OSPF (Open Shortest Path First) is a link state routing protocol for interior routing within single autonomous system (AS).

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EIGRP Neighbor State

I understand that OSPF has states that describe the status of a neighbor (e.g. Init and Full). Does EIGRP also have similar information? I'm programmatically trying to get the status of an EIGRP ...
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How to configure machines in a public subnet with two gateways?

We have a single public /24 subnet, with a BGP router as the primary gateway. Now I'm interested in configuring a second router for redundancy. How do I deal with multiple gateways on the servers in ...
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Reachability with OSPF on firewalled network

I'm trying to figure out how OSPF establishes routes when used on a network with firewalls. Say I have four routers (A, B, C, and D) and two firewalls (F1 and F2), arranged like so: (LocalA) A - F1 ...
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ospf hello not forwarded

I am trying to change the destination ip of ospf hello packet (224.0.0.5) to link local address using iptables rule (DNAT) . It does not seem to work. A similar rule for unicast packet (BGP control) ...
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OSPF on XEN host running several VMs

Is it possible to set OSPFs areas in a XEN environment to setup a virtual cluster? Main intention is to avoid a external router since all VMs will run inside the same machine.
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Packet captures of OSPFv2 with HMAC-SHA1 (RFC5709)

I'm looking to get my hands on packet captures showing a hello packet from OSPFv2 configured to use HMAC-SHA1 for authentication, or to find software that supports such a mode that I could use to ...
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How to correctly summarise routes in an OSPF multi-hub-and-spoke scenario?

I am looking at using OSPF/Quagga to provide high availability between a backbone and multiple remote locations (via GRE). I'm unable to get route summarisation working (forgive me if not the correct ...
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DMVPN and OSPF (two tunnels dynamic routing)

please help me to resolve the problem with routing between dmvpn GRE tunnels. I've got a DMVPN HUB and SPOKE topology. HUB has public ip address in internet. SPOKE has two ISPs for redundancy. I've ...
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split ospf domain in two ospf domains interconnected with bgp (BIRD)

I have created a line topology consisting of 4 ospf routers (VMs running debian with the BIRD routing daemon): R1 (10.0.1.1) <-> (10.0.1.2) R2 (10.0.2.1) <-> (10.0.2.2) R3 (10.0.3.1) <-> ...
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Is it possible to use a LAN in a VRF to administrate MPLS backbone?

In this topology, the customer connections and Internet access are working for everyone. The problem is that I need the LAN in VRF3(SITIO3) to have access to the ISP MPLS backbone (4 PE routers, 2 P ...
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Locating OSPF LSA Flooding In Wireshark

How can I identify the OSPF LSA flooding traffic which occurs every 30 minutes from a Wireshark capture? I'm finding it difficult to locate where the start and stop of this flooding process occurs in ...
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How to relate entries in the OSPF-MIB::ospfIfTable to entries in the OSPF-MIB::ospfNbrTable

I'm in an environment with routers from multiple vendors (Cisco, Brocade, etc.). I'm trying to use SNMP to retrieve information that is roughly equivalent to what you can get from the CLI commands ...