In such a situation, you need to configure the router's interface connected to the DHCP server as a DHCP relay agent. To configure a router's interface as a DHCP relay agent, use the following command in interface configuration mode. Router(config-if)#ip helper-address [ip-address-of-the...
When a router forwards these address assignment/parameter requests, it is acting as a DHCP relay agent. The Cisco router implementation of the DHCP relay agent is provided via the ip helper-address interface configuration command. In Figure 1, the DHCP client broadcasts a request for an IP ...
The dhcp relay information option with vpn sub-option must be enabled for this command configuration to work. To enable VRF support for the DHCP relay agent, use the ip dhcp relay information option vpn command. For more details about the ip dhcp relay ...
The second DHCP relay agent unicasts the DHCP packet to the DHCP server. The DHCP server receives the packet and uses the VPN suboption information from the second relay agent, along with the option 82 information from the first relay agent, to assign IP addresses and other configuration param...
DHCP依赖广播机制运作,当DHCP客户端与服务器在同一物理网段时,可以正常工作;若不在同一网段,广播包无法传递给服务器,此时需要配置DHCP中继代理(Relay Agent)。 DHCP中继代理会将客户端的广播包改成单播包,这样客户端的消息就可以在IP网络中路由,直到抵达服务器。需要注意的是,各节点必须拥有到达服务器的路由信息,才能...
Verifying the DHCP Relay Agent Configuration Procedure Run thedisplay dhcp relay{all|interfaceinterface-typeinterface-number} command to view information about the DHCP server or DHCP server group on the interface functioning as a DHCP relay agent. ...
NAT Configuration UDP Helper Configuration IP Performance Configuration Basic IPv6 Configuration DHCPv6 Configuration IPv6 DNS configuration IPv6 over IPv4 Tunnel Configuration IPv4 over IPv6 Tunnel Configuration Configuring a DHCP Relay Agent Enabling DHCP Enabling the DHCP Relay Function Specifying the...
[2] Droms, R., "Dynamic Host Configuration Protocol", RFC 2131, March 1997.[3] Patrick, M., "DHCP Relay Agent Information Option", RFC 3046, January 2001.[4] Kinnear, K., Normoyle, M., and M. Stapp, "The Dynamic Host Configuration Protocol Version 4 (DHCPv4) Relay Agent Flags ...
Access configuration. The DHCP Relay Agent in the Windows Server 2003 family must be configured with the IP address of the DHCP server in order to relay DHCP requests between Subnet A and Subnet B. For more information about setting up the DHCP Relay Agent, seeConfigure the DHCP Relay Agent...
How relay agents work Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2 A relay agent is a small program that relays DHCP/BOOTP messages between clients and servers on different subnets. DHCP/BOOTP relay agents are part of the...