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This appendix describes maintenance procedures you may need to perform on the 12- and 24-port hub port cards and management card. Router card maintenance procedures are described in the appendix "Router Card Maintenance."
Maintenance procedures for the router/hub include the following:
To change the hub port card options, you must remove the front cover of the router/hub as well as the hub port card, then set the switches. To change the management card ROM chips, you must remove the front cover, slide the management tray out of the chassis, then change the ROMs.
 | Warning Before working on the Cisco 2517 or Cisco 2519, turn OFF the power and unplug the power cord. Do not touch the power supply when the power cord is connected. Line voltages are present within the power supply even when the power switch is OFF and the power cord is connected. Do not work on the system or connect or disconnect cables during periods of lightning activity. Translated versions of this warning are in the appendix "Translated Safety Warnings." |
Before you can remove the hub port card or management tray, you must remove the front cover of the chassis. Perform the following steps to remove the front cover:
Step 1 Disconnect any cables attached to the hub port card, management card, or router card.
Step 2 Loosen the two captive screws that secure the plastic cover to the front of the chassis. (See Figure B-1.)
Step 3 Remove the front cover.
The hub port card DIP switches are used to set the Token Ring speed and other features. The jumper is used to set the port impedance, determined by the impedance of the cable you are using.
Figure B-2 shows the location of the switches on the 12-port hub card and Table B-1 describes the switches.
Figure B-3 shows the location of the switches on the 24-port hub card and Table B-2 describes the switches.
| Switch Number | Meaning | Default Setting |
|---|---|---|
| 1 | Sets the ring speed for the hub module:
On--16 Mbps Off--4 Mbps | On |
| 2 | Port 1 mode:
Off--Extension mode On--Lobe mode | On |
| 3 | Isolated or normal mode:
Off--Isolated mode On--Normal mode | On |
| 4 | Not used | Not used |
| Switch Number | Meaning | Default Setting |
|---|---|---|
| 1 | Sets the ring speed for the hub module:
On--16 Mbps Off--4 Mbps | On |
| 2 | Isolation mode:
Off--Entire module is isolated from the backplane ring On--Normal mode | On |
| 3 | Ports 1-12 isolated or normal mode:
Off--Ports 1-12 are isolated On--Ports 1-12 normal mode | On |
| 4 | Ports 13-24 isolated or normal mode:
Off--Ports 13-24 are isolated On--Ports 13-24 normal mode | On |
| 5 | Sets the Ring In port to repeater or MAU mode
Off--MAU mode On--Repeater mode | Off |
| 6 | Sets the Ring Out port to repeater or MAU mode
Off--MAU mode On--Repeater mode | Off |
Perform the following steps to remove the hub port card and change the DIP switch settings or port impedance jumper:
Step 1 Remove the plastic cover as described in the section "Removing the Front Cover" earlier in this appendix.
Step 2 Remove the two screws that secure the hub port module to the chassis. (See Figure B-4.)
Step 3 Grasp the extraction posts located on the card and pull forward until the card releases.
Step 4 Pull the card out and away from the chassis.
Step 5 Locate the DIP switches on the hub card. See Figure B-2 for the 12-port card, or Figure B-3 for the 24-port card.
Step 6 Set the switches for the desired options. See Table B-1 or Table B-2.
Step 7 Set the port impedance jumper. See Figure B-2 for the 12-port card, or Figure B-3 for the 24-port card.
Step 8 Slide the hub card back into the chassis.
Step 9 Secure the card with the screws you loosened in Step 2.
Step 10 Reinstall the front cover.
Perform the following steps to remove the management card tray and upgrade the management card ROMs:
Step 1 Remove the front cover of the chassis as described in the section "Removing the Front Cover" earlier in this chapter.
Step 2 Remove the four screws that secure the management card tray to the chassis. (See Figure B-5.)
Step 3 Grasp the extraction posts located on the card and pull forward until the card releases.
Step 4 Gently pull the tray out along the card guides. (See Figure B-6.)
Step 5 Locate the ROM chips on the management card. (See Figure B-7.)
Step 6 Use a screwdriver or chip extraction tool to remove the ROM chips.
Step 7 Carefully replace the ROM chips with the new version.
Step 8 Carefully slide the management card tray back into the chassis. Make sure the management card lines up with the card guides in the chassis.
Step 9 Secure the management card tray to the chassis with the screws you removed in Step 2.
Step 10 Replace the front cover.
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