Specifications

Hub Port Window
108
LICENSED MATERIAL - PROPERTY OF FUJITSU SOFTWARE TECHNOLOGY CORPORATION
Listed below are Port Control descriptions and possible field values.
Port Control Descriptions
Port Control Description
Auto The default port mode (and the default mode for an
unmanaged hub). The hub must be able to derive:
1. A valid clock
2. Valid Fibre Channel “K28.5” characters
3. No LIP(F8)s from the port’s receiver and the ability
to LIP(F7)
4. This prevents “rogue” ports from being inserted and
potentially disrupting the loop.
Forced
Bypass
This control is used to force a port into bypass mode and
can be used to selectively non-intrusively remove
devices from the loop while troubleshooting.
Forced Insert This control can be used to force an insertion of a port
into the loop, regardless of whether a valid clock or
“K28.5” character is derived from the port’s receiver.
WARNING: Use carefully as a “Forced Insert” can
cause the loop to go down if a device without valid
characters puts bad data onto the loop.
Loopback You can use this control to isolate a specific loop for
troubleshooting and fault isolation.
Loopback forces the port into “bypass” mode and routes
the ports receive signal back through the port’s
transmitter. Use Loopback to test the GBIC’s
transmitter/receiver circuitry and attached media from
the attached node.
Beacon Port Forces both port’s LEDs to flash on and off (beacon)
continuously to bring attention to the selected port. Use
to alert a remote technician to take action on a specific
port as identified by a Systems Administrator. The
blinking will override the state information display until
the beaconing is turned off.