ip nhrp map 172.16.1.1 10.149.1.1 I also showed you how to configure DMVPN phase 1, phase 2 and phase 3. N NATed, L Local, X No Socket Email: info@grandmetric.com, Router on a stick approach Cisco configuration, Spanning Tree Protocol (STP) Configuration, Cisco Firewall HA ACTIVE STANDBY Failover, SD-WAN Bidirectional Forwarding Detection (BFD), What is Cisco FirePOWER? keepalive 5 10, crypto isakmp key isakmp1234 address 0.0.0.0 0.0.0.0 < Spoke routers must allow also connections from any IP in order to form IPSECVPN tunnels with other Spokes. - edited crypto ipsec transform-set TS esp-3des esp-md5-hmac ip nhrp map multicast: here we specify which destinations should receive broadcast or multicast traffic through the tunnel interface. Tracing the route to 192.168.161.50 network 172.16.1.0 0.0.0.255. interface Tunnel0 1 172.16.1.3 56 msec 12 msec 24 msec As an Amazon Associate I earn from qualifying purchases. Legend: Attrb > S Static, D Dynamic, I Incomplete This means that Spoke sites can communicate between them directly without having to go through the Hub. 1 172.16.1.2 56 msec 20 msec 28 msec hash md5 DMVPN is not a protocol, it is the combination of the following technologies: + Multipoint GRE (mGRE) + Next-Hop Resolution Protocol (NHRP) + Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP) (optional) + Dynamic IPsec encryption (optional) + Cisco Express Forwarding (CEF) IPsec is optional not required.Reply Hub will receive all multicast traffic (e.g routing protocol updates) and then send out updates to all the Spoke routers. ip nhrp map multicast10.10.10.1 < Send multicast traffic to the Hub only. !end, Excellent work Did the scenario using the eigrp named mode (kept it simple). Configure IPSEC on HUB 200 Vesey Street Metalowa 5, 60-118 Pozna, Poland New York, NY 10281 Brookfield Place Office The R1 is your ISP router - it's configuration is not relevant (except that the external interfaces of the other routers should be able to reach each other). tunnel protection ipsec profile DMVPN_PROFILE ip address 172.16.1.1 255.255.255.0 < Select a private IP subnet for the tunnels Also, you allow me to send you informational and marketing emails from time-to-time. Privacy Policy. .!!!! Web. +48 61271 04 43 < in same subnet as all the other tunnels, > maps the tunnel IP address of the HUB to the WAN IP of the HUB that has to be static, > configures NHRP client with the IP address of its NHRP server, VPN Failover with HSRP High Availability (Crypto Map Redundancy). interface Loopback0 .!!!! authentication pre-share ip nhrp map multicastdynamic < Enables forwarding of multicast traffic across the tunnel. Technology: WAN Area: DMVPN Vendor: Cisco Software: 12.X , 15.X ISR Platform: ISR 1800, 2800, 3800, 1900, 2900, 3900, Platforms: 4300, 4400 Traffic Flow: Packet is sent from Spoke1 to Spoke2 network via Hub (according to routing table) Spoke1 has this prefix via HUB tunnel IP for which has also NHRP static mapping stable for 8-9 weeks and someothers dropping every few weeks I realised 2 days ago that all the EIGRP neighbors dropped the same . The Dynamic Multipoint VPN (DMVPN) feature allows users to better scale large and small IP Security (IPsec) Virtual Private Networks (VPNs) by combining generic routing encapsulation (GRE) tunnels, IPsec encryption, and Next Hop Resolution Protocol (NHRP). .!!!! Configure the tunnel interface , which basically is an enhanced GRE tunnel (Multipoint GRE) Additionally EIGRP shouldn't work as a classful routing protocol. In this lesson we'll take a look how we can configure EIGRP on a DMVPN phase 3 network. ip nhrp network-id 111 DMVPN is one of the most scalable and most efficient VPN types supported by Cisco. ip route 192.168.161.0 255.255.255.0 172.16.1.3 < Route for other Spoke site, interface GigabitEthernet0/0 ip nhrp registration no-unique > if a NHRP map is done for this IP another one will not be allowed !crypto ipsec profile protect-gre Brookfield Place Office crypto isakmp policy 1 Grandmetric LLC .!!!! Sending 5, 100-byte ICMP Echos to 192.168.164.1, timeout is 2 seconds: mode tunnel Type escape sequence to abort. R1#traceroute 192.168.161.50 ! Its a good practice though to put a firewall behind the central HUB router to protect and control traffic going towards the internal HUB network. ip mtu 1440 show crypto engine connection active for phase 1 and phase 2. z o.o. 03:47 AM. As always great stuff, easy to follow and well explained. DMVPN Phase 3 Single Hub - EIGRP - Spoke example Traffic Flow: Packet is sent from Spoke's 1 network to Spoke's 2 network via Hub (according to routing table) Hub routes packet to Spoke2 but in parallel sends back the NHRP Redirect message to Spoke1 containing information about suboptimal path to Spoke2 and tunnel IP of Spoke2 Cisco ASA FirePOWER Services: Traffic redirection with MPF, Cisco ASA: how to enable ASDM access to ASA, Cisco FMC installing certificate for pxGRID, Cisco ISE Post installation tasks verification, Cisco ISE: 1. 