4000 Router Series Layer 3 - IP Services Command Reference

• Add newly released options.

• Add options for which the vendor defines the contents, for example, Option 43.

• Add options for which the CLI does not provide a dedicated configuration command. For example,

you can use the option 4 ip-address 1.1.1.1 command to define the time server address 1.1.1.1 f o r

DHCP clients.

• Add all option values if the actual requirement exceeds the limit for a dedicated option

configuration command. For example, the dns-list command can specify up to eight DNS servers.

To specify more than eight DNS server, you must use the option 6 command to define all DNS

servers.

If a DHCP option is specified by both the dedicated command and the option command, the DHCP

server assigns the content specified by the dedicated command. For example, if a DNS server address

is specified by the dns-list command and the option 6 command, the server uses the address specified

by dns-list command.

Examples

# Configure Option 7 to specify the log server address 2.2.2.2 in address pool 0.

<Sysname> system-view

[Sysname] dhcp server ip-pool 0

[Sysname-dhcp-pool-0] option 7 ip-address 2.2.2.2

Related commands

display dhcp server pool

reset dhcp server conflict

Use reset dhcp server conflict to clear IP address conflict information.

Syntax

reset dhcp server conflict [ ip ip-address ]

Views

User view

Predefined user roles

network-admin

Parameters

ip ip-address: Clears conflict information about the specified IP address. If no IP address is specified, this

command clears all address conflict information.

Usage guidelines

Address conflicts occur when dynamically assigned IP addresses have been statically configured for

other hosts. After the conflicts are resolved, you can use the reset dhcp server conflict command to clear

conflict information so that the conflicted addresses can be assigned to clients.

Examples

# Clear all IP address conflict information.

<Sysname> reset dhcp server conflict

Related commands

display dhcp server conflict