A–1
A
Configuration Guidelines
This section presents general guidelines for installing a DECbridge unit or for trou-
bleshooting configuration problems.
A.1 General Guidelines
•
Ensure that the extended LANs connected to the IEEE 802.3/Ethernet ports
are properly configured for IEEE 802.1d and LAN Bridge 100 spanning tree
loop detection modes. This is especially important in networks that contain
bridges that are not manufactured by Digital Equipment Corporation. Refer to
the Bridge and Extended LAN Reference guide for further information.
•
Bridges are used to interconnect single-LAN segments into an extended
LAN. Each bridge starts a new single-LAN segment. The extended LAN can
have a maximum of seven levels of bridges.
A.2 Bridge-to-FDDI Guidelines
•
A SAS bridge can only be connected to the FDDI dual ring network through
a concentrator. Port 1 of a SAS bridge is an S port. Although an S port can be
legally connected to any type of FDDI port (A, B, M, or S), it is recom-
mended that Port 1 be connected to an M port on the DECconcentrator 500 (if
one is available). The connection is made through a fiber optic cable that
meets the specifications described in Chapter 4.