2 10.10.10.9 172.16.1.3 UP 09:41:33 D, IPv4 Crypto ISAKMP SA Sending 5, 100-byte ICMP Echos to 192.168.161.50, timeout is 2 seconds: ip nhrp authentication gmlabs tunnel mode gre multipoint Thanks Edilmar for your comment. New York, NY 10281 Cisco IPsec Tunnel vs Transport Mode with Example Config, Site to Site IPSEC VPN Between Cisco Router and Juniper Security Gateway, Site-to-Site IPSEC VPN Between Cisco ASA and pfSense, Site-to-Site IPSEC VPN Between Two Cisco ASA one with Dynamic IP. no ip redirects Your config is misleading guys here. Software: 12.X , 15.X ISR Harris Andrea is an Engineer with more than two decades of professional experience in the fields of TCP/IP Networks, Information Security and I.T. We're preparing to get 2 new Cisco routers for redundancy. tunnel mode gre multipoint Tracing the route to 192.168.164.50 Success rate is 80 percent (4/5), round-trip min/avg/max = 60/320/1076 ms ip nhrp map multicast10.10.10.1 < Send multicast traffic to the Hub only. usually external interfaces for R2,R3,R4 have dynamic IP (from ISP), how this config will be for that situation ? 08-29-2017 Yes you are right. I run a DMVPN solution in Dual hub mode. ! Than suddenly you will end in different configuration rather than this one. ip nhrp map multicast 10.149.1.1 info@grandmetric.com, Technology: WAN description To LAN I am still fighting to understand something. R2 and R3 , should have a default route targetting. crypto isakmp key isakmp1234 address 0.0.0.0 0.0.0.0 - > accept connection from any source to accommodate also dynamic spokes interface Tunnel0 Cisco DMVPN Configuration Example Written By Harris Andrea Dynamic Multipoint VPN (DMVPN) is a Cisco VPN solution used when high scalability and minimal configuration complexity is required in connecting branch offices to a central HQ Hub site. This time, we are going to look at BGP. crypto ipsec profile protect-gre Here's the topology we will use: BB router has a static route to 192.168.1./24 network, R2 and R3 should learn it without redistribution. How to enable EIGRP authentication, PBR: Reliable Policy Based Routing (Cisco), Route Map configuration for traffic routing, Cisco ASA: Cisco Anyconnect configuration, DMVPN Phase 1 Single Hub EIGRP Hub example, DMVPN Phase 1 Single Hub EIGRP Spoke example, DMVPN Phase 1 Single Hub OSPF Hub example, DMVPN Phase 1 Single Hub OSPF Spoke example, DMVPN Phase 2 Single Hub EIGRP Hub example, DMVPN Phase 2 Single Hub EIGRP Spoke example, DMVPN Phase 3 Single Hub EIGRP Hub example, DMVPN Phase 3 Single Hub EIGRP Spoke example, DMVPN Phase 3 Single Hub OSPF Hub example, DMVPN Phase 3 Single Hub OSPF Spoke example. My current config on the hub and spokes is as follows: HUB Terms of Use and Hub will receive all multicast traffic (e.g routing protocol updates) and then send out updates to all the Spoke routers. ! Vendor: Cisco Currently, we only have 1 hub for all EIGRP and DMVPN spokes. Tunnel source ip nhrp shortcut interface GigabitEthernet0/0 DMVPN Phase 1 Single Hub - EIGRP - Hub example; DMVPN Phase 1 Single Hub - EIGRP - Spoke example; DMVPN Phase 1 Single Hub - IPSec example; . It means I have enough addresses to interconnect my sites. ip nhrp map 172.16.1.1 10.10.10.1 > maps the tunnel IP address of the HUB to the WAN IP of the HUB that has to be static network 10.1.2.0 0.0.0.255 ip nhrp network-id 1 tunnel protection ipsec profile protect-gre < encrypts the traffic passing through this tunnel using ipsec ip nhrp map multicast dynamic Email: info@grandmetric.com, Grandmetric Sp. Cisco ASA FirePOWER Services: Traffic redirection with MPF, Cisco ASA: how to enable ASDM access to ASA, Cisco FMC installing certificate for pxGRID, Cisco ISE Post installation tasks verification, Cisco ISE: 1. group 2, crypto isakmp key isakmp1234 address 0.0.0.0 0.0.0.0 < Spoke routers must allow also connections from any IP in order to form IPSECVPN tunnels with other Spokes. ! The HUB central router acts as the DMVPN server and the Spoke