Difference between revisions of "DMVPN with IPsec Phase 3"

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<p style="color:red">The information in this page is updated in accordance with [https://wiki.teltonika-networks.com/view/FW_%26_SDK_Downloads'''00.07.03.2'''] firmware version. .</p>
 
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==Introduction==
 
==Introduction==
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−
 
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'''DMVPN''' (Dynamic Multipoint Virtual Private Network) is a dynamic tunneling form of a virtual private network capable of creating a VPN network without having pre-configure all possible tunnel end-point peers. DMVPN is initially configured to build out a HUB and SPOKE network, where each new SPOKE can join the network with minimal effort. The main benefits of DMVPN would be that it simplifies router configuration, has high scalability, good performance with better bandwidth, and secure routing when used in combination with IPsec.
 
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'''DMVPN''' has three phases that route data differently:
 
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Phase 1: All traffic goes from the spoke to and through the hub.
 
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Phase 2: Starts with Phase 1 and after it allows spoke-to-spoke tunnels. Phase 2 has different routing, where packet forwarding is being done using the IP routing table. Spokes reach other spokes networks based on the next-hop tunnel IP address of the other spoke for a particular network.
 
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Phase 3: Improves the scalability and has fewer restrictions than Phase 2. Phase 3 allows the summarization of routes from hub to spokes. Spokes don’t even need routes, they can use the default gateway toward the hub router.
 
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This article contains instructions on how to configure DMVPN Phase 3 between a "Hub" and two "Spokes" using Teltonika devices.
 
This article contains instructions on how to configure DMVPN Phase 3 between a "Hub" and two "Spokes" using Teltonika devices.
Line 23: Line 8:
  
 
<ul>
 
<ul>
−
     <li>2 Teltonika Routers for '''SPOKES'''</li>
+
     <li>2 Teltonika Routers for "Spokes" and one for "Hub"</li>
−
    <li>1 Teltonika Router for '''HUB''' with a public IP address</li>
 
 
     <li>A PC to configure the routers</li>
 
     <li>A PC to configure the routers</li>
 +
    <li>HUB must have a Public IP address</li>
 
</ul>
 
</ul>
  
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==Configuration scheme==
+
==HUB configuration==
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[[File:DMVPN phase3 topology.png|border|class=tlt-border|1053x1053px]]
 
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−
 
 
−
==The SETUP==
 
  
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The following section contains information on how to configure DMVPN <b>HUB</b>. Firstly, we'll configure the DMVPN instance to make the connection possible. Then we'll set the <b>Border Gateway Protocol</b> (<b>BGP</b>) parameters as our dynamic routing solution.
+
This section contains information on how to configure DMVPN <b>HUB</b>. Firstly, we'll configure the DMVPN instance to make the connection possible. Then we'll set the <b>Border Gateway Protocol</b> (<b>BGP</b>) parameters as our dynamic routing solution.
  
−
<b>Notes</b>:
+
<b>Note</b>: at the moment, BGP is the only stable dynamic routing solution that can work with DMVPNs.
−
 
 
−
- At the moment, BGP is the only stable dynamic routing solution that can work with DMVPN.
 
−
 
 
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- If you are using non RUTX device, BGP and DMVPN have to be installed manually from the '''Services → Package Manager''' tab before continuing.
 
−
 
 
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- If you're having trouble finding any page or some of the parameters described here on your device's WebUI, you should turn on "Advanced WebUI" mode. You can do that by clicking the "Basic" button under "Mode," which is located at the top-right corner of the WebUI.
 
−
[[File:1004px-Basic WebUI Advanced.gif|alt=|border]]
 
  
 
===HUB configuration: DMVPN===
 
===HUB configuration: DMVPN===
Line 51: Line 25:
 
<b>Step 1</b>: create a new DMVPN instance:
 
<b>Step 1</b>: create a new DMVPN instance:
  
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1. Select your HUB interface in the Tunnel source field
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- Select your HUB interface in the Tunnel source field
−
 
 
−
2. Set Local GRE interface IP address (for example, 10.0.0.254)
 
−
 
 
−
3. Set GRE interface netmask to 255.255.255.255
 
  
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4. Set GRE MTU value to 1420 (or even slightly lower - 1400 if a mobile interface is used)
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- Set Local GRE interface IP address (for example, 10.0.0.254)
  
