View source for RUTX DMVPN

==Introduction==

<b>Dynamic Multipoint VPN</b> (<b>DMVPN</b>) is a dynamic tunneling form of a virtual private network (VPN) supported on Cisco routers. This article contains step-by-step instructions on how to configure DMVPN between a "HUB" and two "Spokes" using RUTXxx routers.

==Prerequisites==

You will need:

<ul>
    <li>At least two RUTXxx routers</li>
    <li>A PC to configure the routers</li>
    <li>HUB has to be reachable from spokes (HUB must have Public IP address, or has to be in the same WAN network as Spokes)</li>
</ul>

==Configuration scheme==

[[File:rutx_dmvpn_topology_v1.png|border|class=tlt-border|1053x1053px]]

==Spoke configuration==

This section contains information on how to configure DMVPN <b>Spokes</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>Note</b>: at the moment, BGP is the only stable dynamic routing solution that can work with DMVPNs.

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'''STEP 1:''' Connect to router's '''WebUI''', go to '''Services > VPN > DMVPN'''. Enter a name for your DMVPN instance, click '''ADD''' and when instance appears in '''DMVPN CONFIGURATION''' field, click '''Edit'''.

[[File:Rutx dmvpn spoke 1 v1.png|border|class=tlt-border|1095x1095px]]
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'''STEP 2:''' Configure DMVPN settings.

[[File:Rutx dmvpn spoke 2 v1.png|border|class=tlt-border|1094x1094px]]

#'''Enable''' instance.
#Select '''Working mode''' (Spoke).
#Enter '''HUB Address''' (HUB WAN IP).
#Select '''Tunnel source''' (select your WAN interface).
#Write '''Local GRE interface IP address''' (create GRE tunnel IP address or just use the same as in the example).
#Write Remote '''GRE interface IP address''' (create GRE tunnel IP address or just use the same as in the example).
#Add '''GRE MTU''' (largest PDU size of any single transaction).
#Write '''GRE keys''' (it must match with HUB and other Spokes).
#Add '''Pre-shared key''' (it must match HUB and other Spokes).
#Write '''IKE lifetime''' (how long the keying channel of a connection should last before being renegotiated). '''P.S.''' do that in '''PHASE 1''' and '''PHASE 2'''.
#Leave everything else as default and click '''Save & Apply'''.

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'''STEP 3:''' Go to '''Network > Routing > Dynamic Routes > BGP''' and make the necessary configuration.

[[File:Rutx dmvpn spoke 3 v1.png|border|class=tlt-border|1085x1085px]]

#'''Enable''' instance.
#'''Enable vty''' instance.
#Enable '''BGP Instance'''.
#Add '''AS''' (Autonomous system name, it must match with other Spokes).
#Write '''BGP router ID''' (HUB GRE Tunnel IP).
#Add '''Network''' (HUB LAN network IP with subnet mask).
#Select '''Redistribution options'''.
#Write a '''Name''' of the new instance (anything you want).
#Press '''Add''' button and then new BGP peer will appear.
#Add '''REMOTE AS''' (it must match AS in BGP instance).
#Write '''REMOTE ADDRESS''' (HUB GRE IP).
#'''Enable''' peer.
#Leave everything else as default and click '''Save & Apply'''.

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Repeat this on different routers as many times as the number of Spokes that you need. Remember that other Spokes will have different LAN, WAN and GRE IP addresses.

==HUB configuration==

This section contains information on how to configure DMVPN HUB.

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'''STEP 1:''' Connect to router's '''WebUI''', go to '''Services > VPN > DMVPN'''. Enter a name for your DMVPN instance, click '''ADD''' and when instance appears in '''DMVPN CONFIGURATION''' field, click '''Edit'''.

[[File:Rutx dmvpn spoke 1 v1.png|border|class=tlt-border|1073x1073px]]

----

'''STEP 2:''' Configure DMVPN settings.

[[File:Rutx dmvpn spoke 4 v1.png|border|class=tlt-border|1094x1094px]]

#'''Enable''' instance.
#Select '''Working mode'''.
#Select '''Tunnel source''' (select your WAN interface).
#Write '''Local GRE interface IP address''' (create GRE tunnel IP address or just use the same as in the example).
#Write '''Local GRE interface netmask'''.
#Add '''GRE MTU''' (largest PDU size of any single transaction).
#Write '''GRE keys''' (it must match with HUB and other Spokes).
#Add '''Pre-shared key''' (it must match HUB and other Spokes).
#Write '''IKE lifetime''' (how long the keying channel of a connection should last before being renegotiated). '''P.S.''' do that in '''PHASE 1''' and '''PHASE 2'''.
#Leave everything else as default and click '''Save & Apply'''.

----

'''STEP 3:''' Go to '''Network > Routing > Dynamic Routes > BGP''' and make the necessary configuration.

[[File:Rutx dmvpn spoke 5 v1.png|border|class=tlt-border|1085x1085px]]

#'''Enable''' instance.
#'''Enable vty''' instance.
#Enable '''BGP Instance'''.
#Add '''AS''' (Autonomous system name, it must match with other Spokes).
#Write '''BGP router ID''' (HUB GRE Tunnel IP).
#Add '''Network''' (HUB LAN network IP with subnet mask).
#Select '''Redistribution options'''.
#Write '''BGP PEER GROUP NAME''' (anything you want).
#Press '''ADD''' button and then new BGP PEER GROUP will appear.
#Add '''REMOTE AS''' (it must match AS in BGP instance).
#Leave everything else as default and click '''Save & Apply'''.

==Testing configuration==

Access '''HUB''' and '''Spoke WebUI''', check whether new routes appeared (it should look similar to the examples).

'''SPOKE:'''

[[File:Rutx dmvpn spoke 6 v1.png|border|class=tlt-border|1079x1079px]]

'''HUB:'''

[[File:Rutx dmvpn spoke 7 v1.png|border|class=tlt-border|1082x1082px]]