DMVPN can't be done for ssecond spoke in GNS3

[Mary]

I got three router R1, R3,and R2, R2 is hub, R1 can ping R2 through f0/0, now R3 can't ping R2. but in R3 it can show nhs and nhrp.

since f0/0 in R2 is used for R1 connection, how should I do? I can't draw a line between R3 (spoke)and R2(hub)pls see attached GNS3 screen

if I don't draw a line between R2 and R3, in R3 I can't ping R2 10.1.0.2

R3:

interface Loopback0
ip address 150.1.0.3 255.255.255.0
!
interface Tunnel0
ip address 10.1.0.3 255.255.255.0
ip nhrp authentication cisco123
ip nhrp map multicast 169.254.100.2
ip nhrp map 10.1.0.2 169.254.100.2
ip nhrp network-id 99
ip nhrp nhs 10.1.0.2
tunnel source FastEthernet0/0
tunnel destination 169.254.100.2
!
interface FastEthernet0/0
ip address 169.254.100.3 255.255.255.0
duplex auto
speed auto

++++++++++++++

R2:

interface Loopback0
ip address 150.1.0.2 255.255.255.0
!
interface Tunnel0
ip address 10.1.0.2 255.255.255.0
no ip redirects
ip nhrp authentication cisco123
ip nhrp map multicast dynamic
ip nhrp network-id 99
tunnel source FastEthernet0/0
tunnel mode gre multipoint
!
interface FastEthernet0/0
ip address 169.254.100.2 255.255.255.0
duplex auto
speed auto

[Tim Y]

Hi,

You can't jam two cables into one interface in real life, and you won't be able to do that in GNS3 either.

You need to emulate a WAN network with full connectivity between all nodes, because that's the kind of WAN connectivity (like the Internet) you would use for a DMVPN.

Instead of the routers connecting to each other directly, they should all connect to either a:

L3 switch

• Each router on a different VLAN/subnet
• Inter-VLAN routing set up between these three VLANs

L2 switch

• Each router on a different VLAN/subnet
• A fourth router connected to the switch via a trunk with router-on-a-stick configured

Regards,

Tim

[Mary]

No, we use cloud instead, but my machine is forbidden to run VMWare, I create three null port R1. R2 and R3 in the cloud to connect to R1, R2, R3 's f0/0 interface, but not working, is any expert in GNS3 can give some advice how to configure cloud for DMVPN, now in R3, I can't ping to R(hub)