Avaya Configuring IP Services Bedienungsanleitung PDF herunterladen (Seite 263)

100

101

Configuring EGP Services

6-3

Neighbor Acquisition Phase

This portion of EGP is responsible for forming neighbor relationships between

routers that are peers. Routers that are peers each have an interface to a common

network. One router attempts to acquire a peer router. If the peer agrees to be

acquired, the two routers form a neighbor relationship. They then negotiate the

mode of operation and the polling modes.

Certain messages that are used in the Neighbor Acquisition phase include the

following:

• Neighbor Acquisition Request

This is the message that one router sends to another to request the formation

of a neighbor relationship. The requesting router includes its

— Autonomous system number

— Acquisition mode

— Hello interval that it will accept from the peer

— Poll interval that it will accept from the peer

• Neighbor Acquisition Conﬁrm Response

This message is sent in response to a Neighbor Acquisition Request when the

router agrees to being acquired; that is, it is willing to form the neighbor

relationship. The responding router includes its

— Autonomous system number

— Acquisition mode

— Hello interval that it will accept from the peer

— Poll interval that it will accept from the peer

• Neighbor Acquisition Refuse Response

This message is sent in response to a Neighbor Acquisition Request when the

router does not agree to be acquired; that is, it will not form the neighbor

relationship. The status ﬁeld of the Neighbor Acquisition Refuse message

header supplies the reason for the refusal.

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