Cabletron Systems 7C03 사용자 설명서
FDDI Management
4-22
Configuring the SMT Connection Policy
Figure 4-10. SMT Connection Policy Window
FDDI Connection Rules
By default, all connections are allowed except the illegal M—>M connection; the
following table summarizes the FDDI connection rules:
following table summarizes the FDDI connection rules:
V
— valid connection
X
— illegal connection
U
— undesirable (but legal) connection
T
— connection can lead to a twisted ring configuration
DH — when both A and B are connected to M ports, a dual-homing configuration
results. See the following page for more information on dual homing.
Table 4-1. FDDI Connection Rules
A
B
S
M
A
V, U (T)
V
V, U
V, DH
B
V
V, U (T)
V, U
V, DH
S
V, U
V, U
V
V
M
V, DH
V, DH
V
X
!
CAUTION
Though technically legal under FDDI connection rules, the undesirable A—>S and
B—>S connections will deprive your device of the redundancy protection built in to the
FDDI dual-ring configuration. The SMT entity is notified each time an undesirable
connection is made, even when that connection is allowed.
B—>S connections will deprive your device of the redundancy protection built in to the
FDDI dual-ring configuration. The SMT entity is notified each time an undesirable
connection is made, even when that connection is allowed.