Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
6 DHCP
Raisecom Proprietary and Confidential
Copyright © Raisecom Technology Co., Ltd.
277
Table 6-4
Fields of a DHCP packet
Field
Length
Description
OP
1
Packet type
1: a request packet
2: a reply packet
Hardware type
1
Hardware address type of a DHCP client
Hardware length
1
Hardware address length of a DHCP client
Hops
1
Number of DHCP hops passing by the DHCP packet
This field increases 1 every time the DHCP request
packet passes a DHCP relay.
Transaction ID
4
A random number selected by the client to initiate a
request, used to identify an address request process
Seconds
2
Duration after the DHCP request for the DHCP client,
fixed to 0, being idle currently
Flags
2
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.
Client IP address
4
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
Your (client) IP
address
4
IP address of the DHCP client assigned by the DHCP
server
Server IP
address
4
IP address of the DHCP server
Relay agent IP
address
4
IP address of the first DHCP relay passing by the
request packet sent by the DHCP client
Client hardware
address
16
Hardware address of the DHCP client
Server host name 64
Name of the DHCP server
File
128
Startup configuration file name and path assigned by the
DHCP server to the DHCP client
Options
Modifiable A modifiable option field, including packet type,
available lease period, IP address of the DNS server, IP
address of the WINS