Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Manual do Utilizador Página 65

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SNMP, RMON, BOOTP, DHCP, and RARP Concepts
114070 Rev. B 2-33
4. If a client does not receive a DHCPOFFER packet within a specified amount
of time after broadcasting a DHCPDISCOVER packet, it sends the packet
again. The client will rebroadcast the packet up to 10 times.
The client may receive DHCPOFFER packets from several potential servers.
If you configure the client to wait for multiple responses, it compares
configuration parameters in the DHCPOFFER packets to decide which server
to target.
F
igure 2-9 shows the second and third stages of the process.
Figure 2-9. Requesting and Receiving IP Information
5. When the client has chosen a target server, it broadcasts a DHCPREQUEST
packet. The DHCPREQUEST packet contains the address of the target server
in the server IP address field.
3. Target server transmits
DHCPACK or DHCPNAK
packet to BOOTP
relay
agent.
1. Client broadcasts
a DHCPREQUEST
packet.
4. BOOTP relay agent
transmits DHCPACK
or DHCPNAK
packet to client.
2. BOOTP relay agent
transmits DHCPREQUEST
packet to all servers
that supplied a
DHCPOFFER packet.
Router (BOOTP
relay agent)
Client
Server
SNM0006A
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