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Configuring Line Services

4-18

Parameter: Sync Priority

Default: 1

Range: 1 to 50

Function: Used by dial or switched services to assign priority to lines within the

same demand or backup pool. For example, the router uses a line of

priority 1 before it uses a line of priority 2.

Instructions: Assign a priority number to each line in the backup pool. The lower the

number, the higher the priority.

MIB Object ID: 1.3.6.1.4.1.18.3.4.5.1.97

Parameter: Sync B Channel Override

Reserved for future use.

Point-to-Point Addresses

According to convention, one end of a point-to-point circuit is designated DCE

and is assigned an address of 01; the other end of the circuit is designated DTE

and is assigned an address of 03.

Conventional addressing, however, is inadequate in the case of multiple

communication channels enabled by a common satellite link (F

igure 4-2). As

illustrated in F

igure 4-2, a common satellite relay link provides a virtual

point-to-point link between routers A and X, B and Y, and C and Z.

Conventional addressing designates routers A, B, and C as DCE (address = 01)

and routers X, Y, and Z as DTE (address = 03). If router A transmits a frame

across the virtual point-to-point circuit to X, X (the intended recipient), Y, and Z

all monitor the satellite broadcast. Because X, Y, and Z all perceive a properly

addressed frame, all three accept delivery and attempt to process the frame

contents, with unpredictable results.

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Avaya Configuring Line Services Manual de usuario Pagina 118