30
Refresh
Click this to update the information in the MAC table.
5.2.4.
Refusal (
Black-hole MAC)
5.2.4.1.
Introduction
This type of MAC address entries are configured manually. A switch discards the packets
destined for or originated from the MAC addresses contained in blackhole MAC address entries.
Blackhole entries are configured for filtering out frames with specific source or destination MAC
addresses
Notice:
User can configure up to 20 entries.
5.2.4.2.
CLI Configuration
Node
Command
Description
enable
show mac-address-table
refusal
This command displays the current refusal MAC
address only.
configure mac-address-table refusal
MACADDR vlan
VLANID
This command configures a refusal MAC on a
specific VLAN.
configure mac-address-table refusal
MACADDR
This command configures a refusal MAC.
Example:
The procedures to configure a refusal MAC address
✓
To enter the configure node.
L2SWITCH#configure terminal
L2SWITCH(config)#
✓
To configure a refusal MAC address for all ports and all vlans.
L2SWITCH(config)#mac-address-table refusal 00:11:22:33:44:55
✓
To configure a refusal MAC address for all ports on a specific vlan.
L2SWITCH(config)#mac-address-table refusal 00:11:22:33:44:55 vlan 1.