独臂路由


对于使用单臂路由的网络,如:
SW1:
VLAN2: 主机A 10.1.2.2 255.255.255.0 10.1.2.1
VLAN3: 主机B 10.1.3.2 255.255.255.0 10.1.3.1
SW2:
VLAN4: 主机C 10.1.4.2 255.255.255.0 10.1.4.1
VLAN5: 主机D 10.1.5.2 255.255.255.0 10.1.5.1
3层SW or Router:
f0/0:
f0/0.1=>10.1.2.1
f0/0.2=>10.1.3.1
f0/1:
f0/1.1=> 10.1.4.1
f0/1.2=> 10.1.5.1
router 与 switch之间需要使用trunk链路!!
此时只要开启3层SW或ROUTER的路由功能IP ROUTING,即可自动实现VLAN间路由,不需单独配置路由协议。若关闭路由功能NO IP ROUTING,则无法实现。

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