Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál stáhnout pdf (Strana 47)

SNMP, BootP, DHCP, and RARP Concepts

303542-A Rev 00

2-17

Figure 2-6. Fields in a DHCP Packet

2. DHCP servers may respond with a DHCPOFFER packet that includes an

available IP address in the IP address field.

When a DHCP server offers an IP address, that address is temporarily

unavailable to other clients. If the client does not accept or reject the address

within a certain period of time, the server reclaims it. The address is then

available for other clients.

3. The BootP relay agent receives the DHCPOFFER packet and examines the

packet. If the BootP relay agent accepts the packet, it forwards it to the client.

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.

Transaction ID (4)

Seconds (2)

Flags (2)

Client IP address (4)

Your IP address (4)

Server IP address (4)

Gateway IP address (16)

Client hardware address (16)

Server name (64)

File name (128)

Options (312)

Operation (1)

Hardware type (1)

Hardware address

length (1) Hops (1)

The number in parentheses indicates the number of octets in each field.

SNM0004A

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 145 146

Žádné komentáře

Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 47