DMVPN – Can DMVPN Be Configured on Cisco Packet Tracer 6.0.1?

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I tried to configure a DMVPN between two routers (hub and spoke) on Cisco Packet Tracer 6.0.1, but it does not accept the commands, i.e., when I type tunnel mode gre multipoint, I get an error on multipoint as it does not exist as an option. Does the program support DMVPNs or should I try GNS3?
Thank you in advance.

Best Answer

Packet Tracer is a tool for basic network simulation (actually specifically designed for CCNA preparation). And simulation is the key word in this sentence: It only simulates an IOS router, and it lacks a fairly broad set of features, including but not limited to:

Limited feature set regarding routing protocols (route summarization in OSPF, tweaking of some EIGRP settings such as hold time, partial support for frame relay...)
No NAT Exception on the simulated ASA
Missing many crypto features
No suppport for multipoint GRE tunnels
No support for DMVPN at all

After all, its for CCNA-level study. So the short answer is: No you cannot. You could use GNS3 or Cisco VIRL to experiment with that topic.

Related Solutions

DMVPN Configuration – How to Pass Traffic from VLANs Through DMVPN [GNS3]

One simple way to do this is to use PBR to change the route traffic.

This should redirect pings from the VLAN interfaces to the interface you want:

ip access-list extended VLAN10_TO_T0
 permit icmp 192.168.10.0 0.0.0.255 host 50.50.50.2 echo
 permit icmp 192.168.10.0 0.0.0.255 host 60.60.60.2 echo
 permit icmp 192.168.10.0 0.0.0.255 host 61.61.61.2 echo

ip access-list extended VLAN20_AND_30_TO_E0
 permit icmp 192.168.20.0 0.0.0.255 host 50.50.50.2 echo
 permit icmp 192.168.20.0 0.0.0.255 host 60.60.60.2 echo
 permit icmp 192.168.20.0 0.0.0.255 host 61.61.61.2 echo
 permit icmp 192.168.30.0 0.0.0.255 host 50.50.50.2 echo
 permit icmp 192.168.30.0 0.0.0.255 host 60.60.60.2 echo
 permit icmp 192.168.30.0 0.0.0.255 host 61.61.61.2 echo

route-map VLAN10_TO_T0 permit 10
 match ip address VLAN10_TO_T0
 set interface Tunnel0

route-map VLAN20_AND_30_TO_E0 permit 10
 match ip address VLAN20_AND_30_TO_E0
 set interface Ethernet0

interface Ethernet0/1.10
 ip policy route-map VLAN10_TO_T0

interface Ethernet0/1.20
 ip policy route-map VLAN20_AND_30_TO_E0

interface Ethernet0/1.30
 ip policy route-map VLAN20_AND_30_TO_E0

Disclaimer: This is not tested; I just created it from memory.

DMVPN Troubleshooting – Spoke Sending Registration Requests But Hub Does Not Receive

You are running DMVPN on a VRF enabled device. Both your public interface (used as tunnel source) and your tunnel endpoint is VRF enabled.

To have the tunnel endpoint in a VRF, you need to enable VRF forwarding on the tunnel interface, which you have done.

To have the tunnel source in a VRF (called frontdoor VRF), you need two things:

The tunnel source interface needs to have VRF forwarding enabled
You need tunnel vrf spoke1 under the tunnel, to instruct the tunnel to use the specified VRF

On R1 and DMVPN, add the following configuration:

int tun 0 tunnel vrf spoke1

You can get additional information on frontdoor VRFs for example on this blog post.

Best Answer

Related Solutions

DMVPN Configuration – How to Pass Traffic from VLANs Through DMVPN [GNS3]

DMVPN Troubleshooting – Spoke Sending Registration Requests But Hub Does Not Receive

Related Topic