網(wǎng)絡(luò)基礎(chǔ)wlan第4章dhcpn手動(dòng)為局域網(wǎng)中大量主機(jī)配置IP地址掩碼網(wǎng)關(guān)等

ISSUE杭州通信技術(shù)置DHCP自動(dòng)配置避免了IP地 的問(wèn)課程目掌握DHCP原理和特熟悉DHCP協(xié)議中IP地址獲取過(guò)了解DHCP中繼的工作原DHCPDHCPDynamicHostConfigurationDHCP是從BOOTP（BootstrapProtocol）協(xié)議 DHCP→客戶端無(wú)須配置即能獲得IP地址及相關(guān)參數(shù)。簡(jiǎn)化客戶端網(wǎng) →所有IP地址及相關(guān)參數(shù)信息由DHCP服務(wù)器分→→通過(guò)使用DHCP中繼，可使處于不同子網(wǎng)中的客戶端DHCP服務(wù)器之間實(shí)現(xiàn)協(xié)議報(bào)文交DHCP系統(tǒng)組網(wǎng)絡(luò)

網(wǎng)絡(luò)

DHCP

DHCPDHCP→能提供DHCP功能的服務(wù)器或具有DHCP功能的網(wǎng)絡(luò)設(shè)DHCP中→DHCP→需要?jiǎng)討B(tài)獲得IP地址的主DHCP地址分配方根據(jù)需求，網(wǎng)絡(luò)管理員為某些少數(shù)特定的主機(jī)（如 →主機(jī)申請(qǐng)IP地址最常用的方法。DHCP服務(wù)器為客戶端IP地址動(dòng)態(tài)獲取過(guò) DHCPIP地 及釋 DHCP DHCP租約更 DHCP使用時(shí)間達(dá)到租期

使用時(shí)間達(dá)到租期

DHCP中繼工作原網(wǎng)絡(luò) 網(wǎng)絡(luò)

DHCP

DHCPDHCP廣播報(bào) DHCP單播報(bào)DHCP廣播報(bào) DHCP服務(wù)器基本配[Router]dhcp[Router]dhcp[Router]dhcp[Router]dhcpserverip-poolpool-[mask-length|maskmask配置為DHCP客戶端分配的網(wǎng)關(guān)地DHCP服務(wù)器可選配配置為DHCP客戶端分配的DNS服??[Router][Router]dhcpserverforbidden-iplow-ip-[high-ip-address[Router-dhcp-pool-0][Router-dhcp-pool-0]expired{dayday[hour[minuteminute]]|unlimitedDHCP服務(wù)器基本配置示DNSServer

DHCP[Router][Router]dhcp[Router]serverforbidden-ip192.168.1.10[Router]serverforbidden-ip192.168.1.254[Router]dhcpserverip-pool0[Router-dhcp-pool-0]network192.168.1.0mask[Router-dhcp-pool-0]expiredday5DHCP服務(wù)器顯示顯示DHCP地址池的可用地址信[Router][Router] ydhcp [Router]ydhcpserver[Router]ydhcpserverforbidden-DHCP中繼基本配[Router]dhcp[Router]dhcp配置DHCP服務(wù)器組中DHCP服務(wù)器的IP地[Router][Router]dhcprelayserver-groupgroup-idipip-配置接口工作在DHCP中繼模[Router-Ethernet1/1][Router-Ethernet1/1]dhcpselect配置接口與DHCP組關(guān)DHCP中繼配置示

DHCP

DHCP

[Router][Router]dhcp[Router]dhcprelayserver-group1ip[Router]interfaceethernet[Router-Ethernet1/1]dhcpselect[Router-Ethernet1/1]dhcprelayserver-selectDHCP中繼顯示顯示接口對(duì)應(yīng)的DHCP服務(wù)器組的信ydhcprelay{all|[Router]||allydhcprelayserver-group{group-[Router][Router]ydhcprelaystatistics[group{grou