Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 479)

Configuring Spanning Tree
Page 17-31
Field Descriptions
The following section explains the fields displayed by the stpc command.
Index
A number assigned as an identifier for the port.
Slot/Intf/Service/Inst
The slot number ( Slot ), interface (port) number ( Intf ), type of service ( Service ), and service
instance ( Inst ). For example, a bridge service on port 1 of slot 3 would be:
3/1/Brg/1
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.
Port Priority
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.
Path Cost
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.
Enable Spanning Tree
Whether or not spanning tree is enabled, either y or n .
tx FA
Transmit Functional Address. Values are:
NA Function Addresses are not applicable because this port is not using
spanning tree.
y Transmit Functional Address instead of normal Spanning Tree Multicast
Address.
n Transmit normal Spanning Tree Multicast Address. This is the default
setting.