Avaya Configuring SNMP, RMON, BOOTP, DHCP, and RARP Services Manual do Utilizador Página 63

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SNMP, RMON, BootP, DHCP, and RARP Concepts
117362-A Rev. A 2-27
Figure 2-5. BootP Client and Server on Different Physical Networks
The client transmits a BOOTREQUEST packet to the IP broadcast address
(255.255.255.255). The router receives the BOOTREQUEST packet at an
interface that you configured to receive BOOTREQUEST packets (an input
interface). If the BOOTREQUEST packet has an address other than
255.255.255.255, the router drops the packet.
F
igure 2-6 shows the fields in the BOOTREQUEST and BOOTREPLY packets.
3. Server transmits
BOOTREPLY
packet to BOOTP
relay agent.
1. Client broadcasts
a request to boot from a
remote server
(BOOTREQUEST).
4. BOOTP relay
agent transmits
BOOTREPLY
packet to client.
2. BOOTP relay
agent transmits
BOOTREQUEST
packet to servers
on other networks.
Client
Server
Router (BOOTP
relay agent)
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