Port Mirroring
Diagnosing Switch Problems
page 24-12
OmniSwitch 6624/6648 Network Configuration Guide
April 2004
Creating a Mirroring Session
Before port mirroring can be used, it is necessary to create a port mirroring session. The
port mirroring
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
Chapter 6, “Assigning Ports
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
CLI command, and include the port mirroring session ID
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.
Содержание OmniSwitch 6624
Страница 1: ...Part No 060179 10 Rev C April 2004 OmniSwitch 6624 6648 Network Configuration Guide www alcatel com...
Страница 22: ...Contents xxii OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 174: ...Verifying 802 1Q Configuration Configuring 802 1Q page 9 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 264: ...Verifying the RIP Configuration Configuring RIP page 13 16 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 276: ...Verifying the RDP Configuration Configuring RDP page 14 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...