Troubleshooting Guide

Procedure
1. On the Device Physical View, select a port.
2. In the navigation tree, expand the following folders: Configuration > Edit > Port.
3. Click General.
4. Click the Interface tab.
5. In the Action section, select flushAll.
In a port context, all entries associated with the port are flushed. You can flush the ARP
entries and IP routes for a port. After you flush a routing table, it is not automatically
repopulated. The repopulation time delay depends on the routing protocols in use.
6. Click Apply.
Configuring port mirroring
Before you begin
• To change a port mirroring configuration, first disable mirroring.
About this task
Use port mirroring to aid in diagnostic and security operations.
Use port mirroring to make a copy of a traffic flow and send that copy to a device for analysis, for
example, for diagnostic sniffing. Use the mirror to see the packets in the flow without breaking into
the physical connection to place a packet onto the sniffer inline. You can also use port mirroring for
security. You can send flows to inspection engines for post processing.
Connect the sniffer (or other traffic analyzer) to the output port you specify in this procedure.
Procedure
1. In the navigation tree, expand the following folders: Configuration > Edit > Diagnostics.
2. Click General.
3. Click the Port Mirrors tab.
4. Click Insert.
5. To enable port mirroring for the instance, select the Enable check box.
6. Configure mirroring as required.
Note:
When you configure tx mode port mirroring on T-UNI and SPBM NNI ports, unknown
unicast, broadcast and multicast traffic packets that ingress these ports appear on the
mirror destination port, although they do not egress the mirror source port. This is
Configuring port mirroring
January 2017 Troubleshooting 129
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