¹
A parameter that is associated with a given port: You display this parameter by
issuing the DISPLAY PORT terminal interface command and looking at the
value of Traps. The default value is enabled. To change the value of the port’s
trap setting, issue the ENABLE/DISABLE PORT_SETTING TRAPS terminal
interface command. When the port’s trap setting is enabled, traps are sent
when the port goes up or down provided that the global TRAP_SETTING
PORT_UP_DOWN is also enabled. When the port’s trap setting is disabled,
traps are not sent when the port goes up or down, even if the global
TRAP_SETTING PORT_UP_DOWN is enabled.
For more information about traps, refer to “Trap Processing” on page 7-10.
Port Groups
The 8239 lets you assign one or more ports to a group. You can then issue a
single command to enable or disable a set of ports. The group can consist of any
ports in the stack. It also can be pre-configured with ports that will eventually be
part of the stack. A descriptive name is assigned to the group so that it can be
referenced by name. Ports can be added or removed selectively from the group.
The default setting has no groups defined. To set up a group, issue the following
terminal interface commands:
1. SET GROUP NAME to assign a name to a port group
2. SET GROUP PORT to assign ports to a port group
The following terminal interface commands are related to port groups:
¹
CLEAR GROUP NAME
¹
CLEAR GROUP PORT
¹
DISPLAY GROUP
¹
ENABLE/DISABLE GROUP
¹
SET GROUP NAME
¹
SET GROUP PORT
16-Port Expansion Feature
No configuration changes are needed when the port expansion card is used. Ports
on the 16-Port Expansion Feature have the same characteristics as the base set of
ports.
Inserting/Deinserting a Station
Before allowing a station to insert into the ring, the 8239 makes sure that the
following conditions are met:
¹
The port’s administrative mode is enabled
¹
Phantom voltage is present at the port or the port’s 8228_mode setting is
enabled
¹
The port’s counters have not exceeded either the beacon threshold value or the
speed-mismatch threshold value set for the hub
¹
The station connected to that port is running at the same ring speed as the hub
Some stations are unable to successfully insert into the ring when they are unable
to receive the ring parameters from the Ring Parameter Server (RPS) on the ring, if
present. In this state, the station’s adapter is in receive congestion state and cannot
complete its Open Adapter insertion process. To correct this problem, the 8239
Chapter 6. Concentrator Functions
6-3
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