DMVPN多层级分支一跳互通实验

R1为HUB

R3 R4为R1的一级子分支

R7 R8是R3的子分支

R9 R10是R4的子分支

R2 R5 R6是ISP

目标为R7-R9 R10一跳互通 R8-R9 R10一跳互通

首先保证R2 R5 R6到全网任何位置的连通性

再做R1 R3 R4的HUB-SPOKE结构

再进行R3 R7 R8和R4 R9 R10的HUB-SPOKE结构的配置

interface Tunnel0
ip address 172.16.34.1 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp redirect
ip ospf network broadcast
tunnel source Ethernet0/0
tunnel mode gre multipoint
tunnel key 100
!
interface Ethernet0/0
ip address 10.0.12.1 255.255.255.0
no ip split-horizon eigrp 90
ip ospf network non-broadcast
!
interface Ethernet0/1
no ip address
shutdown
!
interface Ethernet0/2
no ip address
shutdown
!
interface Ethernet0/3
no ip address
shutdown
!
router ospf 1
router-id 1.1.1.1
network 172.16.0.0 0.0.255.255 area 0

interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Loopback1
ip address 33.33.33.33 255.255.255.255
!
interface Tunnel0
ip address 172.16.34.3 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.34.1 nbma 10.0.12.1 multicast

ip nhrp shortcut
ip ospf network broadcast
ip ospf priority 0
tunnel source Loopback0
tunnel mode gre multipoint
tunnel key 100
!
interface Tunnel1
ip address 172.16.78.3 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp redirect
ip ospf network broadcast
tunnel source Loopback1
tunnel mode gre multipoint
tunnel key 100
!

router ospf 1
router-id 3.3.3.3
network 172.16.0.0 0.0.255.255 area 0

ip route 0.0.0.0 0.0.0.0 10.0.23.2

interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface Loopback1
ip address 44.44.44.44 255.255.255.255
!
interface Tunnel0
ip address 172.16.34.4 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.34.1 nbma 10.0.12.1 multicast

ip nhrp shortcut
ip ospf network broadcast
ip ospf priority 0
tunnel source Loopback0
tunnel mode gre multipoint
tunnel key 100
!
interface Tunnel1
ip address 172.16.109.4 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp redirect
ip ospf network broadcast
tunnel source Loopback1
tunnel mode gre multipoint
tunnel key 100
!

router ospf 1
router-id 4.4.4.4
network 172.16.0.0 0.0.255.255 area 0
!

ip route 0.0.0.0 0.0.0.0 10.0.24.2

!
interface Tunnel0
ip address 172.16.78.7 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.78.3 nbma 33.33.33.33 multicast
ip nhrp redirect
ip ospf network broadcast
ip ospf priority 0
tunnel source Ethernet0/0
tunnel mode gre multipoint
tunnel key 100

router ospf 1
router-id 7.7.7.7
network 172.16.0.0 0.0.255.255 area 0
!

ip route 0.0.0.0 0.0.0.0 Ethernet0/0

!
interface Tunnel0
ip address 172.16.78.8 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.78.3 nbma 33.33.33.33 multicast
ip nhrp redirect
ip ospf network broadcast
ip ospf priority 0
tunnel source Ethernet0/0
tunnel mode gre multipoint
tunnel key 100
!

!
router ospf 1
router-id 8.8.8.8
network 172.16.0.0 0.0.255.255 area 0
!

ip route 0.0.0.0 0.0.0.0 10.0.58.5

!
interface Tunnel0
ip address 172.16.109.9 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.109.4 nbma 44.44.44.44 multicast
ip nhrp redirect
ip ospf network broadcast
ip ospf priority 0
tunnel source Ethernet0/0
tunnel mode gre multipoint
tunnel key 100
!

!
router ospf 1
router-id 9.9.9.9
network 172.16.0.0 0.0.255.255 area 0
!

ip route 0.0.0.0 0.0.0.0 10.0.69.6

!
interface Tunnel0
ip address 172.16.109.10 255.255.255.0
no ip redirects
ip nhrp network-id 100
ip nhrp nhs 172.16.109.4 nbma 44.44.44.44 multicast
ip nhrp redirect
ip ospf network broadcast
ip ospf priority 0
tunnel source Ethernet0/0
tunnel mode gre multipoint
tunnel key 100
!

!
router ospf 1
router-id 10.10.10.10
network 172.16.0.0 0.0.255.255 area 0
!

ip route 0.0.0.0 0.0.0.0 10.0.106.6

该实验中需要注意

1、全网tunnel key值需要相同，否则无法做成动态隧道

2、在R3和R4上需要做2个tunnel并且2个tunnel的源都不同否则在数据传输的过程中从下层传输的数据无法分辨应该进入到那条通路

ip nhrp shortcut 发起对对应地址的公网映射请求

ip nhrp redirect 本地无请求的映射关系进行转发

故转发到最后一节拿到映射关系后就打成了一跳互通

需要注意的是当第一次测试时不会一跳互通因为一跳互通的请求需要被发起

所以在发起了一跳互通之后的测试都是一跳互通

DMVPN多层级分支一跳互通实验

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