−
- Outbound/inbound keys are optional, for this example we will leave it at default
+
- Set GRE MTU value to 1476
  
−
5. Set IPsec Pre-shared key (we used simple 123456 for this example)
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- Set Pre-shared key (we used simple 123456 for this example)
  
−
<br>[[File:HUB main.png|border|class=tlt-border]]
+
<br>[[File:DMVP_HUB_phase3_example1.png]]
 
----
 
----
−
<b>Step 2</b>: configure '''DMVPN Phase 1''' parameters:
+
<b>Step 2</b>: configure DMVPN Phase 1 parameters:
  
−
1. Encryption algorithm - AES 128
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- Encryption algorithm - AES 128
  
−
2. Authentication SHA256
+
- Authentication SHA1
  
−
3. DH group - MODP3072
+
- DH group - MODP1024
  
−
<br>[[File:Hub phase1.png|border|class=tlt-border]]
+
<br>[[File:DMVP HUB phase3 example2.png]]
 
----
 
----
−
<b>Step 3</b>: configure '''DMVPN Phase 2''' parameters:
+
<b>Step 3</b>: configure DMVPN Phase 2 parameters:
  
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1. Encryption algorithm - AES 128
+
- Encryption algorithm - 3DES
  
−
2. Hash algorithm - SHA256
+
- Hash algorithm - MD5
  
−
3. PFS group -MODP3072
+
- PFS group -MODP768
  
−
<br>[[File:Hub phase2 fix.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 example3.png]]
 
----
 
----
−
<b>Step 4</b>: configure '''DMVPN NHRP''' parameters:
+
<b>Step 4</b>: configure DMVPN NHRP parameters:
−
 
 
−
In the NHRP parameters section, it is important to enable '''REDIRECT''' option, which is essential to our Phase 3 configuration.
 
  
−
<br>[[File:Redirect.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 example4.png]]
 
----
 
----
 
<b>Step 5</b>: save changes
 
<b>Step 5</b>: save changes
  
−
===Hub configuration: BGP ===
+
===Hub configuration: BGP===
  
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
  
−
<b>Step 1</b>: enable '''BGP''' and configure General section:
+
<b>Step 1</b>: enable BGP and configure General section:
−
 
 
−
1. Enable vty
 
−
 
 
−
2. Set AS to 65000
 
  
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3. Set BGP router ID for easier management.
+
- Enable vty
  
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4. Set announcement network(s). Routes to these networks will be shared over BGP. We used 192.168.1.0/24
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- Set AS to 65000
  
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5. "NHRP routes" selection should be applied under the "Redistribution options" section
+
- Set announcement network(s). Routes to these networks will be shared over BGP. We used 192.168.1.0/24
  
−
<br>[[File:Hub bgp.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 example5.png]]
 
----
 
----
  
  
−
<b>Step 2</b>: Create '''BGP''' Peer Group:
+
<b>Step 2</b>: Create BGP Peer Group:
−
 
 
−
- Add a Neighbor address for SPOKE 1 and SPOKE 2 (We used 10.0.0.1 and 10.0.0.2 which will be in the same subnet as our hub 10.0.0.254)
 
  
−
- Leave other settings as default.
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- Add Neighbor address (We used 10.0.0.1 and 10.0.0.2)
  
−
<br>[[File:Bgp peer grp.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 example6.png]]
 
----
 
----
  
  
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<b>Step 3</b>: Add two '''BGP''' peers for each spoke:
+
<b>Step 3</b>: Add two BGP peers for each spoke:
−
 
 
−
Now let's create BGP peers for Spokes on the same page. Add two new BGP peers with the following parameters:
 
  
 
Peer 1.
 
Peer 1.
Line 139: Line 99:
 
- Set Remote address as 10.0.0.2
 
- Set Remote address as 10.0.0.2
  
−
We will keep other settings as their default values for this configuration example.
+
<br>[[File:DMVPN HUB Phase3 example7.png]]
−
 
 
−
<br>[[File:Bgp peer1.png|border|class=tlt-border]]
 
 
----
 
----
−
[[File:Bgp peer2.png|border|class=tlt-border]]
+
[[File:DMVPN HUB Phase3 example8.png]]
 
----
 
----
  
  
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=== Spoke 1 configuration: DMVPN===
+
===Spoke 1 configuration: DMVPN===
 
----
 
----
−
 
−
 
 
Navigate to the <b>Services → VPN → DMVPN</b> page and follow the instructions provided below.
 
