20201223 cisco 單臂路由

課堂資料

單臂路由器：是指與網路有單一物理或邏輯連接的路由器。

它通常用於在本地連接的主機之間轉發獨立邏輯路由域上的流量，或者方便路由表的管理、分發和中繼。

課堂練習

單臂路由

VPC3

ip 192.168.10.1/24

設定 Gateway

ip 192.168.10.1 255.255.255.0 192.168.10.254

ping 192.168.10.254

ping 192.168.20.254

ping 192.168.20.1

VPC4

ip 192.168.20.1/24

設定 Gateway

ip 192.168.20.1 255.255.255.0 192.168.20.254

ping 192.168.10.254

ping 192.168.20.254

ping 192.168.10.1

SW

vlan 10

vlan 20

do sh vlan brief

int e0/1

switchport mode access

switchport access vlan 10

int e0/2

switchport mode access

switchport access vlan 20

do sh vlan brief

int e0/0

設定 trunk 的 encapsulation

switchport trunk encapsulation dot1q

switchport mode trunk

do sh run

R2

int e0/0

no shut

int e0/0.10

encapsulation dot1Q 10

ip add 192.168.10.254 255.255.255.0

no shut

int e0/0.20

encapsulation dot1Q 20

ip add 192.168.20.254 255.255.255.0

no shut

do sh run

VPC7

ip 192.168.10.1/24

設定 Gateway

ip 192.168.10.1 255.255.255.0 192.168.10.254

ping 192.168.10.254

ping 192.168.20.254

ping 192.168.20.1

VPC8

ip 192.168.20.1/24

設定 Gateway

ip 192.168.20.1 255.255.255.0 192.168.20.254

ping 192.168.10.254

ping 192.168.20.254

ping 192.168.10.1

SW L3

int vlan 10

ip add 192.168.10.254 255.255.255.0

no shut

int vlan 20

ip add 192.168.20.254 255.255.255.0

no shut

do sh ip int brief

int e0/0

設定 trunk 的 encapsulation

switchport trunk encapsulation dot1q

switchport mode trunk

exit

vtp mode server

vtp domain ccna

vlan 10

vlan 20

do sh vlan brief

do sh run

SW

int e0/1

switchport mode access

switchport access vlan 10

int e0/2

switchport mode access

switchport access vlan 20

do sh vlan brief

實戰練習：VRF

R1

int e0/0

ip addr 192.168.1.1 255.255.255.0

no shut

router ospf 1

net 192.168.1.0 0.0.0.255 area 0

ping 192.168.2.1

R2

int e0/0

ip addr 192.168.2.1 255.255.255.0

no shut

router ospf 1

net 192.168.2.0 0.0.0.255 area 0

R3

int e0/0

ip addr 192.168.3.1 255.255.255.0

no shut

router ospf 1

net 192.168.3.0 0.0.0.255 area 0

R4

int e0/0

ip addr 192.168.4.1 255.255.255.0

no shut

router ospf 1

net 192.168.4.0 0.0.0.255 area 0

R5

ip vrf Upper

ip vrf Lower

int e0/0

ip vrf forwarding Upper

ip addr 192.168.1.2 255.255.255.0

no shut

int e0/1

ip vrf forwarding Lower

ip addr 192.168.3.2 255.255.255.0

no shut

int e0/2

no shut

int e0/2.10

ip vrf for Upper

encapsulation dot1Q 10

ip addr 56.1.1.1 255.255.255.0

int e0/2.20

ip vrf for Lower

encapsulation dot1Q 20

ip addr 56.3.3.3 255.255.255.0

do sh ip vrf

do sh ip route vrf Upper 

do sh ip route vrf Lower

router ospf 1 vrf Upper

net 192.168.1.0 0.0.0.255 area 0

net 56.1.1.0 0.0.0.255 area 0

router ospf 2 vrf Lower

net 192.168.3.0 0.0.0.255 area 0

net 56.3.3.0 0.0.0.255 area 0

R6

ip vrf Upper

ip vrf Lower

int e0/0

ip vrf forwarding Upper

ip addr 192.168.2.2 255.255.255.0

no shut

int e0/1

ip vrf forwarding Lower

ip addr 192.168.4.2 255.255.255.0

no shut

int e0/2

no shut

int e0/2.10

ip vrf for Upper

encapsulation dot1Q 10

ip addr 56.1.1.2 255.255.255.0

int e0/2.20

ip vrf for Lower

encapsulation dot1Q 20

ip addr 56.3.3.4 255.255.255.0

do sh ip vrf

do sh ip route vrf Upper 

do sh ip route vrf Lower

router ospf 1 vrf Upper

net 192.168.2.0 0.0.0.255 area 0

net 56.1.1.0 0.0.0.255 area 0

router ospf 2 vrf Lower

net 192.168.4.0 0.0.0.255 area 0

net 56.3.3.0 0.0.0.255 area 0