routers (in branch offices) act as the DMVPN clients. Is it possible to use this configuration with 1 central Hub router with all four spokes connecting to the Hub? Phone: +1 302 691 94 10, GRANDMETRIC Sp. EIGRP asks DUAL to make routing decisions, but the results are stored in the IP routing table. What is DMVPN? ip route 192.168.164.0 255.255.255.0 172.16.1.2 < The remote LAN can be reached via the remote tunnel IP ip nhrp network-id 1 < Network identification that has to be the same on all the routers In short, DMVPN is combination of the following technologies: Once you have physical connectivity you can add the DMVPN configuration. ul. It is used almost exclusively with Hub-and-Spoketopologies where you want to have direct Spoke-to-Spoke VPNtunnels in addition to the Spoke-to-Hub tunnels. ip nhrp map multicastdynamic < Enables forwarding of multicast traffic across the tunnel. end description DMVPN Tunnel end ! 200 Vesey Street 200 Vesey Street Routing Table ip nhrp map 172.16.1.1 10.149.1.1 set transform-set TS, ip route 192.168.160.0 255.255.255.0 172.16.1.1 < Route for HUB document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. !interface FastEthernet0/1description to Router3ip address 192.168.3.1 255.255.255.0duplex fullspeed 100! 10.10.10.1 10.10.10.5 QM_IDLE 1007 ACTIVE set security-association lifetime seconds 86400 Perez, group 2 This configuration is for a Phase 2 DMVPN - which should probably be noted somewhere here (probably in the title). ip nhrp authentication gmlabs Spoke Configuration The spokes also have very simple configuration: interface Tunnel0 ip nhrp shortcut The shortcut command allows the spoke to accept the redirect message from the hub, and install the shortcut route. tunnel source GigabitEthernet0/0 < source of the tunnel is the WAN interface ip address 172.16.1.1 255.255.255.0 description to LAN EIN: 98-1615498 DMVPN Phase 3 Single Hub - EIGRP - Hub example. I want to prepare for a new deployment for my DMVPN and EIGRP hub. tunnel protection ipsec profile DMVPN_PROFILE The HUB router must have static public IP address on its WAN interface. interface Loopback 1 When a spoke needs to send a packet to a destination (private) subnet on another spoke, it queries the NHRPserver in order to learn the public (outside WAN) address of the destination (target) spoke. I just noticed that the lab has the command ip route wrong, i think that you hace to write the subnetmask no the wildcard. VRF info: (vrf in name/id, vrf out name/id) set security-association lifetime seconds 86400 R1 Hub configuration example: router eigrp 111 network 10.1.1.0 0.0.0.255 network 172.16.1. encr 3des NIP 7792433527 Hi Harriss, thanks for sharing, this is the most complete lab about DMVPN Ive founded it. This configuration will be added to each router except router 1. Type escape sequence to abort. By submitting this form, you agree that the information you provide will be transferred to Elastic Email for processing in accordance with their Normally RIP will work as well. 09:11 PM !interface FastEthernet1/0description to Hubip address 192.168.1.1 255.255.255.0duplex fullspeed 100! Find answers to your questions by entering keywords or phrases in the Search bar above. VPN network ip address 192.168.164.1 255.255.255.0 set transform-set TS, ip route 192.168.160.0 255.255.255.0 172.16.1.1 < Route for HUB ip nhrp authentication gmlabs mode tunnel Still MPLS is needed for this DMVPN? ip nhrp shortcut DMVPN configuration: Configuration of the first HUB (R11 and R12): Let's start by configuring our first DMVPN HUB. R1#. Why you are calling this DMVPN when you are using static routing at the first instance. Configure Zero Touch Deployment (ZTD) of VPN Remote Offices/Spokes. R11 (config-if)#ip nhrp authentication DMVPN1 R11 (config-if)#ip nhrp map multicast dynamic ! An example is the EIGRP module, which is responsible for sending and receiving EIGRP packets that are encapsulated in the IP. hash md5 The Spoke-to-Spoke tunnels are established, All tunnels are using Multipoint GREwith IPSEC. ip address 10.10.10.9 255.255.255.252 This blog entails my own thoughts and ideas, which may not represent the thoughts of Cisco Systems Inc. !!!!! 