Navigate to the <b>Services → VPN → DMVPN</b> page and follow the instructions provided below.
  
 
<b>Step 1</b>: create a new DMVPN instance:
 
<b>Step 1</b>: create a new DMVPN instance:
  
−
1. Add HUB address (this is the public IP address of the previously configured hub device)
+
- Add HUB address
  
−
2. Select Tunnel source (this is the egress interface, which will be able to reach the hub device's public IP address over the internet)
+
- Select Tunnel source
  
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3.  Add Local GRE interface IP address (this is the GRE IP address of "Spoke 1". It should be unique in the entire VPN network)
+
- Add Local GRE interface IP address
  
−
4.  Add Remote GRE interface IP address (this is the GRE IP address of the previously configured hub device)
+
- Add Remote GRE interface IP address
  
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5.  Set GRE MTU to 1420  (this value should be set to the same value that was configured on the hub device. In our case, it is "1420")
+
- Set GRE MTU
  
−
6.  Set Local identifier (For setups behind NAT), Remote identifier as %any and input the same Pre-shared key (This will determine how other devices will be identified for authentication)
+
- Set Local identifier, Remote identifier as %any and input same Pre-shared key
  
−
<br>[[File:Spoke dmvpn.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke1 example1.png]]
 
----
 
----
  
  
−
<b>Step 2</b>: configure '''DMVPN''' '''Phase 1''' parameters:
+
<b>Step 2</b>: configure DMVPN Phase 1 parameters:
  
−
1.  Select the Encryption algorithm - AES 128
+
- Select Encryption algorithm - AES 128
  
−
2.  Select Authentication SHA256
+
- Select Authentication SHA1
  
−
3.  Select DH group MODP3072
+
- Select DH group MODP1024
  
−
<br>[[File:Hub phase1.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke example2.png]]
 
----
 
----
  
  
−
<b>Step 3</b>: configure '''DMVPN Phase 2''' parameters:
+
<b>Step 3</b>: configure DMVPN Phase 2 parameters:
  
−
1. Select the Encryption algorithm AES 128
+
- Select Encryption algorithm 3DES
  
−
2.  Select Hash algorithm SHA256
+
- Select Hash algorithm MD5
  
−
3.  Select PFS group MODP3072
+
- Select PFS group MODP768
  
−
<br>[[File:Hub phase2 fix.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke example3.png]]
 
----
 
----
  
  
−
<b>Step 4</b>: configure '''DMVPN NHRP''' parameters:
+
<b>Step 4</b>: configure DMVPN NHRP parameters:
−
 
 
−
- In the NHRP parameters section, it is important to enable REDIRECT option, which is essential to our Phase 3 configuration.
 
  
 
- Leave everything by default
 
- Leave everything by default
  
−
<br>[[File:Redirect.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke example4.png]]
 
----
 
----
 
<b>Step 5</b>: save changes
 
<b>Step 5</b>: save changes
  
−
===Spoke 1 configuration: BGP ===
+
===Spoke 1 configuration: BGP===
  
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
  
−
<b>Step 1</b>: enable '''BGP''' and configure General section:
+
<b>Step 1</b>: enable BGP and configure General section:
  
−
1. Enable vty
+
- Enable vty
  
−
2. Set AS to 65001
+
- Set AS to 65001
  
−
3. Set Network to 192.168.10.0/24
+
- Set Network to 192.168.10.0/24
  
−
<br>[[File:Spoke bgp.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke example5.png]]
 
----
 
----
  
  
−
<b>Step 2</b>: Create '''BGP''' Peer:
+
<b>Step 2</b>: Create BGP Peer:
  
 
- Set Remote AS to 65000
 
- Set Remote AS to 65000
  
−
- Set the Remote address to 10.0.0.254
+
- Set Remote address to 10.0.0.254
  
−
- Leave everything else as default value
+
<br>[[File:DMVPN HUB Phase3 spoke example6.png]]
−
 
 
−
<br>[[File:Spoke bgp peer.png|border|class=tlt-border]]
 
  
 
===Spoke 2 configuration: DMVPN===
 
===Spoke 2 configuration: DMVPN===
Line 235: Line 187:
 
Navigate to the <b>Services → VPN → DMVPN</b> page and follow the instructions provided below.
 
