Creating A Mirroring Session; Unblocking Ports (Protection From Spanning Tree) - Alcatel OmniSwitch 6624 Network Configuration Manual
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- Troubleshooting manual (614 pages) ,
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- Network configuration manual (654 pages)
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Port Mirroring
Creating a Mirroring Session
Before port mirroring can be used, it is necessary to create a port mirroring session. The
source destination
CLI command can be used to create a mirroring session between a mirrored (active)
port and a mirroring port. One port mirroring session is supported per OmniSwitch 6624 in a stack and up
to two port mirroring sessions are supported per OmniSwitch 6648 in a stack.
Note. To prevent the mirroring (destination) port from being blocked due to Spanning Tree changes, be
sure to specify the VLAN ID number (from 1 to 4094) for the port that will remain unblocked (protected
from these changes while port mirroring is active). This parameter is optional; if it is not specified,
changes resulting from Spanning Tree could cause the port to become blocked (default). See Unblocking
Ports (Protection from Spanning Tree) below for details.
To create a mirroring session, enter the port mirroring source destination command, and include the
port mirroring session ID number and the source and destination slot/ports, as shown in the following
example:
-> port mirroring 6 source 2/3 destination 2/4
This command line specifies mirroring session 6, with the source (mirrored) port located in slot 2/port 3,
and the destination (mirroring) port located in slot 3/port 4.
Note. Neither the mirrored nor the mirroring ports can be a mobile port. See
to VLANs,"
for information on mobile ports.
Unblocking Ports (Protection from Spanning Tree)
If the mirroring port will monitor mirrored traffic on an RMON probe belonging to a different VLAN than
the mirrored port, it should be protected from blocking due to Spanning Tree updates. To create a mirror-
ing session that protects the mirroring port from being blocked (default) due to changes in Spanning Tree,
enter the
port mirroring source destination
number, source and destination slot/ports, and unblocked VLAN ID number, as shown in the following
example:
-> port mirroring 6 source 2/3 destination 2/4 unblocked 750
This command line specifies mirroring session 6, with the source (mirrored) port located in slot 2/port 3,
and the destination (mirroring) port located in slot 2/port 4. The mirroring port on VLAN 750 is protected
from Spanning Tree updates.
Note. If the unblocked VLAN identifier is not specified, the mirroring port could be blocked due to
changes in Spanning Tree.
page 24-12
CLI command, and include the port mirroring session ID
OmniSwitch 6624/6648 Network Configuration Guide
Diagnosing Switch Problems
port mirroring
Chapter 6, "Assigning Ports
April 2004
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