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Connection Policy 4-7
FDDI Management
Each device has its own connection policy; however, when two devices attempt to
connect, their combined established connection policies dictate the connections
that will be allowed. In an attempted connection between two nodes, the most
lenient policy will determine whether the connection (as long as it is legal) can be
made. For example, if two FDDI nodes attempt an A—>A connection, and this
connection is not allowed at one FDDI node but allowed at the other, the
connection would be accepted. If the connection policy at both nodes disallows
the connection, the connection will be rejected.
This is a read-only window; you currently cannot edit the connection policy via
SPECTRUM Element Manager.
TIP
You can use any SNMP Set Request or MIB tool to edit the Connection Policy for your
device by setting the fddimibSMTConnectionPolicy MIB OID (part of the MIB-II FDDI
Transmission MIB (RFC1512). fddimibSMTConnectionPolicy is simply a 16-bit integer
value (ranging from 32768 to 65535) that corresponds to the connection policy (in the
“Reject X-Y” format, where X represents a port on the FDDI Switch Module, and Y
represents the attaching node).
To set the connection policy for the device, total the bit values corresponding to
the desired connection policy according to the table below, and then use your SNMP
Set Request or Mib tool to set the value for the appropriate SMT index. For example,
to set a connection policy that disallowed the undesirable A-A or B-B connections
you would set the fddimibSMTConnectionPolicy MIB OID to 32,801:
32,768 (reject M-M, required) + 32 (reject B-B) + 1 (reject A-A).
Policy Power
reject A-A 2
0
(1)
reject A-B 2
1
(2)
reject A-S 2
2
(4)
reject A-M 2
3
(8)
reject B-A 2
4
(16)
reject B-B 2
5
(32)
reject B-S 2
6
(64)
reject B-M 2
7
(128)
reject S-A 2
8
(256)
reject S-B 2
9
(512)
reject S-S 2
10
(1,024)
reject S-M 2
11
(2,048)
reject M-A 2
12
(4,096)
reject M-B 2
13
(8,192)
reject M-S 2
14
(16,384)
reject M-M 2
15
(32,768 — a permanently set value for this bit)