Navigate to the <b>Services → VPN → DMVPN</b> page and follow the instructions provided below.
  
−
<b>Step 1</b>: create a new DMVPN instance:  
+
<b>Step 1</b>: create a new DMVPN instance:
−
 
 
−
1. Add HUB address  (this is the public IP address of the previously configured hub device)
 
  
−
2. Select Tunnel source (this is the egress interface, which will be able to reach the hub device's public IP address over the internet)
+
- Input your HUB address
  
−
3. Add Local GRE interface IP address  (this is the GRE IP address of "Spoke 2". It should be unique in the entire VPN network)
+
- Select Tunnel source interface
  
−
4. Add Remote GRE interface IP address (this is the GRE IP address of the previously configured hub device)
+
- Set Local GRE interface address to 10.0.0.2
  
−
5. Set GRE MTU to 1420  (this value should be set to the same value that was configured on the hub device. In our case, it is "1420")
+
- Set Remote GRE interface IP address to 10.0.0.254
  
−
6. Set Local identifier (For setups behind NAT), Remote identifier as %any and input the same Pre-shared key (This will determine how other devices will be identified for authentication)
+
- Set GRE MTU to 1476
  
−
<br>[[File:Spoke2 dmvpn.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke2 example1.png]]
 
----
 
----
  
  
−
<b>Step 2</b>: configure '''DMVPN Phase 1''' parameters:
+
<b>Step 2</b>: configure DMVPN Phase 1 parameters:
  
−
1. Select Encryption algorithm - AES 128
+
- Select Encryption algorithm - AES 128
  
−
2. Select Authentication SHA256
+
- Select Authentication SHA1
  
−
3. Select DH group MODP3072
+
- Select DH group MODP1024
  
−
<br>[[File:Hub phase1.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke2 example2.png]]
 
----
 
----
−
<b>Step 3</b>: configure '''DMVPN Phase 2''' parameters:
+
<b>Step 3</b>: configure DMVPN Phase 2 parameters:
  
−
1. Select Encryption algorithm AES 128
+
- Select Encryption algorithm 3DES
  
−
2. Select Hash algorithm SHA256
+
- Select Hash algorithm MD5
  
−
3. Select PFS group MODP3072
+
- Select PFS group MODP768
  
−
<br>[[File:Hub phase2 fix.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke2 example3.png]]
 
----
 
----
  
  
−
<b>Step 4</b>: configure '''DMVPN NHRP''' parameters:
+
<b>Step 4</b>: configure DMVPN NHRP parameters:
−
 
 
−
- In the NHRP parameters section, it is important to enable REDIRECT option, which is essential to our Phase 3 configuration.
 
−
 
 
−
- Leave everything by default
 
  
−
<br>[[File:Redirect.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke2 example4.png]]
 
----
 
----
 
<b>Step 5</b>: save changes
 
<b>Step 5</b>: save changes
  
−
===Spoke 2 configuration: BGP ===
+
===Spoke 2 configuration: BGP===
  
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
 
Navigate to the <b>Network → Routing → Dynamic Routes → BGP Protocol</b> page and follow the instructions provided below.
  
−
<b>Step 1</b>: enable '''BGP''' and configure General section:
+
<b>Step 1</b>: enable BGP and configure General section:
  
−
1.  Enable vty
+
- Enable vty
  
−
2.  Set AS to 65002
+
- Set AS to 65002
  
−
3.  Set Network to 192.168.20.0/24
+
- Set Network to 192.168.20.0/24
  
−
<br>[[File:Spoke2 bgp peer.png|border|class=tlt-border]]
+
<br>[[File:DMVPN HUB Phase3 spoke2 example5.png]]
 
----
 
----
  
  
−
<b>Step 2</b>: Create '''BGP''' Peer:
+
<b>Step 2</b>: Create BGP Peer:
  
 
- Set Remote AS to 65000
 
- Set Remote AS to 65000
Line 307: Line 253:
 
- Set Remote address to 10.0.0.254
 
- Set Remote address to 10.0.0.254
  
−
- Leave everything else as default value
+
<br>[[File:DMVPN HUB Phase3 spoke2 example6.png]]
  
−
<br>[[File:Spoke bgp peer.png|border|class=tlt-border]]
 
−
 
−
----
 
 
===Important Note===
 
===Important Note===
−
For '''HUB''' in Network <b>→</b> Firewall GRE zone change from '''REJECT''' to '''ACCEPT''' on '''FORWARD.'''
 
