3Com CoreBuilder 5000, Руководство пользователя

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2-16 D
ESIGNING AND
E
XPANDING THE
N
ETWORK
This section describes the ring assignments illustrated in Figure 2-2 .
Ring 1 Description
The end nodes on Ring 1 attach to Active Per Port Switching Modules
in the floor 3 hub. The following is a list of assignments for Ring 1:
■
Each port on Ring 1 is assigned to the CoreBuilder 5000 hub’s
backplane Token Ring 1 network.
■
A set of Ring-In/Ring-Out ports, also assigned to backplane Token
Ring 1, extends the ring through the vertical riser to the master hub
on floor 1.
■
The attached Ring-In/Ring-Out ports on the Dual Fiber Repeater
Module on floor 1 are assigned to the same backplane network as
the server for Ring 1. This connects the Ring 1 file server to the Ring
1 end nodes.
Ring 2 Description
Ring 2 works the same way Ring 1 works. Ring 2 uses the second set
of Ring-In/Ring-Out ports on the Dual Fiber Repeater Module on the
third floor to extend the ring down the vertical riser.
The Ring 2 file server is attached to the same Active Per Port Switching
Media Module as the Ring 1 file server. This is possible because you can
switch any port on either the Dual Fiber Repeater Module or the Active
Per-Port Switching Module to any of 10 backplane Token Ring
networks.
Ring 3 Description
Ring 3 works the same way as Rings 1 and 2.
The second set of Ring-In/Ring-Out ports on the Dual Fiber Repeater
Module on floor 2 attach an IBM 8230 Multistation Access Unit (MAU)
to the ring. A Token Ring Jitter Attenuator Card installed on the Dual
Fiber Repeater Module ensures compatibility with the external 8230
MAU.