IBM 8239 Token-Ring Stackable Hub, Руководство по установке и эксплуатации

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supports a purge on insert process which, when enabled, causes the adapter to
clear out its receive buffers so that it can receive the frame from RPS. The default
value for “purge on insert” is enabled. To display the setting, use the DISPLAY
HUB terminal interface command. To change the setting, issue the
ENABLE/DISABLE PURGE_ON_INSERT terminal interface command.
Note: “Purge on insert” is not necessary and can be disabled whenever any of the
following conditions exists:
¹
There is no RPS present on the ring.
¹
There is an RPS on the ring and the RPS sends the Request
Initialization MAC Frame express-buffered. The 8239 Model 1 RPS
operates in this way so that when the Model 1 RPS is active, “purge on
insert” can be disabled.
Once a port is successfully inserted into the ring, the port status is changed to OK
and the port’s green status LED is changed to on.
Port Operational Status and Port LEDs
To display the port status, issue the DISPLAY PORT terminal interface command.
The values for the port status and the state of the port’s LEDs are as follows.
¹
Port administrative mode is enabled
– And phantom voltage is present
- Port status is OK when the port is successfully inserted. The green
LED is on; the yellow LED is off.
- Port status is BEACON WRAPPED when the port was detected to be
the source of beaconing. The green LED is off; the yellow LED is on.
- Port status is BCN THRES ERROR when the number of times the port
had a beacon fault exceeded the beacon threshold value. The green
LED is off; the yellow LED is blinking.
- Port status is SPEED MISMATCH when the port tried to insert at the
wrong speed. The green LED is off; the yellow LED is on.
- Port status is SPD THRES ERROR when the number of times the port
tried to insert at the wrong speed exceeded the speed mismatch
threshold value. The green LED is off; the yellow LED is blinking.
- Port status is SECURITY BREACH when a MAC address off of that
port was not configured in the Secure Address Table (refer to “Port
Security” on page 6-7 for details). The green LED is off; the yellow
LED is blinking.
Note: When the port status is BCN THRES ERROR, SPD THRES
ERROR, or SECURITY BREACH, the port is considered to be
permanently wrapped and cannot be inserted into the network again
until it is administratively re-enabled by issuing the ENABLE PORT
terminal interface command.
– And phantom voltage is not present
Port status is NO PHANTOM; the green LED is off and the yellow LED
is off.
¹
Port administrative mode is disabled
6-4
8239 Setup and User’s Guide