OSPF (Open Shortest Path First) is a link state routing protocol for interior routing within single autonomous system (AS).
Questions tagged [ospf]
47 questions
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Juniper: How to see OSPF routes that didn't make the routing table
I have a specific scenario:
There are 2 paths leading to a given OSPF prefix:
-Both of the paths are learnt via OSPF
-Prefix CIDRs are the same size
-Both OSPF "preference" value is unchanged (so is the default: 10)
My problem is that only a single…
Woodkid
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How activate OSPF in a router Cisco-IOS-XE using RESTCONF?
I'm trying to activate OSPF routing protocol in a router using a python script with restconf. I send the request to this url https://(router ip)/restconf/data/Cisco-IOS-XE-ospf-native-router:10 but i get this return message: { …
lost on internet
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OSPF area topology
While reading about OSPF, I stumbled upon the following text:
An OSPF area hides the topology from another area but allows for the
networks to be visible in other areas within the OSPF domain.
If a topology change occurs (link flap or additional…
Tarun
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about ibgp config and ping Time exceeded: Hop limit
I am configuring iBGP
Now there are two machines RS1 and RS2
They use Ubuntu 18 and bird 1.6
RS1 connected to as6939
RS2 connected to as20473
2000:1::/48 Announced on RS1
2000:2:: 48 Announced on RS2
RS1 and RS2 are connected through zerotier, and…
kagurazaka shira
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Loop thru the interfaces in the config file. If an interface is found that is not configured with authentication, then display result
it's a little bit hard to explain, but I want to write PowerShell script to search each interfaces that is configured in the set protocol ospf area statement to identify if any interface is not configured with authentication md5. if any interface…
CBLT
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Connecting eBGP and iBGP routers in Quagga
I am trying to announce a prefix from AS7 and I like AS6 receive it and send it to AS2(as shown in the attached topology). I have OSPF running on all routers of AS6. I have assigned 10.x.x.x for each loop back interface of my routers in AS6. for…
Shahrooz Pooryousef
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Python scapy OSPF
I have a requirement of testing OSPF v2 and OSPF v3 routing protocols against their respective RFCs. Scapy module for python seems interesting solution to craft OSPF packets, but are there any open source OSPF libraries over scapy that one could use…
vishal
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should i enable OSPF on core switch or on Edge switch?
is there any downside enable OSPF on a core switch ? we have remote office connecting back to the HQ , just wondering i should connect to branch with OSPF on a Edge switch or a Core switch
user1172579
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in ns2 ospf what does 'mt' mean in most code
In origin code in ospf in ns2, what does 'mt' mean? Does it mean any middle node in the path? Or means multi-topo, which means it contains all middle nodes.
eg: in ospf.cc
OspfPaths::iterator OspfPaths::insertPath(int destId, int mtid, int cost,…
Chason Song
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redistribute BGP routes in OSPF
Consider two routers A & B. Both of them run eBGP for connecting to ISP and also run OSPF inside the cloud. Both A&B also run iBGP and are connected in an internal iBGP mesh.
How suppose prefix P1 is received at both A & B (eBGP). They run the bgp…
Neel
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OSPF - Why only two-level hierarchy?
Why is OSPF limited to the one-backbone-multiple-areas-structure? (two-level structure)?
Why I'm asking? - In some cases, it would make sense to travel further down the hierarchical architecture to let's say 3rd or 4th level depending on AS or OSPF…
Lars Prehn
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Must any router belong to one area at last in OSPF
In OSPF v2，We can split the AS into areas. But in standard file rfc2328(http://www.potaroo.net/ietf/rfc/rfc2328.txt), it doesn't indicate whether every router must belong to area. I thought not, but in page29 of rfc2328, I can see this figure:
A…
闫伯元
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Implementing ospf topology collector
I need to implement a software module that is able to retrieve the topology of an autonomous system.
Looking at the various protocol that are implemented in Cisco routers i concluded that the only two alternatives to obtain topology are smnp and…
LuigiDB
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configuration OSPF in OpenBSD5.7
Yesterday i tried to enable OSPF routing on OpenBSD 5.7 . so i created "/etc/ospfd.conf" and added this codes to it ( just for test )
router-id 127.0.0.1
area 0.0.0.0 {
interface em0
}
but after type /etc/rc.d/ospfd -fd start i got this logs…
Reza
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Invalid command name "Agent/rtProto/OSPF"
I have installed the OSPF patch for ns2 and it installs correctly. Now when I try to run the tcl examples of the same patch with command ns ospf0.tcl it gives this error:
(TCL) Creating simulator & trace files...
(TCL) Setting up nodes and…
Raein Hashemi
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