PCC的负载均衡事例.doc

PCC的负载均衡事例通分组源地址和源端口实现负载平衡，这里我们建立2个WAN出口分别是wan1和wan2，网络环境如下： ISP1地址10.200.15.99/24，网关：10.200.15.1； ISP2地址10.200.100.99/24，网关：10.200.100.2； 内网IP地址192.168.100.1/24； 启用DNS缓存功能，用192.168.100.1作内网DNS解析； 基本配置首先进入ip address配置IP地址：在ip dns setting中配置好DNS缓存，DNS为：61.139.2.69Mangle标记配置接下来我们进入ip firewall mangle标记连接和路由，我们使用per-connection-classifier双向地址进行分类做连接分类标记。首先我们需要将进入路由的的链接进行标记如下图，我们进入一条mangle规则，中的advanced标签内容可以看到per-connection-classifier分类器，选择both-addresses的分类：然后选择dst-address-type=!local，即除了目标地址是本地以前的地址：注：2条线的分类代码定义是第一条线为2/0，第二条为2/1同样选择一下地址类型：下面命令是提取走第一条线路的连接标记取名位1st_conn，并从连接里提取路由标记名位1st_route，设置：per-connection-classifier=both-addresses:2/0, 设置in-interface=lan/ip firewall mangleadd action=mark-connection chain=prerouting comment= disabled=no in-interface=lan new-connection-mark=1st_conn passthrough=yes per-connection-classifier=both-addresses:2/0add action=mark-routing chain=prerouting comment= connection-mark=1st_conn disabled=no in-interface=lan new-routing-mark=1st_route passthrough=yes提取走第二条线路的连接标记取名位2nd_conn，并从连接里提取路由标记名位2nd_route，设置：per-connection-classifier=both-addresses:2/1，设置in-interface=lan: /ip firewall mangleadd action=mark-connection chain=prerouting comment= disabled=no in-interface=lan new-connection-mark=2nd_conn passthrough=yes per-connection-classifier=both-addresses:2/1add action=mark-routing chain=prerouting comment= connection-mark=2nd_conn disabled=no in-interface=lan new-routing-mark=2nd_route passthrough=yes在winbox在mangle中设置完成后如下：回程路由设置我们需要将从那个口进入就从相应的口回去，即保证每个外网口的数据能得到正确的路由/ip firewall mangleadd chain=input in-interface=wan1 action=mark-connection new-connection-mark=1st_connadd chain=input in-interface=wan2 action=mark-connection new-connection-mark=2nd_connwinbox设置标记完进入接口的链接后，将这些链接指定到相应的路由标记上： add chain=output connection-mark=1st_conn action=mark-routing new-routing-mark=1st_routeadd chain=output connection-mark=2nd_conn action=mark-routing new-routing-mark=2nd_routewinbox设置路由配置配置完标记后路由后，我们进入ip route配置路由，首先设置负载均衡的标记路由，首先设置第一条线路的路由标记，设置routing-mark=1st_route：设置第二条线路的路由标记，设置routing-mark=2nd_route：配置默认网关和备份网关，默认网关的distance设置为1，并设置check-gateway=ping，通过ping监测网关状态:备份网关的distance设置为2，并设置check-gateway=ping，通过ping监测网关状态: 配置完成后的路由标如下图：配置nat最后配置nat转换规则，进入ip firewall nat中配置action=masquerade，分别对2条线路做伪装：/ip firewall natadd action=masquerade chain=srcnat out-interface=wan1add action=masquerade chain=srcnat out-interface=wan2命令代码如下：# 添加ADSL1的pppoe-out帐户密码并取取消自动添加网关及DNS/interface pppoe-client add name=pppoe-out1 interface=wan1 user=adsl1name password=adsl1pass add-default-route=no disabled=no/interface pppoe-client add name=pppoe-out2 interface=wan2 user=adsl2name password=adsl2pass add-default-route=no disabled=no# 激活pppoe-out拨号/interface pppoe-client enable pppoe-out1/interface pppoe-client enable pppoe-out2# 添加本地连接配置/ip address add address=192.168.1.254/255.255.255.0 interface=lan1 comment=LAN1# 设置DNS缓存/ip dns set primary-dns=202.103.224.68 secondary-dns=202.103.225.68 allow-remote-requests=yes# 设置MSS值为1440/ip firewall mangle add action=change-mss chain=forward comment=change-mss disabled=no new-mss=1440 protocol=tcp tcp-flags=syn# 设置input/ip firewall mangle add action=mark-connection chain=input comment= disabled=no in-interface=pppoe-out1 new-connection-mark=pppoe-out1_conn passthrough=yes/ip firewall mangle add action=mark-connection chain=input comment= disabled=no in-interface=pppoe-out2 new-connection-mark=pppoe-out2_conn passthrough=yes# 设置output/ip firewall mangle add action=mark-routing chain=output comment= connection-mark=pppoe-out1_conn disabled=no new-routing-mark=to_pppoe-out1 passthrough=yes/ip firewall mangle add action=mark-routing chain=output comment= connection-mark=pppoe-out2_conn disabled=no new-routing-mark=to_pppoe-out2 passthrough=yes# PCC设置/ip firewall mangle add action=mark-connection chain=prerouting comment= disabled=no dst-address-type=!local in-interface=lan1 new-connection-mark=pppoe-out1_conn passthrough=yes per-connection-classifier=both-addresses:2/0 src-address=192.168.1.0/24 /ip firewall mangle add action=mark-connection chain=prerouting comment= disabled=no dst-address-type=!local in-interface=lan1 new-connection-mark=pppoe-out2_conn passthrough=yes per-connection-classifier=both-addresses:2/1 src-address=192.168.1.0/24/ip firewall mangle add action=mark-routing chain=prerouting comment= connection-mark=pppoe-out1_conn disabled=no in-interface=lan1 new-routing-mark=to_pppoe-out1 passthrough=yes src-address=192.168.1.0/24/ip firewall mangle add action=mark-routing chain=prerouting comment= connection-mark=pppoe-out2_conn disabled=no in-interface=lan1 new-routing-mark=to_pppoe-out2 passthrough=yes src-address=192.168.1.0/24/ip route add comment=1 disabled=no distance=1 dst-address=0.0.0.0/0 gateway=pppoe-out1 routing-mark=to_pppoe-out1 check-gateway=ping /ip route add comment=2 disabled=no distance=1 dst-address=0.0.0.0/0 gateway=pppoe-out2 routing-mark=to_pppoe-out2 check-gateway=ping/ip route add check-gateway=ping comment=pppoe-out1 disabled=no distance=10 dst-address=0.0.0.0/0 gateway=pppoe-out1 /ip route add check-gateway=ping comment=pppoe-out2 disabled=no di