单臂路由

SW1:

Vlan 10

Vlan 20

Int g0/0/1

Port link-type access

Port default vlan 10

Int g0/0/2

Port link-type access

Port default vlan 20

Int g0/0/5

Port link-type trunk

Port trunk allow-pass vlan 10 20

Int g0/0/10

Port link-type trunk

Port trunk allow-pass vlan 10 20

SW2:

Vlan 10

Vlan 20

Int g0/0/3

Port link-type access

Port default vlan 10

Int g0/0/4

Port link-type access

Port default vlan 20

Int g0/0/10

Port link-trunk trunk

Port trunk allow-pass vlan 10 20

R1:

interface GigabitEthernet0/0/0.10

dot1q termination vid 10

ip address 192.168.10.1 255.255.255.0

arp broadcast enable

#

interface GigabitEthernet0/0/0.20

dot1q termination vid 20

ip address 192.168.20.1 255.255.255.0

arp broadcast enable

单臂路由

原文：https://www.cnblogs.com/hehuanling/p/10048809.html