Installation Manual

Connecting an FDDI Ring to the FDDI Interface

FDDI connections on HP routers use a dual-port FDDI interface with op-

tional node bypassing. Node bypassing is achieved by using an optical

bypass switch, also known as an “FDDI dual-switch module”. (For part

number, refer to the release notes you received with your router or most

recent software upgrade.) Using a bypass switch to connect your FDDI

ports to an FDDI network prevents the FDDI network ring from ‘‘wrap-

ping’’

in cases when your router is connected as a dual-attach station

(DAS) and powers down. FDDI operation requires HP router software

version 5.76 or later.

This subsection describes basic connections between the router and the

FDDI ring. For more information on cable configurations connecting the

HP Router BR to dual-attach and single-attach stations (DAS and SAS),

refer to appendix D, “FDDI Cable Attachment Configurations”.

For an illustration of ‘‘wrapping’’, refer to ‘‘FDDI Port (Router BR Only)’’ on page 2-11.

To determine the current version of software in your router, use the Stamp command in

the Network Control Language Interpreter (NCL). For more on NCL commands, refer to

the user’s guide you received with your router.

Installation

Phase 3: Prepare the Router Hardware

1-17