Cabletron Systems EMM-E6 Ethernet manual Fault Tolerant Wiring Hierarchy

CHAPTER 2: REQUIREMENTS / CONFIGURATIONS

2.5.4A Fault Tolerant Wiring Hierarchy

The example in Figure 2-4 illustrates a fault tolerant wiring hierarchy.

D	D
	C
	B
	A

MiniMMAC

D

D	Closet 1
D	BRIDGE
STAR HUB	A B	C
BRIDGE	D
A B C	Closet 2
	BRIDGE
Closet 3	A	B C
BRIDGE
A B	C

Figure 2-4. Configuring a Fault Tolerant Wiring Scheme

Closets 1, 2, and 3 each contain an MMAC-FNB with an EMM-E6, MIMs, and RIC MIMs operating on Ethernet channels A, B, and C. Within each closet, each Ethernet channel is separately repeated, and each is dedicated to a specific set of network users (for example, Ethernet A contains Novell users, Ethernet B contains TCP/IP and NFS users, and Ethernet C contains DECnet users).

2-12 EMM-E6 User’s Guide