Avaya Connecting ASN Routers and BNX Platforms to a Network Instrukcja Użytkownika Pobierz pdf (Strona 26)

Connecting ASN Routers and BNX Platforms to a Network

1-6

Obtaining the IP Address Automatically (EZ-Install)

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

described below.

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

2. The ASN boots the asn.exe software image in local ﬂash memory.

3. 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:

• Bay 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.

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

responds.

5. 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 Bay

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. A PVC in direct access mode or a Bay 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 and BNX Platforms to a Network Instrukcja Użytkownika Strona 26