LevelOne FGL-2870 - Manual (Page 627)

Mirror Port Commands
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• When mirroring traffic from a port, the mirror port and monitor port speeds
should match, otherwise traffic may be dropped from the monitor port. When
mirroring traffic from a VLAN, traffic may also be dropped under heavy loads.
• When VLAN mirroring and port mirroring are both enabled, the target port can
receive a mirrored packet twice; once from the source mirror port and again
from the source mirror VLAN.
• When mirroring traffic from a MAC address, ingress traffic with the specified
source address entering any port in the switch, other than the target port, will
be mirrored to the destination port.
• Spanning Tree BPDU packets are not mirrored to the target port.
• You can create multiple mirror sessions, but all sessions must share the same
destination port.
Example
The following example configures the switch to mirror received packets from port 6
to 11:
show port monitor
This command displays mirror information.
Syntax
show port monitor [interface | vlan vlan-id | mac-address mac-address]
• interface - ethernet unit/port (source port)
- unit - Stack unit. (Range: 1)
- port - Port number. (Range: 1-28/52)
• vlan-id - VLAN ID (Range: 1-4094)
• mac-address - MAC address in the form of xx-xx-xx-xx-xx-xx or
xxxxxxxxxxxx.
Default Setting
Shows all sessions.
Command Mode
Privileged Exec
Command Usage
When the source is a port, this command displays the destination port, source
port, and mirror mode (i.e., RX, TX, RX/TX). When the source is a VLAN, only
the destination port and source VLAN are displayed. When the source is a
MAC address, only the destination port and MAC address are displayed.
Console(config)#interface ethernet 1/11
Console(config-if)#port monitor ethernet 1/6 rx
Console(config-if)#