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Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Table 6-4 Fields of a DHCP packet
OP
Hardware type
Hardware length
Hops
Transaction ID
Seconds
Flags
Client IP address
Your (client) IP
address
Server IP
address
Relay agent IP
address
Client hardware
address
Server host name
File
Options
Field
Length
1
1
1
1
4
2
2
4
4
4
4
16
64
128
Modifiable A modifiable option field, including packet type,
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Description
Packet type
1: a request packet
2: a reply packet
Hardware address type of a DHCP client
Hardware address length of a DHCP client
Number of DHCP hops passing by the DHCP packet
This field increases 1 every time the DHCP request
packet passes a DHCP relay.
A random number selected by the client to initiate a
request, used to identify an address request process
Duration after the DHCP request for the DHCP client,
fixed to 0, being idle currently
Bit 1 is the broadcast reply flag, used to mark that the
DHCP server response packet is transmitted in unicast
or broadcast mode.
0: unicast
1: broadcast
Other bits are reserved.
IP address of the DHCP client, only filled when the
client is in bound, updated or re-bound status, used to
respond to ARP request
IP address of the DHCP client assigned by the DHCP
server
IP address of the DHCP server
IP address of the first DHCP relay passing by the
request packet sent by the DHCP client
Hardware address of the DHCP client
Name of the DHCP server
Startup configuration file name and path assigned by the
DHCP server to the DHCP client
available lease period, IP address of the DNS server, IP
address of the WINS
6 DHCP
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