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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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What is the difference between BGP and OSPF?

I want to setup a dynamic routing network， I want to know, What is the difference between BGP and OSPF ? Does both two need to be used together commonly ?
larry
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What happens in the real world Internet - BGP and OSPF?

I have never worked on the customer premises, but my assumption is that one service provider runs IGP services internally - For example - OSPF or IS-IS. Now, when one service provider has to reach another service provider to communicate server on…
dexterous
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What is the difference between OSPF and RIP?

What is the difference between OSPF and RIP? Could someone explain the advantages and disadvantage？ Also when I should use one or the other.
Grace
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When to start using OSPF

We have 4 offices in different countries. They are all connected via VPN to each other (i.e. at least one VPN tunnel from each office to all other three). Each office has between 1 and 4 separate subnets, and each office has an OpenVPN server. Two…
wolfgangsz
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How to find which routing protocol a router is using. And if found how to test it

I was recently asked a networking question in an interview which I did answer but the interviewer was not pleased. The question was : "Given an actively running router, how would you know what routing protocol is the router using, specifically how…
pradaa
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How to advertise routes to IPSec tunnels in OSPF using Cisco IOS

I have Cisco 1800 series router (running C181X-ADVIPSERVICESK9-M) with lots of IPSec tunnels. I want to add this router to OSPF and configure it to advertise routes to remote subnets accessible via IPSec tunnels (e.g. if I have tunnel VPN1 with…
DavisNT
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Monitoring OSPF links with SNMP

I am looking for a way to monitor OSPF links using SNMP. I have attempted to try to poll the Neighbor State of a specific peer, looking for a value of Full, and going into alarm once the value is no longer Full, but when the trunk goes down, the…
n0sw1tchp0rt
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Linux - Traffic Engineering

I have a Linux box with 8 network interfaces: 3 interfaces are connected to 3 different ISPs, one interface is the default gw interface. Use NAT for outgoing packages. Internally, I use the dynamic routing protocol. When I receive external traffic…
Gli Illuminati
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Multiple OSPF Routers (Quagga and hardware) in one subnet

Copied from NetworkEngineering since they said it is off-topic there. Network Diagram: We have two OpenVPN servers that are currently accessible with static routes from the two core routers and I am trying to set them up with OSPF using Quagga (FRR…
yakatz
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ping between ipv6 and ipv4 networks

I have 2 networks (one ipv4 and one ipv6) , I used ospf as routing protocol for both networks. I activate bgp between this 2 networks(R6 and R1) and now R6 can ping the full ipv6 network and R1 can ping the full ipv4 network. Now I want r7 to ping…
sara
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How any routing protocol packet reaches(flows of operations) from NIC card (physical layer) to any Routing (OSPF/RIP/BGP) daemon?

The problem is rearding the routing protocol packet flow in any linux/unix device where multiple routing protocol daemons are running. How any routing protocol packet reaches(flows of operations) from NIC card (physical layer) to any Routing…
mav_2k
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OSPF among Cisco and Juniper

Below are snippets of ospf configs among Cisco and Juniper devices. However, not all are seeing each other in "show ip ospf", especially the redistributed routes into ospf. I'm sure the router id(s) are unique and all have overlapping areas to begin…
user192756
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Quagga, OSPF, announcing inactive tunnel

I have a 3 node network with OSPF Quagga running on each of them. Each node connected with p2p, OpenVPN: http://vetal.ca/Download/img/Network_loop.png (Will embed picture here when have reputation > 10) pfSense has two OpenVPN clients, with ip…
Vetal
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Wireshark Capture Between Two Routers

How would one go about capturing OSPF traffic in Wireshark between two routers? I'm looking to do something like this: [RTR A] - - - [LAPTOP] - - - [RTR B]
THE DOCTOR
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Prevent Quagga from a certain subnet advertising

I have an Ubuntu 12.10 workstation with the following interfaces: eth0 : 10.11.1.15/24 lo:1 : 10.90.50.50/32 lo:2 : 10.1.100.100/32 tap0 : 10.5.200.200/24 As you can see, all IPs fit in 10.0.0.0/8 subnet. Also I have Quagga on it that announces my…
Fmy Oen
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