OSPF can cross VPNs without extra setup. But only over VPN Tunnel Interfaces. (note there is a bug with this on the latest version) You shouldn't have any issues on a straight MPLS connection unless you are adding additional encryption to the connection. Having only have a single path to each site doesn't make sense for OSPF.
config vpn ipsec phase2-interface edit "dial-up-p2" set phase1name "dial-up" set proposal 3des-sha1 aes128-sha1 next end: 2. Configuring OSPF in FortiGate 1: Go to System > Status to look for the CLI Console widget and create OSPF route. config router ospf set router-id 172.20.120.22 config area edit 0.0.0.0 next end config network edit 1 Site-to-Site VPN with OSPF. In this example, each site uses OSPF for dynamic routing of traffic. The tunnel IP address on each VPN peer is statically assigned and serves as the next hop for routing traffic between the two sites. Configure the Layer 3 interfaces on each firewall. Select . OSPF over VPN is required if we are running OSPF inside our network and we need to extend the OSPF network to the other end of the site as well. By configuring the OSPF over VPN dynamically the sites can be added to route the VPN traffic. Configuration. To configure OSPF on the MX, navigate to Security & SD-WAN > Configure > Site-to-site VPN > OSPF settings.. Enabling Advertise Remote routes will provide additional configuration options: . Router ID: The OSPF Router ID that the MX will use to identify itself to neighbors. Area ID: The OSPF Area ID that the MX will use when sending route advertisements. This article describes how to configure OSPF over dynamic IPSEC VPN. The setup includes single spokes with hub location which would be assigning IP addresses to the spokes via dial-up VPN. A dynamic IPsec tunnel will be established which will allow OSPF through it. Solution. Hub Configuration. 1) Configure VPN phase-1. # config vpn ipsec phase1 OSPF Hello messages are sent over multicast by default. However, IPSec does not support multicast over a VPN tunnel. Consequently, OSPF adjacency using multicast cannot be established over IPSec VPN tunnels. Cisco ASA provides a solution to this problem by supporting the configuration of statically defined neighbors with the neighbor command. A typical use case for this is when router is sourcing OSPF packets and traffic selectors for IPsec allows OSPF packets (protocol number 89, group 224.0.0.5 & 224.0.0.6). As of release 12.4(9)T those packets will be put into the tunnel and encrypted.
Site-to-Site VPN with OSPF Failover.pdf. Choose Language. Multi-Site Dual ISP Redundant Site-to-Site VPN with OSPF Failover. 16568. Created On 09/25/18 17:41 PM - Last Updated 04/20/20 23:58 PM. VPNs Resolution. This document covers the configuration of a multi-site VPN scenario with dual ISPs and quadruple VPN tunnels at each site.
This example shows how to setup an IPSec VPN using dynamic routing protocol (RIP), it can be used with another protocol. In this example you can find a setup between Mikrotik and Cisco routers, but it can be done just between Mikrotik routers, but to be more colorfull I decided to use Mikrotik and Cisco.
3) Also OSPF over IPSEC VPN between two sites, they can discover neighbour dynamically. There is not need to specify the neighbours manually. Yes, OSPF will autmotically discover the neighbours. No need to specify neighbours. Hope this helps. Regards, Visitor
OSPF Hello messages are sent over multicast by default. However, IPSec does not support multicast over a VPN tunnel. Consequently, OSPF adjacency using multicast cannot be established over IPSec VPN tunnels. Cisco ASA provides a solution to this problem by supporting the configuration of statically defined neighbors with the neighbor command. A typical use case for this is when router is sourcing OSPF packets and traffic selectors for IPsec allows OSPF packets (protocol number 89, group 224.0.0.5 & 224.0.0.6). As of release 12.4(9)T those packets will be put into the tunnel and encrypted. Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway Step 6.4 - Configure OSPF VPN Network In HQ Backup Router Device. If OSPF route advertisement is not being used, static routes directing traffic destined for remote VPN subnets to the MX VPN concentrator must be configured in the upstream routing infrastructure. If OSPF route advertisement is enabled , upstream routers will learn routes to connected VPN subnets dynamically. Check the following when the VPN tunnel is up but the VPN Tunnel Interface is unable to form neighborship: Make sure the interface the VPN is bound to is not configured in L2 Bridged Mode. Make sure the VPN Tunnel Interfaces are in the same OSPF Area; OSPFv2 Areas Type must have the same area type on both sites. (Normal, Stub Area, Totally