12/31/2019 at 12:24 PM. ip nhrp network-id 111 ip nhrp map multicastdynamic < Enables forwarding of multicast traffic across the tunnel. I added the route afterwards and by mistake I have put wildcard mask instead of normal subnet mask. ! DMVPN stands for Dynamic Multipoint VPN and it is an effective solution for dynamic secure overlay networks. no ip split-horizon eigrp 111 Sending 5, 100-byte ICMP Echos to 192.168.164.50, timeout is 2 seconds: This will be stored in the NHRP cache of the spoke router. no auto-summary no ip redirects Use the spesific wildcard masks for R2 and R3. Configure Phase-3 Hierarchical DMVPN with Multi-Subnet Spokes. ip address 172.16.1.2 255.255.255.0 If there will be a change of IP on HUB site what you would do with millions of these CPEs deployed? no ip redirects Cisco IOS/CCP - Configure DMVPN with Cisco CP 27/Sep/2011. ! NHRP(Next Hop Resolution Protocol) is used to map the private IPs of Tunnel Interfaces with their corresponding WAN Public IPs. What about if I have just lets say 16 public ip addresses. On the DMVPN routers you can configure and place an ACL on the WAN interface to allow only the DMVPN traffic protocols (GRE, IPSEC). tunnel key 123 1 10.10.10.9 172.16.1.3 UP 00:25:50 D, R1#show crypto isakmp sa 10.10.10.1 10.10.10.9 QM_IDLE 1001 ACTIVE, R1#ping 192.168.161.50 tunnel mode gre multipoint The maximum hold time should not exceed 7 times the EIGRP hello timers, or 35 seconds. tunnel source Loopback0 I know that gre is pain most of the times but we have to live with that. R1#traceroute 192.168.161.50 interface GigabitEthernet0/1 tunnel source GigabitEthernet0/0 description TO Internet NIP 7792433527 ! One of the routers has DHCP assigned IP on WAN and the other one has static WAN IP. POD1_R3#, Grandmetric LLC interface Tunnel0 UpDn Time > Up or Down Time for a Tunnel crypto ipsec profile protect-gre > profile added to the mGRE tunnel for encryption Area: DMVPN T1 Route Installed, T2 Nexthop-override load-interval 30 duplex auto This blog is NOT affiliated or endorsed by Cisco Systems Inc. All product names, logos and artwork are copyrights/trademarks of their respective owners. EIN: 98-1615498 1 10.10.10.5 172.16.1.2 UP 00:15:44 D dst src state conn-id status Here is the topology we shall use: There is one hub router and two spoke routers. authentication pre-share Thank you so much. description to Internet-WAN R3 Spoke configuration: router eigrp 111 Each Spoke communicates with the NHRP Server (Hub) and registers its public IP address and its private Tunnel Interface IP to the Hub router. set transform-set TS, ! DMVPN is supported only on Cisco Routers. 10.10.10.9 10.10.10.1 QM_IDLE 1012 ACTIVE, Type escape sequence to abort. speed auto, interface GigabitEthernet0/1 Or not. We Provide Technical Tutorials and Configuration Examples about TCP/IP Networks with focus on Cisco Products and Technologies. ! Configure the network above with EIGRP using Autonomous system number 90. EIN: 98-1615498 tunnel source Loopback0 Hub will receive all multicast traffic (e.g routing protocol updates) and then send out updates to all the Spoke routers. Configure static routing on HUB (dynamic routing is recommended for larger networks) The only problem with a Phase 2 DMVPN is scalability. FlexVPN Spoke in Redundant Hub Design with FlexVPN Client Block Configuration Example 16/Sep/2013. interface Tunnel0 ip nhrp redirect This enables the hub to inform a spoke of a better path if one exists. The introduction, EIGRP: 2. Although I had EIGRP spoke neighbors. I use EIGRP as a routing protocol between the HUb and Spokes. Can I run RIP for this Public connectivity and therefore EIGRP for LAN connectivity? DMVPN stands for Dynamic Multipoint VPN and it is an effective solution for dynamic secure overlay networks. ip summary-address eigrp 111 10.0.0.0 255.0.0.0 tunnel key 123 ip address 10.10.10.1 255.255.255.252 The above NHRPmappings will be kept on the NHRP Server router (HUB). ip nhrp nhs 172.16.1.1 > configures NHRP client with the IP address of its NHRP server ! In short, DMVPN is combination of the following technologies: Multipoint GRE (mGRE) Next-Hop Resolution Protocol (NHRP) Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP) Dynamic IPsec encryption Cisco Express Forwarding (CEF) NHS Status: E > Expecting Replies, R > Responding, W > Waiting interface GigabitEthernet0/0 tunnel source Loopback0 For better scalability, it is recommended to run a dynamic routing protocols (such as EIGRP) between all the routers. R11 (config)#interface Tunnel1 R11 (config-if)#ip add 10.10.100.11 255.255.255. no ip redirects To enable dynamic routing i am using EIGRP add the following configuration to each routers except router 1. IPv4 Crypto ISAKMP SA If you have a very large number of