ROS三層交換VLAN多網(wǎng)段DHCP中繼實現(xiàn)方案

1、  企業(yè)三層交換網(wǎng)絡(luò)(VLAN)+RouterOS+多網(wǎng)段dhcp中繼解決方案ROS + 三層交換vlan設(shè)置以RouterOS 2.9.27和H3C S5500為例 由上圖可知,現(xiàn)在交換機上劃分4個VLAN,每個VLAN的接口地址如上圖所示,現(xiàn)將交換機VLAN1接口與Ros路由LAN口相連,各VLAN通過VLAN1上網(wǎng)。（連接路由的端口為24端口，屬于默認的vlan 1中）一、ROS配置1. ROS內(nèi)網(wǎng)地址：192.168.1.254/242. NAT轉(zhuǎn)換ip / firewall / nat src-address=192.168.0.0/16 action=masquerade

2、3. 給ROS指回頭路由到三層交換機ip route add dst-address=192.168.1.0/24 gateway=192.168.1.1ip route add dst-address=192.168.2.0/24 gateway=192.168.1.1ip route add dst-address=192.168.3.0/24 gateway=192.168.1.1ip route add dst-address=192.168.4.0/24 gateway=192.168.1.1上面的這幾行 可以用下面這行代替 ip route add dst-address=192.

3、168.0.0/16 gateway=192.168.1.1二、H3C5500交換機配置sysSystem View: return to User View with Ctrl+Z.H3Cvlan 2           */依次創(chuàng)建vlan配置ip地址 默認的vlan1和路由同網(wǎng)段H3C-vlan2port g1/0/2H3C-vlan2int vlan 2H3C-Vlan-interface2ip add 192.168.2.1 24H3C-Vlan-interface2vlan 3H3C

4、-vlan3port g1/0/3H3C-vlan3int vlan 3H3C-Vlan-interface3ip add 192.168.3.1 24H3C-Vlan-interface3vlan 4H3C-vlan4port g1/0/4H3C-vlan4int vlan 4H3C-Vlan-interface4ip add 192.168.4.1 24H3Cip route 0.0.0.0 0.0.0.0 192.168.1.254   */配置缺省路由，下一跳到ros的lan口三、客戶機設(shè)置如客戶機不能上網(wǎng):檢查線路連接是否正確確?？蛻魴C設(shè)置的網(wǎng)關(guān)為其所屬VLAN的

5、IP地址，使用ping命令ping路由LAN口IP若不通，則交換機默認路由設(shè)置錯誤 *第二部分：Ros配置多vlan多網(wǎng)段dhcp中繼支持,每個vlan都能獲得相應(yīng)網(wǎng)段的ip1、 ip / pool 建立地址池Pools + Name:vlan2  address:192.168.2.100-192.168.2.200Name:vlan3  address:192.168.3.100-192.168.3.200Name:vlan4  address:192.168.4.100-192.168.4.2002、 ip / dhcp server 設(shè)置DHCP

6、 Server使其支持DHCP中繼DHCP  / SetupDHCP Server Interface :lan    DHCP Address Space:192.168.2.0/24Gateway for DHCP Network:192.168.2.1    DHCP Relay: 192.168.2.1Addresses to Give Out: 192.168.2.2-192.168.2.254DNS Server : 61.134.1.4（電信DNS）3、 在添加好的dhcp服務(wù)器上雙擊 name 依次改為 vl

7、an2 vlan3 vlan4Address pool 對應(yīng)選擇修改后如截圖_4、 交換機 H3C S5500SI配置方法：# 使能DHCP服務(wù)。<Sysname> system-viewH3C dhcp enable# 配置連接DHCP客戶端網(wǎng)絡(luò)的VLAN 2工作在DHCP中繼模式。H3C int vlan 2H3C-Vlan-interface2 dhcp select relay# 配置DHCP服務(wù)器的地址，并配置VLAN 2對應(yīng)DHCP服務(wù)器組1。H3C dhcp relay server-group 1 ip 192.168.1.254H3C int vlan 2H3C-Vlan-int