Alcatel Carrier Internetworking Solutions Switch/Router 用户手册

Page 17-9

The following section explains the fields displayed with the 

 command.

. The slot number (

), interface (port) number (

), type of service (

), and 

service instance (

). For example, a bridge service on port 1 of slot 3 would be:

Services provide connection options for switches in a LAN, between LANs, or in a WAN. 
Other possible services include trunking, routing, and LANE. It is possible to have more than 
one instance of a service if there are more than one connections on a single port.

. The learned MAC address for this port.

. The non-canonical version of the learned MAC address. The non-

canonical MAC address is different from a canonical MAC address in that the order in which 
the address information is sent is different. Ethernet uses canonical address, while other 
media (e.g., token ring, FDDI) use non-canonical.

. The protocol type of this MAC address. There are two possibilities:

Ethernet

FDDI

Token Ring

. The associated group ID for this learned MAC address.

. The index number to the Content-Addressable Memory (CAM), where the MAC 

addresses are stored, in hexadecimal form.

 The source of the MAC address (how it was learned). There are two possibilities:

Transparent Bridge

Source Route Frame. 

 The time in seconds since this MAC address was last seen on this port. 

. There are three possibilities for this column:

The configured ageing timer, in seconds, for this MAC address is shown. 
Once this time period is exceeded, the MAC address is removed from the 
CAM.

This MAC address was manually assigned to this group and will not age 
out.

This MAC address was learned on an optimized switch port and will not 
age out.

. The ATM Virtual Channel Identifier (VCI) for this MAC address entry. The VCI is 

shown for any media that uses Virtual Circuits (ATM, LANE).