154
Step Command
Remarks
2.
Set the DSCP value for DHCP
packets sent by the DHCP
client.
dhcp client dscp
dscp-value
By default, the DSCP value in DHCP
packets sent by the DHCP client is 56.
Display and maintenance commands for DHCP
client
Execute
display
command in any view.
Task Command
Display DHCP client information.
display dhcp client
[
verbose
] [
interface
interface-type
interface-number
]
DHCP client configuration examples
Example: Configuring DHCP client
Network configuration
As shown in
, Router B contacts the DHCP server through GigabitEthernet 1/0/1 to obtain
an IP address, a DNS server address, and static route information. The DHCP client's IP address
resides on subnet 10.1.1.0/24. The DNS server address is 20.1.1.1. The next hop of the static route
to subnet 20.1.1.0/24 is 10.1.1.2.
The DHCP server uses Option 121 to assign static route information to DHCP clients.
shows the Option 121 format. The destination descriptor field contains the following parts: subnet
mask length and destination network address, both in hexadecimal notation. In this example, the
destination descriptor is 18 14 01 01 (the subnet mask length is 24 and the network address is
20.1.1.0 in dotted decimal notation). The next hop address is 0A 01 01 02 (10.1.1.2 in dotted decimal
notation).
Figure 43 Option 121 format
Figure 44 Network diagram
Router B
DHCP Client
DNS server
Router A
DHCP server
GE1/0/1
10.1.1.1/24
GE1/0/1
Router C
10.1.1.2/24
20.1.1.2/24
20.1.1.1/24
