Cisco APP-LSS Установка и модернизация - Страница 23

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Step 3

Caution

maintain this relationship will prevent the FDDI interface from initializing. For the optical bypass

switch, PHY-A from the network goes to PHY-B on the switch, and PHY-B from the network goes

to PHY-A on the switch. Some signal degradation will occur with the optical bypass switch installed

in the FDDI ring.

Step 4

Testing the Installation

After you have installed your new FDDI module, verify the installation (before replacing the front

panel) by taking the following steps.

Caution

Apply power to the chassis only long enough to go through the conﬁguration dialog routine, check

LEDs, and verify proper system operation. Replace the front panel if it is necessary to leave on the

power to the chassis for some time.

Step 1

Note

Step 2

Step 3

Note

functions and show commands in depth.

Multimode connections—Attach the ﬁber-optic MIC cables from the FDDI network to the

PHY-A and PHY-B connectors on the applique. (See Figures 2 through 5.)

Single-mode connections—Attach the single-mode cables from the network to the

appropriate transmit (XMT) A or B and receive (RCV) A or B connections on the FDDI

applique.

Maintain the correct A-to-B and B-to-A relationship with the FDDI connectors. Failure to

Attach all other external cables to the appropriate applique connectors on the rear panel and

loosely place the top cover on the chassis. Leave the front panel off until you ﬁnish testing

the installation.

With the front panel removed and power on, the chassis is susceptible to overheating.

Turn ON the system power and allow the system to boot.

In order to test the microcode EPROM installation, step 2 is unnecessary.

Go through the conﬁguration dialog (or setup) routine to assign an address and subnet

mask to each new FDDI interface you have installed.

Observe the LED status indicators on the CCTL2 card and the FDDI applique, and then use

the EXEC show commands to verify that your interfaces are recognized and have been

assigned port (unit) addresses by the system.

In order to test the microcode EPROM installation, the following sections discuss the LED

Installing and Upgrading the CSC-C2FCIT FDDI Card and Appliques

Testing the Installation