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SET TRUNK EXTERNAL_BEACON_ RECOVERY
SET TRUNK
EXTERNAL_BEACON_
RECOVERY
Use the SET TRUNK EXTERNAL_BEACON_RECOVERY command when using
8250 Token Ring modules with devices that do not support beacon recovery (for
example IBM 8228). Modules that do not support beacon recovery may cause a
multi-hub ring to segment at all trunk ports. To prevent this problem, set the
external beacon recovery parameter to non_exists for trunks connected to
devices that do not support beacon recovery.
This parameter informs the DMM that the connected device does not support
beacon recovery and enables the DMM to isolate the beaconing device. Failure
to designate a device that does not support beacon recovery can cause the
entire ring to segment if beaconing occurs on the remote device.
Format
Example
The following command assumes a 3822TR in slot 3 in one hub, configured in a
multi-hub ring, is connected to an 8228 (which does not have beacon recovery
capabilities). To prevent the ring from segmenting in the event the 8228
beacons, enter the following command:
CB5000> set trunk 3 ring_in.1 external_beacon_recovery non_exists
External beacon recovery set to non_exists.
Related Command
SHOW TRUNK
slot Hub slot 1 through 17.
ring_in
Specifies if the port is a Ring-In port.
ring_out
Specifies if the port is a Ring-Out port.
.trunk port 1 or 2 (required only on Model Number 3CB6210M-OFR).
setting
■
exists — Connected device supports beacon recovery.
■
non_exists (default) — Connected device does not support beacon
recovery.
set trunk
slot
ring_in
ring_out
external_beacon_recovery
.trunk port setting