Avaya Configuring BOOTP Services Manual de usuario descargar pdf (Pagina 58)

Configuring SNMP, BootP, and DHCP Services

2-26

308644-15.1 Rev 00

Figure 2-10. Requesting and Receiving IP Information (DHCP Server)

When the client has chosen a target DHCP server, it broadcasts a

DHCPREQUEST packet to the server. The DHCPREQUEST packet contains

the address of the target server in the server IP address field.

The router configured as a DHCP server examines the packet, and if its IP

address differs from the value in the server IP address

field, it reclaims the IP

address it supplied in the DHCPOFFER packet. This address is now available

for other clients.

If the DHCPREQUEST packet is valid, the DHCP server forwards the request

information to the NetID Server Manager.

After the NetID Server Manager updates the NetID database with the new

request information, the NetID Server Manager sends a committed update

message back to the DHCP server.

Accepting or Declining IP Information

In a network configuration in which the router is configured as a DHCP server, the

target server recognizes its IP address in the server IP address field, and responds

to the DHCPREQUEST packet as follows:

3. NetID Server Manager updates

NetID database for IP address and

configuration parameters and sends

committed update message to DHCP server.

1. Client broadcasts

a DHCPREQUEST

packet.

4. DHCP server

transmits DHCPACK

or DHCPNAK

packet to client.

2. DHCP server transmits

information from

the DHCPREQUEST

packet to NetID Server

Manager.

Router (DHCP server)

NetID

Server

Manager

DC0002A

DHCP

client

DHCP

client

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Avaya Configuring BOOTP Services Manual de usuario Pagina 58

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