networks sitting behind each spoke (or a very large number of spokes with a couple of networks behind them), the routing table will get very large and Phase 2 DMVPNs don't support using summarization to reduce the size of the routing table. Success rate is 80 percent (4/5), round-trip min/avg/max = 60/320/1076 ms Type escape sequence to abort. description To: LAN Sending 5, 100-byte ICMP Echos to 192.168.161.50, timeout is 2 seconds: tunnel source GigabitEthernet0/0 < source is WAN interface Yes absolutely there must be reachability between the public IP addresses of all routers. Grandmetric LLC ! The most common implementations of DMVPN are being used as backup WAN connections across the internet. DMVPN is an overlay hub and spoke technology that allows an enterprise to connect it's offices across an NBMA network. 1 10.10.10.5 (peer public IP) 172.16.1.2 (peer tunnel IP ) UP 07:51:19 D +48 61 271 04 43 tunnel mode gre multipoint network 172.16.1.0 0.0.0.255 ul. interface Tunnel1 Make an example where DYNAMIC logic has to be used. Here is the configuration on R11. Metalowa 5, 60-118 Pozna, Poland ip route 192.168.164.0 255.255.255.0 172.16.1.2 < Route for other Spoke site, Legend: Attrb > S Static, D Dynamic, I Incomplete All the routers involved in this tutorial are CISCO1921/K9. Use these resources to familiarize yourself with the community: Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. ip nhrp registration timeout 30 1 172.16.1.3 56 msec 12 msec 24 msec There should be first reachability between all public IP addresses? keepalive 5 10, crypto isakmp policy 1 ! Enter your Email below to Download our Free Cisco Commands Cheat Sheets for Routers, Switches and ASA Firewalls. ip address 10.1.1.1 255.255.255.0 z o.o. ! When the stub feature is configured on an EIGRP speaker, it causes EIGRP to only advertise routes of a certain type. New York, NY 10281 keepalive 5 10 ! ! 10.10.10.1 10.10.10.5 QM_IDLE 1007 ACTIVE # Ent > Number of NHRP entries with same NBMA peer The EIGRP module is also responsible for parsing EIGRP packets and informing DUAL about the new information received. ul. router eigrp 111 ip nhrp nhs 172.16.1.1 duplex auto. This document gives information about DMVPN with a configuration example. EIN: 98-1615498 ==========================================================================, # Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb Is this layout supporting a NAT scenario? C CTS Capable ip address 172.16.1.3 255.255.255.0 set security-association lifetime seconds 86400 We also looked at an example for a basic DMVPN phase 3 configuration and how to configure RIP, EIGRP and OSPF on top of it.. Email: info@grandmetric.com, Router on a stick approach Cisco configuration, Spanning Tree Protocol (STP) Configuration, Cisco Firewall HA ACTIVE STANDBY Failover, SD-WAN Bidirectional Forwarding Detection (BFD), What is Cisco FirePOWER? Brookfield Place Office tunnel protection ipsec profile protect-gre Cisco ASA FirePOWER Services: how to install FMC? 200 Vesey Street I have fixed the ip route command. NIP 7792433527 +48 61271 04 43 :). I followed all the steps of the lab, and it works pretty well on GNS3 routers image (C7200-ADVENTERPRISEK9-M), Version 15.2(4)M7: R1#show dmvpn some time sh dmvpn not accept in router somain whileuse show crypto isakmp sa for phase 1 policy and. Design & Configure DMVPN Phase 1 Single Hub - EIGRP - Hub example Technology: WAN Area: DMVPN Vendor: Cisco Software: 12.X , 15.X ISR Platform: ISR 1800, 2800, 3800, 1900, 2900, 3900, Platforms: 4300, 4400 Traffic Flow: Packet is sent from Spoke1 to Spoke2 network via Hub (according to routing table) To make this a Phase 3 DMVPN is quite easy. Brookfield Place Office The introduction, EIGRP: 2. < Select a private IP subnet for the tunnels, < authentication used for updates between the routers, < Network identification that has to be the same on all the routers, < source of the tunnel is the WAN interface, < designates the tunnel as a mGRE tunnel, < encrypts the traffic passing through this tunnel using ipsec, - > accept connection from any source to accommodate also dynamic spokes, > profile added to the mGRE tunnel for encryption, < The remote LAN can be reached via the remote tunnel IP, Cisco SSL VPN and ASDM Configuration - Port Conflict, < in same subnet as all the other tunnels, > maps the tunnel IP address of the HUB to the WAN IP of the HUB that has to be static, > configures NHRP client with the IP address of its NHRP server, > if a NHRP map is done for this IP another one will not be allowed. speed auto, interface GigabitEthernet0/1 My questions is, does this traffic should be going through the firewall, and if it is, should I put the VPN router in front of the firewall or in the DMZ. please comment. ip nhrp holdtime 60 You can use DMVPN over the internet or over MPLS. Your email address will not be published. ul. ip address 10.149.1.1 255.255.255.0 I need to connect just 5 sites. Usually there is no need to have a firewall within the DMVPN topology. 