Справочник Пользователя для Cabletron Systems 9A128-01

FDDI Management

4-6

Connection Policy

The SMT Connection Policy determines which types of connections are allowed 
among the four FDDI port types: A, B, M (Master), and S (Slave). FDDI protocol 
forbids Master—>Master connections; all other connection types are legal, 
although some are considered to be undesirable. 

The Connection Policy window, 

, lists potential connection types in a 

“Reject X-Y” format, where X represents the FDDI port on the selected module, 
and Y represents the attaching node. An X in the checkbox next to a Connection 
Policy indicates that the connection has been disallowed.

Figure 4-3. The Connection Policy Window

The following table summarizes the FDDI connection rules:

V —valid connection
X —illegal connection
U —undesirable (but legal) connection; this requires that SMT is notified.
P —valid, but when both A and B are connected to M ports (a dual-homing 

configuration), only the B connection is used.

Table 4-1. FDDI Connection Rules

A

V, U

V

V, U

V, P

B

V

V, U

V, U

V, P

S

V, U

V, U

V

V

M

V

V

V

X