1-8To do… Use the command… RemarksDisplay the aging time of the dynamicMAC address entries in the MAC addresstabledisplay mac-address aging-timeDisplay the configured start port MACaddress display port-macConfiguration ExamplesAdding a Static MAC Address Entry ManuallyNetwork requirementsThe server connects to the switch through GigabitEthernet 1/0/2. To prevent the switch frombroadcasting packets destined for the server, it is required to add the MAC address of the server to theMAC address table of the switch, which then forwards packets destined for the server throughGigabitEthernet 1/0/2.z The MAC address of the server is 000f-e20f-dc71.z Port GigabitEthernet 1/0/2 belongs to VLAN 1.z Suppose the MAC address of a host is 000f-e235-abcd and belongs to VLAN 1. Because the hostonce behaved suspiciously on the network, you can add a blackhole MAC address entry for theMAC address to drop all packets destined for the host for security sake.Configuration procedure# Enter system view. system-view[Sysname]# Add a MAC address, with the VLAN, ports, and states specified.[Sysname] mac-address static 000f-e20f-dc71 interface GigabitEthernet 1/0/2 vlan 1# Add a black hole MAC address 000f-e235-abcd, with the VLAN and ports specified.[Sysname] mac-address blackhole 000f-e235-abcd interface GigabitEthernet 1/0/2 vlan 1# Display information about the current MAC address table.[Sysname] display mac-address interface GigabitEthernet 1/0/2Unit 1MAC ADDR VLAN ID STATE PORT INDEX AGING TIME(s)000f-e20f-dc71 1 Config static GigabitEthernet1/0/2 NOAGED000f-e235-abcd 1 Blackhole GigabitEthernet1/0/2 NOAGED000f-e20f-a7d6 1 Learned GigabitEthernet1/0/2 AGING000f-e20f-b1fb 1 Learned GigabitEthernet1/0/2 AGING000f-e20f-f116 1 Learned GigabitEthernet1/0/2 AGING--- 4 mac address(es) found on port GigabitEthernet1/0/2 ---