  
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Also, disable '''Masquerading''' on '''HUB''' and '''ALL spokes''' for GRE <b>→</b> LAN zone forwardings
+
For HUB in Network > Firewall GRE zone change from REJECT to ACCEPT on FORWARD.
  
−
[[File:Firewall new.png|alt=|border]]
+
----
 +
[[File:DMVPN HUB Phase3 example Firewall.png]]
 +
----
  
−
===Testing configuration===
 
  
−
'''- ipsec statusall''' command can be used in the CLI/SSH for testing the tunnel. It will return detailed status information either on connection or if the argument is lacking, on all connections. If everything was done correctly, it should display that tunnel has been established.
+
For setups behind NAT specify Local identifier in the <b>Services → VPN → DMVPN → IPsec section </b>
  
−
'''- ping''' command can be used to check if the HUB and SPOKES can reach each other.
+
----
−
 
+
[[File:DMVPN HUB Phase3 example Behind NAT.png]]
−
[[File:Ping.png|alt=|border]]
 
−
 
 
−
[[File:Ping2.png|alt=|border]]
 
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- Check routes in the HUB by executing command '''vtysh -c "show ip nhrp"'''
 
−
 
 
−
[[File:Vtysh nhrp2.jpg|alt=|border]]
 
−
 
 
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- If you need to reboot tunnel, execute '''/etc/init.d/ipsec retart'''
 
−
 
 
−
== Summary ==
 
−
 
 
−
At this point, the basic DMVPN configuration is complete and phase 3 will now take effect in order to dynamically establish connectivity between spokes. Using this method, additional spokes may be configured and added to the current topology. DMVPN Phase 3 technology will ensure that any newly introduced devices will be included in the final topology.
 
−
== References ==
 
−
[https://wiki.teltonika-networks.com/view/VPN_Configuration_Examples VPN configuration Examples]
 
−
 
 
−
[https://wiki.teltonika-networks.com/view/DMVPN_configuration DMVPN configuration example]
 
−
 
 
−
[https://wiki.teltonika-networks.com/view/IPsec_configuration_examples IPsec configuration example]
 
−
 
 
−
[https://wiki.teltonika-networks.com/view/Routing#BGP_Protocol BGP routing]
 
−
 
 
−
[https://docs.strongswan.org/docs/5.9/index.html strongSwan Documentation]
 
−
 
 
−
[[Category:VPN]]
 

Revision as of 09:02, 16 December 2022

Main Page > General Information > Configuration Examples > VPN > DMVPN with IPsec Phase 3

Introduction

This article contains instructions on how to configure DMVPN Phase 3 between a "Hub" and two "Spokes" using Teltonika devices.

Prerequisites and overview

You will need:

  • 2 Teltonika Routers for "Spokes" and one for "Hub"
  • A PC to configure the routers
  • HUB must have a Public IP address

HUB configuration

This section contains information on how to configure DMVPN HUB. Firstly, we'll configure the DMVPN instance to make the connection possible. Then we'll set the Border Gateway Protocol (BGP) parameters as our dynamic routing solution.

Note: at the moment, BGP is the only stable dynamic routing solution that can work with DMVPNs.

HUB configuration: DMVPN

Navigate to the Services → VPN → DMVPN page and follow the instructions provided below.

Step 1: create a new DMVPN instance:

- Select your HUB interface in the Tunnel source field

- Set Local GRE interface IP address (for example, 10.0.0.254)

- Set GRE MTU value to 1476

- Set Pre-shared key (we used simple 123456 for this example)


DMVP HUB phase3 example1.png

Step 2: configure DMVPN Phase 1 parameters:

- Encryption algorithm - AES 128

- Authentication SHA1

- DH group - MODP1024


DMVP HUB phase3 example2.png

Step 3: configure DMVPN Phase 2 parameters:

- Encryption algorithm - 3DES

- Hash algorithm - MD5

- PFS group -MODP768


DMVPN HUB Phase3 example3.png

Step 4: configure DMVPN NHRP parameters:


DMVPN HUB Phase3 example4.png

Step 5: save changes

Hub configuration: BGP

Navigate to the Network → Routing → Dynamic Routes → BGP Protocol page and follow the instructions provided below.

