Questions tagged [ospf]
For questions about OSPF. Open Shortest Path First (OSPF) is a link-state routing protocol for Internet Protocol (IP) networks.
451 questions
0 votes
2 answers
139 views
Inter Router Communication
I'm doing some background reading on OSPF and EIGRP and Inter Router Communication. This may sound silly but just wanted a wider perspective. From a routing perspective, all hops would be considered '...
- 115
5 votes
5 answers
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How can routing protocols such as OSPF and RIP use the network layer
I am currently reading the the network layer chapter in Kurose & Ross Computer Networking: a top down approach. I understand that one of the responsibilities (services) of the network layer is to ...
1 vote
2 answers
208 views
Looped Routing Scenario
Scenario 1 Let's say router A needs to send a packet to the destination 192.168.23.2 (router B in the B-C subnet) It routes the packet through C (at a cost of 10, next hop being 192.168.13.1), even ...
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0 votes
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OSPF Stub Networks and Loopback Interfaces
I have a question about Stub Networks in RouterLSA in OSPF for Loopback interfaces. In RFC we can read: "If the state of the interface is Loopback, add a Type 3 link (stub network) as long as ...
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2 votes
1 answer
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OSPF - is the Designated Router the same thing as the Master Router?
Is it possible, to have a DR as a Slave Router? So here is my knowledge: The DR and the BDR are elected based on priority and then highest RID in an area, so every router can communicate with the DR ...
- 131
0 votes
1 answer
145 views
OSFP anycast route different area
So.. lets pretend i need to advertise a route in anycast to the backbone, obviusly same route that in this case is 192.168.1.111 . Can be a problem if the routers that advertise that route to the ...
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0 votes
1 answer
153 views
CCNA OSPF Loopback as the router ID
FYI, I am studying for the CCNA and new to this. The scenerio, 2 routers R1 and R2. R1 Loopback IP as 192.168.0.1 R2 Loopback IP as 192.168.0.2 Using the loopback IP's as the router ID. I provisioned ...
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0 votes
2 answers
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How does OSPF sense the physical media?
For different physical media types, OSPF behaves differently about electing a Designated Router or not. For example, non-multiaccess media links such as serial Point to Point do not need election for ...
