Configuration Guide DHCP Relay Configuration
different privileges. The Circuit ID is in the following format, where the privilege
and vid fields respectively have two bytes:
2. relay agent information option82: This option can be used without running
other protocol modules. During DHCP relay, the device forms option82
information according to the port that receives the DHCP request message and
the physical IP address of the device itself, and uploads the option82 information
to the DHCP server. The option is in the following format:
Agent Circuit ID
Agent Remote ID
Understanding DHCP relay Check Server-id Function
When the DHCP is used, generally multiple DHCP servers are configured for a
network for the purpose of backup, so that the network will continue to work
even if a server fails. During the four interaction processes of DHCP acquisition,
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