dhcp relay server-detect

Syntax

dhcp relay server-detect

undo dhcp relay server-detect

View

System view

Default level

2: System level

Parameters

None

Description

Use dhcp relay server-detect to enable unauthorized DHCP server detection.

Use undo dhcp relay server-detect to disable unauthorized DHCP server detection.

By default, unauthorized DHCP server detection is disabled.

With this function enabled, upon receiving a DHCP request, the DHCP relay agent will record from the request the IP addresses of all DHCP servers that ever offered IP addresses to the DHCP client and the receiving interface. Each server detected is recorded only once. The administrator can use this information from logs to check for unauthorized DHCP servers.

After information about recorded DHCP servers is cleared, the relay agent will re-record server information following this mechanism.

Examples

# Enable unauthorized DHCP server detection.

<Sysname> system-view
[Sysname] dhcp relay server-detect