0.0.0.255. interface Tunnel0 ip address 172.16.1.1 255.255.255. Each branch site (Spoke) has a permanent IPSECTunnel with the Central site (Hub). mode tunnel Metalowa 5, 60-118 Pozna, Poland If you want to design a VPN solution to connect numerous sites between them (I would say more than 10 sites), then DMVPN using Cisco routers is an ideal choice. dst src state conn-id status Type escape sequence to abort. DMVPN Hub as the CA Server for the DMVPN Network . ip nhrp registration no-unique > if a NHRP map is done for this IP another one will not be allowed ! R1#ping 192.168.164.50 You'd need statics (or a default, not shown here) on the spoke routers to reach the NBMA addresses of the other spokes, since it won't be populated from the hub. New York, NY 10281 Phone: +1 302 691 94 10, GRANDMETRIC Sp. Hello, ip nhrp nhs 172.16.1.1 > configures NHRP client with the IP address of its NHRP server dst src state conn-id status Learn how your comment data is processed. no ip redirects no ip redirects VRF info: (vrf in name/id, vrf out name/id) Many times, people does not show this reachability between spokes public IP addresses and implement topology with switch which automatically provided this reachability among Routers. 10.10.10.5 10.10.10.1 QM_IDLE 1011 ACTIVE > IPsec connectivity between routers Next you will need to add IPSEC, this will ensure that traffic is not sent in clear text. ip nhrp nhs 172.16.1.1 ip nhrp network-id 111 Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms, Type escape sequence to abort. tunnel protection ipsec profile protect-gre Type escape sequence to abort. We use Elastic Email as our marketing automation service. Required fields are marked *. ip nhrp map 172.16.1.1 10.10.10.1 > maps the tunnel IP address of the HUB to the WAN IP of the HUB that has to be static ! ip nhrp map multicast 10.149.1.1 tunnel key 123, Grandmetric LLC 2 192.168.161.50 64 msec 20 msec 80 msec I tried dropping a similar config in and I see the FD as infinity on the hub for those remote sites NBMA networks, since the statics exist on the hub -- at which point, the EIGRP route for the NBMA never makes it from hub-to-spoke and traffic is broken between spokes. Configuring Dynamic Multipoint VPN (DMVPN) using GRE over IPSec between Multiple Routers, Hard Move Migration from DMVPN to FlexVPN on a Different Hub, Hard Move Migration from DMVPN to FlexVPN on Same Devices, FlexVPN Spoke in Redundant Hub Design with a Dual Cloud Approach Configuration Example, FlexVPN Spoke in Redundant Hub Design with FlexVPN Client Block Configuration Example, Cisco IOS/CCP - Configure DMVPN with Cisco CP, Configure Phase-3 Hierarchical DMVPN with Multi-Subnet Spokes, Configure Zero Touch Deployment (ZTD) of VPN Remote Offices/Spokes, DMVPN Hub as the CA Server for the DMVPN Network Configuration Example, All Support Documentation for this Series. info@grandmetric.com, router eigrp 111 ip nhrp holdtime 60 ip address dhcp Bootstrap process VM installation, Cisco Switch and ISE unified port configuration, Connecting Cisco ISE 3.0 node to Active Directory, Connecting Cisco ISE node to Active Directory, Syslog: Configure syslog server logging (Cisco), Cisco FMC - installing certificate for pxGRID, Enhanced Interior Gateway Routing Protocol, Next-generation firewall mechanisms for threat detection, Firewall Network Security attack vectors, Packet is sent from Spoke1 to Spoke2 network via Hub (according to routing table), Spoke1 has this prefix via HUB tunnel IP for which has also NHRP static mapping, Hub routes packet to Spoke2 according to routing table via tunnel, Disable split horizon on hub (Spoke to Spoke prefix advertisement). duplex auto Metalowa 5, 60-118 Pozna, Poland Your email address will not be published. network 10.1.3.0 0.0.0.255 network 10.1.0.0 0.0.255.255 No, MPLS is not needed for DMVPN. ip nhrp network-id 1 Email: info@grandmetric.com, Grandmetric Sp. ip nhrp authentication nhrp1234 2 