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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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 ...
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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 ...
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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 > ...
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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 can I limit OSPF route visibility between different areas?

I have a fairly simple network setup as seen in the attached image. The network is spread across two more or less similar data centers which are connected via a static OpenVPN tunnel. Both the VPN ...
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Centos 7.3 Quagga (ospf) configuration changes after reboot

I have configured ospf as shown below: cat /etc/quagga/ospfd.conf ! ! Zebra configuration saved from vty ! 2017/05/31 10:13:20 ! ... ... ... ! interface foo1 description Tunnel foo1 ip ospf cost ...
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Quagga OSPF not updating

TL;DR: routing daemon not updating tables. Help! Consider two different Linux vm's configured for routing, R1 and R2, which are directly connected on 10.0.0.0/24. Each has other networks on their ...
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Cannot ping an ip of router

my issue is: r1 ping r4(em0) will lost the first packet r2 ping r3(em0) will lost the first packet too r3 cannot ping r2(eth0) r4 cannot ping r1(eth0) there are 4 routers, and connected with openvpn(...
Fisher Wei's user avatar
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internet access for system over multiple hops of ipsec using GRE and OSPF

I have the following setup: linux client @ 172.16.10.68 linux gateway @ 172.16.10.69, ipsec tunnel to aws box #1, gre tunnel 10.254.0.0/30 aws box #1, ipsec tunnel from linux gw, ipsec tunnel to ...
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Routing Issue - can't ping gateway from other routers in full mesh

I am setting up a new network. I have 4 routers in a full mesh. Edge1, Edge2, Client1, Client2. This are Mikrotik Cloud Core Routers (not that it matters). They are set up with OSPF (distributing ...
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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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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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How to properly include vlan configuration for preexisting OSPF routing in PT

I am using packet tracer to simulate an enterprise setting. There would be a "main" office (marked as Bgta) and other minor offices in other cities, such as Mdlln. In the main office there ...
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Quagga OSPFv3 does not update IPv6 routes

NOTE: I've posted this on SuperUser but reposting here because I think it may be more suitable. I'm trying to configure Quagga to use OSPFv3 to create proper IPv6 routes between two OpenWrt routers ...
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how to reach a subnet using a parent router via OSPF

I am trying to configure OSPF (using bird) to reach a subnet from a router that has no direct connection to the node with the subnet, something like this: The AS has two networks, but for testing ...
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Nagios on a virtual network

I am trying to emulate a virtual network in Kathara (ex. NetKit), based on OSPF and BGP routing and I am new to this. After emulating the network I need to monitor it using Nagios, but my question is ...
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How to add the normal routing information of a router to BIRD?

Suppose the following network layout: R1: R2: 10.1.1.0/24 <--- 10.1.1.1, 192.168.1.1 <----------> 192.168.1.2, 10.1.2.1 ---> 10.1....
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How to configure bird OSPF for ipip link?

I have a simple ipip tunnel between 192.168.56.254/31 and 192.168.56.255/31. My simple test config on 192.168.56.254/31 looks like: protocol ospf test { import none; export none; ...
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quagga ospf max-metric option messing up outbound routes

We have a number of machines which are connected to both a high-speed and a low-speed network; other machines are only on the low-speed network. I'm investigating deploying OSPF so that each ...
Bruce Merry's user avatar
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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 ...
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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 ...
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view the maximum equal cost paths configured for OSPF

How do you check if the maximum number of equal cost paths has been modified (with the (config-router)# maximum-paths command)? Is the only way by viewing the running configuration? show ip ospf ...
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Filter OSPF routes redistributed by BGP

I am redistributing OSPF routes inside a network, through BGP. However I don't want to redistribute all the advertised routes from OSPF (specificaly the private networks) to the outside of the AS. How ...
João Rodrigues's user avatar
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Need advice on Juniper OSPF networking

I have been thrown in to this project because of a coworker's termination. I have a set of Juniper SRX 550 Routers. I need to create an OSPF network that passes all traffic (All subnets) as if it ...
Russell G.'s user avatar
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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 -...
exxodus7's user avatar
-2 votes
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SPF Error with redirection

so I have this crazy SPF-Policy problem which looks like that: I have a private domain like 'my-private-domain.com'. This one I'm hosting myself on a vServer and I activated SPF and added the SPF ...
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