Alcatel Carrier Internetworking Solutions Switch/Router 사용자 설명서

Page 17-31

The following section explains the fields displayed by the 

 command.

A number assigned as an identifier for the port.

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 value of the priority field contained in the first (in network byte order) octet of the (2 
octet long) Port ID. This value allows you to specify a particular port as more favorable if the 
bridge has more than one port connected in a loop. 

The contribution of this port to the path cost towards the spanning tree root bridge that 
includes this port. 802.1D-1990 recommends that the default value of this parameter be in 
inverse proportion to the speed of the attached LAN. Path cost is a measure of the distance of 
the listed port from the root bridge, in number of hops.

Whether or not spanning tree is enabled, either 

 or 

.

Transmit Functional Address. Values are:

Function Addresses are not applicable because this port is not using 
spanning tree.

Transmit Functional Address instead of normal Spanning Tree Multicast 
Address.

Transmit normal Spanning Tree Multicast Address. This is the default 
setting.