach a logic analyzer or RMO N probe t o the
destination port and study the traffic crossing the source port in a comp lete ly
unobtrusive manner.
• The destinatio n port is set by sp ecifying an Ethernet in terface.
• The mirror port and monitor port speeds should match, ot herw ise traffic may
be dropped from the monitor port.
• You can create multiple mirror sessions, but all sessions must share the same
destination port. However, you should avoid sen ding too much traffic t o the
destination port from multiple source ports.

29-1

Command Function
port monitor Configures a mirror session
show port monitor Shows the configuration for a mirror port
Mode Page
IC 29-1
PE 29-2
Chapter 29: Mirror Port Commands
This section describes how to mirror traffic from a so urce port to a targ et port.
Table 29-1 Mirror Port Commands