Unicast Flood Blocking Configuration Guidelines; Configuring Unicast Flood Blocking On The Switch; Enabling Unicast Flood Blocking - Cisco WS-C6506 Software Manual

Unicast Flood Blocking Configuration Guidelines

Unicast Flood Blocking Configuration Guidelines
This section describes the guidelines for configuring unicast flood blocking:
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Configuring Unicast Flood Blocking on the Switch

These sections describe how to configure unicast flood blocking:
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When you are configuring unicast flood blocking, it is important to note that unicast flood blocking is
Note
given priority over other features (such as protocol filtering).

Enabling Unicast Flood Blocking

To configure the switch to drop the unicast flood packets on a port, you must disable unicast flood
blocking.
The port disables unicast flooding once the MAC address limit is reached.
Note
To enable unicast flood blocking, perform this task in privileged mode:
Task
Enable unicast flood blocking on the desired
Ethernet ports to disable unicast flooding.
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
45-2
Only the Ethernet ports can block the unicast flood traffic.
If the Ethernet port is part of an IPX network, you must manually enter a static CAM entry in the
CAM table before you disable unicast flood blocking on the port.
You cannot configure unicast flood blocking on the SPAN destination ports.
You cannot configure a SPAN destination on a unicast flood blocking port.
You cannot configure unicast flood blocking on a trunk port. If you attempt to configure unicast
flood blocking on a trunk port, you will see an error message.
You cannot configure unicast flood blocking on a port channel.
You cannot configure a port channel on a unicast flood blocking port.
Unicast flood blocking and GARP VLAN Registration Protocol (GVRP) are mutually exclusive.
You cannot configure the port to block the unicast flood packets and exchange VLAN configuration
information with the GVRP switches at the same time.
Enabling Unicast Flood Blocking, page 45-2
Disabling Unicast Flood Blocking, page 45-3
Displaying Unicast Flood Blocking, page 45-3
Chapter 45 Configuring Unicast Flood Blocking
Command
set port unicast-flood mod/port disable
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