Assigning A Mirror Port And Displaying The Current - Foundry Networks Switch and Router Installation And Configuration Manual

3. Click the Modify button next to the row for the table you want to change.
4. Enter the new value for the table size. The value you enter specifies the maximum number of entries the
table can hold.
5. Click Apply to save the changes to the device's running-config file.
6. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
7. Click on the plus sign next to Command in the tree view to list the command options.
8. Select the Reload link and select Yes when the Web management interface asks you whether you really want
to reload the software. Changes to table sizes do not take effect until you reload the software.
Assigning a Mirror Port and Monitor Ports
You can monitor traffic on Foundry ports by configuring another port to "mirror" the traffic on the ports you want to
monitor. By attaching a protocol analyzer to the mirror port, you can observe the traffic on the monitored ports.
You can monitor input traffic, output traffic, or both. Any port can operate as a mirror port.
Monitoring traffic on a port is a two-step process:
• Enable a port to act as the mirror port.
• Identify the ports on which the traffic is to be monitored (the monitor ports).
You can select multiple monitor ports but only one mirror port.
NOTE: A Chassis device can mirror only the in (receive) traffic across the backplane. Thus, if the mirror and
monitor ports are on different slots, only the in traffic appears on the mirror port.
USING THE CLI
EXAMPLE:
Suppose you want to diagnose the in and out traffic on port 3 on a module in slot 4 of a BigIron, and use port 1 in
slot 4 as the mirror port. To do so, enter the following:
BigIron(config)# mirror-port e 4/1
BigIron(config)# interface e 4/3
BigIron(config-if-4/3)# monitor both
Syntax: mirror-port ethernet <portnum>
NOTE: To monitor just the in traffic, enter "in" instead of "both" in the above command. To monitor only the out
traffic, enter "out" instead of "both" in the above command.
USING THE WEB MANAGEMENT INTERFACE
EXAMPLE:
Suppose you want to diagnose the in and out on traffic on port 3 on a module in slot 4 of a BigIron using port 1 in
slot 4. To do so:
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Select the Advance link to display the advanced system configuration panel.
3. Select the slot (if applicable) and port from the corresponding pulldown menus next to Mirror Slot. In this
example, select slot 4 and port 1.
4. Click Apply to save the changes to the device's running-config file.
5. Click on the plus sign next to Configure in the tree view to display the configuration options.
December 2000
Configuring Basic Features
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