Battling OSPF

I went along with a video from TrainSignal about OSPF. From the instructors in the training videos as well as Lammle(which is my main read right now), OSPF is the main IGP that networkers use.

To me, it feels like glorified RIPv2, which is a lot of redundancy and typing of the same thing. But I guess if you generalize the networks(summarize them for a lack of a better term) things get easier. Personally, I'm a huge fan of EIGRP and Ross of TrainSignal says that it might be open to other vendors soon...

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Comments

DoubleNNs

I don't see how you can compare OSPF to RIPv2 but still differentiate them both from EIGRP.

shodown

how so when RIP "route by rumor" IE not really knowing whats out there just what its told, where with OSPF each node builds its own path?

FloOz

The only distance vector characteristic that you could remotely compare to OSPF is that of the summary LSAs it receives from ABRs. You could kind of look at it as the local router doesn't know exactly what's behind the ABR.

networker050184

If you only look at what you type into the terminal, then yeah not much difference between any of the IGPs. What goes on under the hood is completely different between RIP and OSPF or even EIGRP.

MrXpert

MrPuzzlez wrote: »

I went along with a video from TrainSignal about OSPF. From the instructors in the training videos as well as Lammle(which is my main read right now), OSPF is the main IGP that networkers use. To me, it feels like glorified RIPv2, which is a lot of redundancy and typing of the same thing. But I guess if you generalize the networks(summarize them for a lack of a better term) things get easier. Personally, I'm a huge fan of EIGRP and Ross of TrainSignal says that it might be open to other vendors soon...

RIP uses hop count as its metric as is a small network solution. 16 hop limit. It is limited and slow to converge unless you tweak it using triggered updates and configure it to unicast to save on bandwidth.

OSPF is faster than RIPv2. Its a link state protocol, uses areas, virtual links, filter-lists as well as NSSA, stub, totally stubby areas for reducing the size of routing tables. When you look at the LSAs and the way it forms peerings then you will see that OSPF has a lot more in common than EIGRP than it does RIP.

I've never thought of OSPF being a "glorified" RIPv2 before. By glorified do you mean, it does the same as RIP but does it a very ornate and ostentatious way? Normally when I configure an IGP...for example when configuring reachability within iBGP I normally use OSPF or EIGRP because of their speed and flexibility. I think i'd only use RIP if I had a small network.

mikeybinec

EIGRP is proprietary for Cisco. OSPF is IEEE and can connect to no cisco routers

tomtom1

Well, actually Cisco is beginning to open up EIGRP too.

MrXpert

From what I have heard the EIGRP version being released to multi vendor platforms will be a basic version of it with many advanced features missing from it.

More info here https://tools.ietf.org/html/draft-savage-eigrp-00