Step 1: enable BGP and configure General section:

- Enable vty

- Set AS to 65000

- Set announcement network(s). Routes to these networks will be shared over BGP. We used 192.168.1.0/24


DMVPN HUB Phase3 example5.png


Step 2: Create BGP Peer Group:

- Add Neighbor address (We used 10.0.0.1 and 10.0.0.2)


DMVPN HUB Phase3 example6.png


Step 3: Add two BGP peers for each spoke:

Peer 1.

- Set Remote AS to 65001

- Set Remote address as 10.0.0.1

Peer 2.

- Set Remote AS to 65002

- Set Remote address as 10.0.0.2


DMVPN HUB Phase3 example7.png

DMVPN HUB Phase3 example8.png


Spoke 1 configuration: DMVPN

Navigate to the Services → VPN → DMVPN page and follow the instructions provided below.

Step 1: create a new DMVPN instance:

- Add HUB address

- Select Tunnel source

- Add Local GRE interface IP address

- Add Remote GRE interface IP address

- Set GRE MTU

- Set Local identifier, Remote identifier as %any and input same Pre-shared key


DMVPN HUB Phase3 spoke1 example1.png


Step 2: configure DMVPN Phase 1 parameters:

- Select Encryption algorithm - AES 128

- Select Authentication SHA1

- Select DH group MODP1024


DMVPN HUB Phase3 spoke example2.png


Step 3: configure DMVPN Phase 2 parameters:

- Select Encryption algorithm 3DES

- Select Hash algorithm MD5

- Select PFS group MODP768


DMVPN HUB Phase3 spoke example3.png


Step 4: configure DMVPN NHRP parameters:

- Leave everything by default


DMVPN HUB Phase3 spoke example4.png

Step 5: save changes

Spoke 1 configuration: BGP

Navigate to the Network → Routing → Dynamic Routes → BGP Protocol page and follow the instructions provided below.

Step 1: enable BGP and configure General section:

- Enable vty

- Set AS to 65001

- Set Network to 192.168.10.0/24


DMVPN HUB Phase3 spoke example5.png


Step 2: Create BGP Peer:

- Set Remote AS to 65000

- Set Remote address to 10.0.0.254


DMVPN HUB Phase3 spoke example6.png

Spoke 2 configuration: DMVPN

Navigate to the Services → VPN → DMVPN page and follow the instructions provided below.

Step 1: create a new DMVPN instance:

- Input your HUB address

- Select Tunnel source interface

- Set Local GRE interface address to 10.0.0.2

- Set Remote GRE interface IP address to 10.0.0.254

- Set GRE MTU to 1476


DMVPN HUB Phase3 spoke2 example1.png


Step 2: configure DMVPN Phase 1 parameters:

- Select Encryption algorithm - AES 128

- Select Authentication SHA1

- Select DH group MODP1024


DMVPN HUB Phase3 spoke2 example2.png

Step 3: configure DMVPN Phase 2 parameters:

- Select Encryption algorithm 3DES

- Select Hash algorithm MD5

- Select PFS group MODP768


DMVPN HUB Phase3 spoke2 example3.png


Step 4: configure DMVPN NHRP parameters:


DMVPN HUB Phase3 spoke2 example4.png

Step 5: save changes

Spoke 2 configuration: BGP

Navigate to the Network → Routing → Dynamic Routes → BGP Protocol page and follow the instructions provided below.

Step 1: enable BGP and configure General section:

- Enable vty

- Set AS to 65002

- Set Network to 192.168.20.0/24


DMVPN HUB Phase3 spoke2 example5.png


Step 2: Create BGP Peer:

- Set Remote AS to 65000

- Set Remote address to 10.0.0.254


DMVPN HUB Phase3 spoke2 example6.png

Important Note

For HUB in Network > Firewall GRE zone change from REJECT to ACCEPT on FORWARD.

DMVPN HUB Phase3 example Firewall.png


For setups behind NAT specify Local identifier in the Services → VPN → DMVPN → IPsec section

DMVPN HUB Phase3 example Behind NAT.png

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