MikroTik v7.20.7(long-term)版ECMP多路径路由策略

推荐RouterOS v7版本7.16以上做ECMP等价多路径路由
一句话总结:
ECMP 就像把一条高速公路拆成多条并行车道,让数据包“各走各路”却又同时到达,既提速又容灾。
什么是 ECMP?
ECMP(Equal-Cost Multi-Path)指当路由器发现到同一目的地有多条“开销”完全相等的路径时,会把流量同时分摊到这些路径上。 它不是一种独立协议,而是一种本地转发策略,可与 OSPF、BGP 等路由协议无缝配合
创建路由表
/routing table
add name=ecmp_route fib
创建路由
/ip route
add dst-address=0.0.0.0/0 gateway=pppoe-out1 distance=1 routing-table=ecmp_route comment=ISP_LoadBalancedRoute
add dst-address=0.0.0.0/0 gateway=pppoe-out2 distance=1 routing-table=ecmp_route
add dst-address=0.0.0.0/0 gateway=pppoe-out3 distance=1 routing-table=ecmp_route
add dst-address=0.0.0.0/0 gateway=pppoe-out1 distance=1 routing-table=main comment=ISP_DefaultRoute
add dst-address=0.0.0.0/0 gateway=pppoe-out2 distance=2 routing-table=main
add dst-address=0.0.0.0/0 gateway=pppoe-out3 distance=3 routing-table=main
/ip route add dst-address=0.0.0.0/0 gateway=pppoe-out1 distance=1 routing-table=ecmp_route comment=ISP_LoadBalancedRoute add dst-address=0.0.0.0/0 gateway=pppoe-out2 distance=1 routing-table=ecmp_route add dst-address=0.0.0.0/0 gateway=pppoe-out3 distance=1 routing-table=ecmp_route add dst-address=0.0.0.0/0 gateway=pppoe-out1 distance=1 routing-table=main comment=ISP_DefaultRoute add dst-address=0.0.0.0/0 gateway=pppoe-out2 distance=2 routing-table=main add dst-address=0.0.0.0/0 gateway=pppoe-out3 distance=3 routing-table=main
注:路由前缀显示AS+ (+代表ECMP)
创建策略路由表
/routing rule
add action=lookup table=main disabled=no min-prefix=0
add action=lookup table=ecmp_route disabled=no src-address=192.168.8.0/24
注:1.解决内网IP段无法到达网关或与其它IP段无法互通问题
2.指定192.168.8.0/24段走ECMP路由策略
创建NAT伪装
/ip firewall nat
add chain=srcnat out-interface=pppoe-out1 action=masquerade comment="Src_A" place-before=0
add chain=srcnat out-interface=pppoe-out2 action=masquerade comment="Src_B" place-before=1
add chain=srcnat out-interface=pppoe-out3 action=masquerade comment="Src_C" place-before=2

参考地址:”ECMP等价多路径路由” 点击看看灵光怎么说 👉 https://www.lingguang.com/share/CHAT-646a0ab9-022b-468e-b8f3-ca2dce1f018771
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