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The figure below shows an example of a dual-homed ring application. Similar to the

single-homed example in the previous chapter, access to the STM-N network is

through two hosts. This may be preferable to the single-host application where

completing the STM-1 or STM-4 ring may be difficult due to geographical features. It

also provides protection against node failure through the second host node.

STM-64 Ring

STM-16 Ring

STM-4 Ring

365-312-801R7.2

Issue 3, May 2007

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HOST

NODE A

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STM-1 Ring or STM-4 Ring (

(only STM-1 Ring for

Metropolis

ADM

HOST

NODE B

Alcatel-Lucent - Proprietary

See notice on first page

Metropolis

AMS)

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)

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Dual-Homed Ring Application - Alcatel-Lucent 1643 AMS Applications And Planning Manual