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Port Mirroring
Remote Port Mirroring
Remote port mirroring is an extension to port mirroring which facilitates simultaneous mirroring
of multiple source ports on multiple switches across a network to one or more remote destination
ports.
Remote port mirroring involves configuration of the following port mirroring related parameters:
1.
Configuration of normal port mirroring source ports and one destination port on all switches,
as described above.
2.
Configuration of a mirror VLAN, which is a unique VLAN on which mirrored packets
traverse across the network. The mirror VLAN has to be configured on ALL switches across
the network along which mirrored traffic traverses, from the switch where the source ports
reside to the switch where the mirrored packets are sniffed and/or captured.
You must ensure that switches involved are properly configured to facilitate correct remote port
mirroring operation. The following points in particular need to be observed:
•
On the source switch, the correct destination port must be chosen to ensure that there is an
egress path from that port to the desired remote destination(s).
•
All ports on the path from the source port to the remote destination must be members of the
mirror VLAN.
•
On switches on the path from the source port to the remote destination, egress tagging has to
be enabled on potential egress ports for the mirror VLAN.
With the introduction of remote port mirroring:
•
Configured mirror destination ports will NOT lose their switching or routing properties as
they do on SecureStack A2, B2, or C2 products.
•
On switches where the mirror VLAN has been configured, any traffic on that VLAN will be
flooded on the VLAN. It will never be unicast, even if the source address of the traffic as been
learned on the switch.
Purpose
To review and configure port mirroring on the device.
Commands
For information about...
show port mirroring
set port mirroring
clear port mirroring
set mirror vlan
clear mirror vlan
5-30 Port Configuration
Note: This functionality is not supported on SecureStack A2, B2, or C2 products.
Refer to page...
5-31
5-31
5-32
5-32
5-33
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