40-2
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 40 Unknown Unicast and Multicast Flood Blocking
Configuring UUFB
Configuring UUFB
To configure UUFB or UFMB, perform this task:
This example shows how to configure UUFB on Fast Ethernet port 5/12 and how to verify the
configuration:
Router# configure terminal
Router(config)# interface fastethernet 5/12
Router(config-if)# switchport
Router(config-if)# switchport block unicast
Router(config-if)# do show interface fastethernet 5/12 switchport | include Unknown
Unknown unicast blocked: enabled
Tip For additional information (including configuration examples and troubleshooting information), see the
documents listed on this page:
http://www.cisco.com/en/US/products/hw/routers/ps368/tsd_products_support_series_home.html
Command Purpose
Step 1
Router# configure terminal
Enters global configuration mode.
Step 2
Router(config)# interface {{
type
1
slot/port
} |
{port-channel
number
}}
1. type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
Selects the interface to configure.
Step 3
Router(config-if)# switchport
Configures the port for Layer 2 switching.
Step 4
Router(config-if)# switchport block {unicast |
multicast}
Enables unknown unicast or multicast flood blocking
on the port.
Step 5
Router(config-if)# do show interfaces
[
type
1
slot/port
] switchport | include Unknown
Verifies the configuration.
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