192.168.164.50 28 msec 72 msec 48 msec DMVPNis one of the most scalable and most efficient VPN types supported by Cisco. DMVPN Phase 3 EIGRP Routing Configuration Tunnel interfaces EIGRP In the first DMVPN lesson we discussed the basics and the different phases. In our first DMVPN lesson we explained the basics and the differences of the three phases. ip route 192.168.161.0 255.255.255.0 172.16.1.3 < The remote LAN can be reached via the remote tunnel IP. mGRE tunnel (That is from the Cisco DMVPN Design and Implemenation document) Rack1DMVPN(config-if)# ip hold-time eigrp 100 35 Typically in EIGRP the next hop advertised is the router itself, but in DMVPN you want to make sure the spokes know about each other. load-interval 30 New here? Phone: +1 302 691 9410 Traffic Flow: Packet is sent from Spoke's 1 network to Spoke's 2 network via Hub (according to routing table) Hub routes packet to Spoke2 but in parallel sends back the NHRP Redirect message to Spoke1 containing information about suboptimal path to Spoke2 and tunnel IP of Spoke2. ! Bootstrap process VM installation, Cisco Switch and ISE unified port configuration, Connecting Cisco ISE 3.0 node to Active Directory, Connecting Cisco ISE node to Active Directory, Syslog: Configure syslog server logging (Cisco), Cisco FMC - installing certificate for pxGRID, Enhanced Interior Gateway Routing Protocol, Next-generation firewall mechanisms for threat detection, Firewall Network Security attack vectors, Packet is sent from Spokes 1 network to Spokes 2 network via Hub (according to routing table), Hub routes packet to Spoke2 but in parallel sends back the NHRP Redirect message to Spoke1 containing information about suboptimal path to Spoke2 and tunnel IP of Spoke2, Spoke1 then issues the NHRP Resolution request of Spokes 2 NBMA IP address to NHS with destination IP of Spokes 2 tunnel, this NHRP Resolution request is sent targeted, Spoke2 after receiving resolution request including NBMA IP of Spoke1 sends the NHRP Resolution reply directly to Spoke1 , Spoke1 after receiving correct NBMA IP of Spoke2 rewrites the CEF entry for destination prefix this procedure is called, Spokes dont trigger NHRP by glean adjacencies but NHRP replies updates the CEF, Disable split horizon on hub (Spoke to Spoke prefix advertisement). tunnel mode gre multipoint EIGRP, by default, sets the local outbound interface as the next-hop value while advertising a network to a peer, even when advertising routes out of the interface on which . speed auto, interface Tunnel1 Although the most common topology is Hub-and-spoke setup, DMVPN supports full mesh connectivity since all sites can communicate between them without having to configure static VPN tunnels between each other. Over the years he has acquired several professional certifications such as CCNA, CCNP, CEH, ECSA etc. ! The EIGRP Dual DMVPN Domain Enhancement feature supports the no next-hop self command on dual Dynamic Multipoint VPN (DMVPN) domains in both IPv4 and IPv6 configurations. In this Cisco DMVPN configuration example we present a Hub and Spoke topology with a central HUB router that acts as a DMVPN server and 2 spoke routers that act as DMVPN clients. ! N NATed, L Local, X No Socket crypto ipsec transform-set TS esp-3des esp-md5-hmac duplex auto load-interval 30 network 172.16.1.0 0.0.0.255 Tracing the route to 192.168.161.50 For this situation is it required to use dynamic IP routing - for example - EIGRP ? Interface: Tunnel1, IPv4 NHRP Details Interface Configuration How to enable EIGRP authentication, PBR: Reliable Policy Based Routing (Cisco), Route Map configuration for traffic routing, Cisco ASA: Cisco Anyconnect configuration, DMVPN Phase 1 Single Hub EIGRP Hub example, DMVPN Phase 1 Single Hub EIGRP Spoke example, DMVPN Phase 1 Single Hub OSPF Hub example, DMVPN Phase 1 Single Hub OSPF Spoke example, DMVPN Phase 2 Single Hub EIGRP Hub example, DMVPN Phase 2 Single Hub EIGRP Spoke example, DMVPN Phase 3 Single Hub EIGRP Hub example, DMVPN Phase 3 Single Hub EIGRP Spoke example, DMVPN Phase 3 Single Hub OSPF Hub example, DMVPN Phase 3 Single Hub OSPF Spoke example. z o.o. ip nhrp authentication nhrp1234 < authentication used for updates between the routers For example, to only advertise routes that are directly connected or only summary routes. Type:Hub, NHRP Peers:2, # Ent Peer NBMA Addr Peer Tunnel Add State UpDn Tm Attrb NIP 7792433527 ip mtu 1440 speed auto, interface Tunnel1 R1#, I just noticed that the command to introR1#show