Cabletron Systems EMM-E6 Ethernet - Manual (Page 59)

CHAPTER 2: REQUIREMENTS / CONFIGURATIONS
2-12 EMM-E6 User’s Guide
2.5.4 A Fault Tolerant Wiring Hierarchy
The example in Figure 2-4 illustrates a fault tolerant wiring hierarchy.
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).
D
D
C
B
A
BRIDGE
Closet 1
A B C
A B C
BRIDGE
STAR HUB
A B C
BRIDGE
Closet 2
A B C
BRIDGE
Closet 3
D
D
D
D
MiniMMAC
CH1Book Page 12 Wednesday, March 20, 1996 7:48 AM