Avaya 580 사용자 설명서

9-18

User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1

Chapter 9

Persistence

The persistence of the entry in the table can be set on all 
learned entries:

• Permanent - The address is not aged out of the table.

• Invalid - This entry is cleared from the table each time 

the switch resets.

• Ageout - Address is cleared from the address forwarding 

table when the timeout interval expires. This is the state 
of all entries dynamically learned by the switch. It 
ensures that MAC addresses that are not active on the 
network do not remain in the switch address forwarding 
table indefinitely.

If you create a static, filtered MAC address and set 

Persistence to Ageout, the switch does not filter the 
MAC address. The switch continues to forward 
frames that have the MAC address for a source 
address or destination address. To correct this, set 
Persistence to Permanent. 

Status

The status of the address entry.

Options include:

• Learned

• Management

• Self AFT Self Entries:

• 01:80:C2:00:00:00 - 01:80:c2:00:00:0F - 802.1D 

reserved addresses, the first entry is the Spanning Tree 
BPDU destination address.

• 09:00:4E:00:01:02 - 3Com Vlan Trunk (VLT) control 

frame address. Used for Spanning Tree blocked ports that 
are in 3Com tagging mode and connected to a port on the 
other side of a connection that is blocked by Spanning 
Tree. 

• 01:00:0C:CC:CC:CC - Cisco control frame. Used to 

synchronize VLAN membership across switches (VTPs) 
or router information between routers (CDPs). The 
switch sends them to the CPU, the CPU will set the 
BPDU bit when transmitting out a port trunking ISL. 

• 01:00:0C:DD:DD:DD - If Cisco Group Management 

Protocol (CGMP) is enabled, the switch may listen to 
gather multicast group information