Avaya Connecting ASN Routers to a Network Bedienungsanleitung PDF herunterladen (Seite 24)

Connecting ASN Routers to a Network

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Obtaining the IP Address Automatically (EZ-Install)

During the EZ-Install process, the router obtains its address automatically, as

described below.

When you power on the ASN, it runs a set of diagnostic tests.

The ASN boots the

asn.exe

software image in local flash memory.

The ASN sends a BOOTP request to the upstream router for an IP

address and subnet mask.

The ASN issues the request through all synchronous ports at about the same

time, even if cables are not connected to these ports. Each port successively

tries the following protocols until it receives a response:

• Nortel Networks Standard HDLC (high-level data link control)

encapsulation

• Frame Relay Annex D

• Frame Relay Local Management Interface (LMI)

• Frame Relay Annex A

If the ASN does not receive a response it boots with the files in the local file

system, as described in the “Local Boot

” section later in this chapter.

The first interface on the upstream router to receive the BOOTP request

responds.

The upstream router calculates the IP address of the ASN’s synchronous

interface.

How the upstream router calculates the IP address depends on its protocol

configuration. See Step a if the upstream router circuit is running

Nortel Networks Standard or is a Frame Relay permanent virtual circuit

(PVC) in direct access mode. See Step b if it is a Frame Relay PVC in group

access mode.

A PVC in direct access mode or a Nortel Networks Standard

interface calculates the IP address by adding 1 to the IP address of

the interface that received the request.

For example, in Figure 1-1, the upstream router’s interface address is

192.32.1.1. This means that the upstream router calculates 192.32.1.2 as

the booting router’s IP interface.

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Avaya Connecting ASN Routers to a Network Bedienungsanleitung Seite 24