3Com SuperStack II 9300 Command Reference Manual page 226

C 8: F D
226
HAPTER IBER
D I
ISTRIBUTED ATA NTERFACE
This
Connection
Is Rejected If This Bit Is Set
A-M 3
B-A 4
B-B 5
B-S 6
B-M 7
M-A 12
M-B 13
M-S 14
M-M 15
(FDDI)
Connection Rules
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.
Normal trunk ring peer connection.
Undesirable peer connection that creates
twisted primary and secondary rings; notify
SMT.
Undesirable peer connection that creates a
wrapped ring; notify SMT.
Tree connection with possible redundancy. The
node may not go to Thru state in CFM.
In a single MAC node, Port B has precedence
(with defaults) for connecting to a Port M.
Tree connection with possible redundancy.
Tree connection with possible redundancy.
Normal tree connection.
Connection that allows one system port to be
connected to another system port.