3com 2200 用户手册

The connectPolicy attribute is a bit string representing the connection 
policies in effect on a station. A connection’s type is defined by the types of 
the two ports involved (A, B, M, or S) in the connection. You can set the 
corresponding bit for each of the connection types that you want a 
particular station to reject. 

The Switch 2200 FDDI ports can be of type A or B. By default, all 
connections to the Switch 2200 FDDI ports are valid, except for M-M 
connections. The possible connections to reject and their corresponding 
bits are listed in Table 8-2.

tNotify

Timer used in the Neighbor Notification protocol to indicate the 
interval of time between the generation of Neighbor Information 
Frames (NIF). This value can be user-defined.

traceMaxExp

Maximum propagation time for a Trace on an FDDI topology. 
Places a lower bound on the detection time for an unrecovering 
ring.

Table 8-1   Description of Fields for FDDI Station Attributes  (continued)

Table 8-2   Bit to Set for Rejecting a Station Connection  

(Switch port - Remote port)

A-A

0

Undesirable peer connection that creates 
twisted primary and secondary rings; notify 
station management (SMT)

A-B

1

Normal trunk ring peer connection

A-S

2

Undesirable peer connection that creates 
a wrapped ring; notify SMT

A-M

3

Tree connection with possible redundancy. 
The node may not go to Thru state in 
Configuration Management (CFM). In a single 
MAC node, Port B has precedence (with 
defaults) for connecting to a Port M.

B-A

4

Normal trunk ring peer connection

(continued)