Avaya Connecting ASN Routers and BNX Platforms to a Network Manual de usuario Pagina 26

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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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