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Questions tagged [ospf]

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

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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) has worked for me. Any idea? Both the incoming…
Malathi
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Load balancing across uneven links (Cisco\OSPF)

I know that OSPF will load balance across equal cost paths such as: R1 ------------------ R3 | 100mbit | | | | 1gbit| |100mbit | | | | 1gbit …
quaGGkkkkkd
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OSPF routers (with BIRD on debian) recognize each other as neighbors but can't ping each other

I've created a "line" topology using virtual box - creating 4 machines and making a separate link between each using internal networks - R1 (eth0, 10.0.1.1) <-> (eth0, 10.0.2.1) R2 (eth2, 10.0.2.2) <-> (eth0, 10.0.3.1) R3 (eth2, 10.0.3.2) <-> (eth0,…
pldimitrov
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redistribution OSPF RIP of directly connected networks

I am trying to learn redistribution between RIP and OSPF. I am using packet tracer. I have one router BRANCH that is configured with RIP v2. On fa0/0 there is the network 172.16.56.0/25, on fa0/1 the network 172.16.54.0/23. BRANCH is connected via…
lucaConfa
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How to redistribute connected /32 with quagga ospfd?

I have a VM host which acts as a quagga router. It announces routes to its hosted VM's (I don't use bridges, only routed VM's) It works well when tun interface is configured with a /30 ; for example : $ ip a 4: gentoo:…
Bastien Durel
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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.
echedey lorenzo
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What are the advantages of OSPF vs nexthop self with iBGP?

Assuming I have a fairly small network internally, but I have 4 routers each connected out to a different network. The routers are all sat next to each other connected via a switch. Each router uses BGP to speak to the outside networks. There is an…
Matt Hamilton
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Unequal Cost Load Balancing via MPLS TE

Given the following network, with all sites' network routing tables built via OSPF: Site_A | Site_A_router | \ | Intermediate_site_C_router -- Other_sites | | | Intermediate_site_D_router …
Oesor
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Cisco IOS command : default-information originate vs redistribute static

I am quite confusing with the Cisco IOS command. what's the actual difference between redistribute static as i learn in EIGRP whereas default-information originate in RIP/RIPv2/OSPF? I hope to get some answer over here as i can't find the difference…
hinloong
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How do I get started with setting up OSPF?

I'm a sys admin by trade but I've been tasked with heading up a team that will be implementing OSPF between the different offices in our company. I don't have any experience with OSPF so I'm not sure what all needs to be done to bring this project…
Luniz
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Tough routing problem with Linux, Quagga and OpenVPN

The Setup I have an OpenVPN server that acts as a central router. It is configured with "topology subnet" command. Clients are Debian Linux nodes and each have one (or more) subnets directly connected to them. The objective is for any client…
Antoine Benkemoun
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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 our public subnet? I found some other questions…
Shtééf
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IPv6 Forwarding working 1 way externally

Originally Asked on Network Engineering but told to ask on here instead. I'm having a problem with routing my own ipv6 prefix for anycast. I got my ASN and IPV6/48 sponsored with RIPE and I am struggling to get it to work properly. Any pointers of…
Entrepreneur AJ
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Strange Path Selection in WatchGuard OSPF

I am trying to configure OSPF between some cisco CPE routers and two WatchGuards. Already tried quite a lot of different setups, already trying to change network design, unfortunately every time I have the same result. Below I have drawn the network…
Dexterite
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IPv6 network connectivity - Configuration issues

I have a simple network as shown in the attached figure. I am having connectivity issues between different end hosts. Can anybody spot what might be the problem? I am using Linux machines as Routers with Quagga installed. Quagga is using OSPF for…
Khawar
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