Moseley Associates Inc EVENTHD ユーザーズマニュアル
2. System Description
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© 2007 Moseley, Inc. All Rights Reserved.
602-14886-01, Rev. A
Figure 2-7. Consecutive Point Network
2.72 + 0 (East-West) Configuration
The Event-HD supports a 2+0, or east-west, configuration that allows a consecutive point
architecture to be achieved with only a single 1 RU chassis at each location. In this
configuration the SDIDU
configuration the SDIDU
TM
contains two modems and may contain two power supplies.
One modem is referred to as the west modem and the other as the east modem. The
SDIDU
SDIDU
TM
is connected to two ODUs, one broadcasting/receiving in one directing of the
ring architecture and the other broadcasting/receiving in the other as shown in Figure
2-8.
2-8.
Figure 2-8. 2 + 0 (East West) Configuration
2.8Spanning Tree Protocol (STP)
Spanning Tree Protocol (STP) keeps Ethernet loops from forming in a ring architecture.
Without STP, loops would flood a network with packets. STP prevents loops by creating
Without STP, loops would flood a network with packets. STP prevents loops by creating
an artificial network break. In the event of a network outage, STP automatically removes
the artificial break, restoring connectivity.
the artificial break, restoring connectivity.