BRIM-F6 Overview
1.3BRIM-F6 Overview
The BRIM-F6 is an FDDI Bridge Router Interface Module (BRIM) developed for use in Cabletron’s MMAC-FNB and MicroMMAC. The BRIM-F6 can be used to provide a high-speed uplink from lower speed networks such as Ethernet to a 100 Mbps FDDI backbone.
1.4BRIM-F6 Features
Connectivity
The BRIM-F6 is equipped with slots for FDDI A and B ports. These two ports allow connection to the ring as a Dual Attached Station (DAS) using two FPIMs or as a Single Attached Station (SAS) using one FPIM.
As a DAS, the MIM or hub that houses the BRIM-F6 connects directly to the FDDI main ring. This provides the reliability of an FDDI dual, counter-rotating ring topology. If one segment of the FDDI ring becomes disabled, this dual ring configuration provides redundancy and restores ring continuity.
As a SAS, the BRIM-F6 connects to the primary ring only by using a single FPIM on the BRIM-F6 to attach to the M port of an FDDI concentrator.
A dual homing configuration provides an additional redundancy feature for the MIM or hub containing the BRIM-F6. Dual homing is a way of connecting to an FDDI ring through the Master (M type) ports of two separate dual attached concentrators. If one M type port or one segment fails, the redundant port or segment activates automatically to retain connection to the ring.
For more information regarding DAS, SAS or dual homing configurations, refer to Appendix A, Basic FDDI Networks.
Bridging
The BRIM-F6 provides translational bridging between any channels or ports in its host MIM or hub and the FDDI ring.
BRIM-F6 User’s Guide | Page 1-3 |