[0.0.0.0] DHCP: Client IP address = [0.0.0.0] DHCP: Next Server to use in bootstrap = [0.0.0.0] DHCP:Relay Agent = [192.168.1.1]DHCP:Client hardware address = 0005DCF2C441DHCP: DHCP: Host name = "" DHCP: Boot file name = "" DHCP: DHCP: Vendor Information tag = 63825363 DHCP...
We configure a DHCP relay agent only on the interface that is directly connected to a local subnet. In this network, four interfaces are directly connected to the local subnets. These interfaces are the following. To configure the above-listed interfaces as DHCP relay agents, use the'ip helper...
the relay agent creates a new unicast packet sourced from the interface where the DHCP Discover was received and destined to the IP Address as defined in theip helper-addressconfiguration. After the packet is created it is hardware forwarded and sent to the DHCP Server whe...
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...
The Cisco IOS XE DHCP relay agent supports the use of unnumbered interfaces. An unnumbered interface can “borrow” the IP address of another interface already configured on the router, which conserves network and address space. For DHCP clients connected though the unnumbered interfaces, the DHCP ...
VIII. 当前主流的Cisco交换机基本都支持DHCP Snooping功能。 三、DHCP Option 82 当DHCP服务器和客户端不在同一个子网内时,客户端要想从DHCP服务器上分配到IP地址,就必 须由DHCP中继代理(DHCP Relay Agent)来转发DHCP请求包。DHCP中继代理将客户端的DHCP报文 ...
dhcp&dhcp relay agent 课程提纲 DHCP/DHCPRelay原理原理常用配置指令典型案例 ©1999,CiscoSystems,Inc.www.cisco.com ICND—6-1 DHCP的产生背景的产生背景 DHCP服务器 DHCP客户端DHCP客户端 DHCP客户端DHCP客户端 DHCP客户端 同一广播域 DHCP的全称是动态主机配置协议（DynamicHostConfigurationProtocol），由rfc2131...
当前主流的Cisco交换机基本都支持DHCP Snooping功能。三、DHCP Option 82当DHCP服务器和客户端不在同一个子网内时,客户端要想从DHCP服务器上分配到IP地址,就必须由DHCP中继代理(DHCP Relay Agent)来转发DHCP请求包。DHCP中继代理将客户端的DHCP报文转发到DHCP服务器之前,可以插入一些选项信息,以便DHCP服务器能更精确...
To rectify this, we can configure R1 to act as a DHCP relay agent and forward the DHCP requests to the configured DHCP server. This is done by issuing the ‘ip helper-address DHCP_SERVER_IP_ADDRESS’ command on its Gi0/0 interface. This command instructs the router to do the following...
称为Relay agent IP address的字段,这个字段只要DHCP请求数据包被中继后便会自动添加此字段,中继路由器会在里面的写上参数,这个参数,就是告诉服务器,客户端需要哪个网段的IP地址才能正常工作。中继路由器从哪个接口收到客户的DHCP请求,就在Relayagent IP address位置写上该接收接口的IP地址,然后服务器根据Relayagent ...