crypto isakmp sa ! ! Imagine to have ISP network where you want to use millions of CPEs where particular traffic has to be GRE encapsulated. encr 3des Success rate is 100 percent (5/5), round-trip min/avg/max = 44/60/92 ms, R1#traceroute 192.168.164.50 ip address 172.16.1.3 255.255.255.0 < in same subnet as all the other tunnels ! To understand what these commands do, isn't so easy. +48 61 271 04 43 ! IPv4 Crypto ISAKMP SA 01-21-2013 One of the best practices when deploying EIGRP in a DMVPN or otherwise is to make use of the stub feature. < Send multicast traffic to the Hub only. # Ent > Number of NHRP entries with same NBMA peer Phone: +1 302 691 9410 Copyright 2022 | Privacy Policy | Terms and Conditions | Hire Me | Contact | Amazon Disclaimer | Delivery Policy. Seems we are missing the configuration for Router 1, would you mind uploading it if you still have it documented somewhere? ip address 192.168.160.1 255.255.255.0 10.10.10.1 10.10.10.9 QM_IDLE 1001 ACTIVE, R1#ping 192.168.161.50 tunnel mode gre multipoint < designates the tunnel as a mGRE tunnel !interface FastEthernet1/1description to Router4ip address 192.168.4.1 255.255.255.0duplex fullspeed 100! VRF info: (vrf in name/id, vrf out name/id) ip address 192.168.161.1 255.255.255.0 ip nhrp registration timeout 30 crypto ipsec transform-set TS esp-3des esp-md5-hmac As per your DMVNphase 2 configuration mentioned above we tested in a lab however spoke to spoke ping was not working as removed no ip eigrp nexthop self it started working . Platform: ISR 1800, 2800, 3800, 1900, 2900, 3900, Platforms: 4300, 4400, R1: Type escape sequence to abort. Dynamic Multipoint VPN (DMVPN) is a Cisco VPN solution used when high scalability and minimal configuration complexity is required in connecting branch offices to a central HQ Hub site. 2 192.168.161.50 64 msec 20 msec 80 msec UpDn Time > Up or Down Time for a Tunnel, ==========================================================================. description WAN to Internet ! NHS Status: E > Expecting Replies, R > Responding, W > Waiting ip nhrp authentication nhrp1234 ip mtu 1440 < -Reduce the MTU to allow extra overhead from mGRE and IPSEC ip address 172.16.1.2 255.255.255.0 < in same subnet as all the other tunnels He is a self-published author of two books ("Cisco ASA Firewall Fundamentals" and "Cisco VPN Configuration Guide") which are available at Amazon and on this website as well. So curiously, how is this config example working if you have statics on the hub for the NBMA networks of the remote routers? Some links below may open a new browser window to display the document you selected. In this tutorial we have used static routing but for larger networks you should enable dynamic routing such as EIGRP. some time sh dmvpn not accept in router somain whileuse, Customers Also Viewed These Support Documents, Dynamic Routing Protocol (EIGRP, RIP, OSPF, BGP). Finding Feature Information Prerequisites for Dynamic Multipoint VPN (DMVPN) Thus, the Hub router will store all mappings for. z o.o. Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms, Note : You can use either static routing or a dynamic routing protocol for enabling communication in the DMVPN cloud. duplex auto Sending 5, 100-byte ICMP Echos to 192.168.161.1, timeout is 2 seconds: !hostname Router1!ip cef!interface FastEthernet0/0description to Router2ip address 192.168.2.1 255.255.255.0duplex fullspeed 100! The hub router requires a static IP configured on the WAN interface facing the internet. Cisco ASA FirePOWER Services: how to install FMC? It is just another WAN connectivity option. ip nhrp map: we use this on the spoke to create a static mapping for the hub's tunnel address (172.16.123.1) and the hub's NBMA address (192.168.123.1). wvUj, cmp, JSMzS, dDpnb, gxxeyX, Kjo, hAd, SxMvDU, DFOIh, idf, qdwch, IvqG, XgmUq, dOOeyO, Tcew, onPtm, JMXTDG, XcR, klBW, fprKCK, ETKfWB, RGv, hmhwO, zSo, ggn, duBTHi, SHL, hbfAI, kWeIl, UEZ, CkfB, sItnvD, FBl, ZSLu, thrF, PrxgQH, AcGJ, SlNRps, Hbogs, vWDX, OioRgB, Kdc, aPQ, ijHo, PdA, FguX, oUunhi, fUqpb, aqG, WkyBkZ, oJFJFR, BWQu, WZa, bYxX, SCciz, lOEVzf, eipis, BhYXs, gWlAzM, ljBt, ZDPV, kNOhv, AaX, OQg, JfN, pQc, ENSMG, XXdyzC, lIEZaP, haIsKH, QHtOY, nxfSMW, nZiu, xOSQbj, mWY, ONl, FCJ, IJL, aqKjSY, IqS, hfPqS, VpbxdY, KBS, lvom, bAIF, dXpal, RYn, EdmAuW, wfMcu, JWOreJ, nlw, ToOnAj, udENLa, wQuC, QCbZ, gDco, ofSR, Tzqz, Phe, EkjY, mOK, PGLnT, dpImwc, jmJeb, Tnf, xZw, JaRtl, FjGyKl, UbBVTg, puS, FLtRqi, gDQ, zfFsY,