nanog mailing list archives

Re: OSPF vs ISIS - Which do you prefer & why?


From: Tim Jackson <jackson.tim () gmail com>
Date: Thu, 10 Nov 2016 19:01:39 -0600

So what about commercial implementations?

--
Tim

On Thu, Nov 10, 2016 at 6:54 PM, Josh Reynolds <josh () kyneticwifi com> wrote:

Oops, forgot link. Cooking dinner :)

http://www.nongnu.org/quagga/

On Nov 10, 2016 6:53 PM, "Josh Reynolds" <josh () kyneticwifi com> wrote:

Here's a start!

"Support for OSPFv3 and IS-IS is various beta states currently; IS-IS for
IPv4 is believed to be usable while OSPFv3 and IS-IS for IPv6 have known
issues."

On Nov 10, 2016 6:50 PM, "Tim Jackson" <jackson.tim () gmail com> wrote:

Maybe you didn't look hard enough?

ISIS feature support in a bunch of different products has sucked for a
long time vs OSPF, but that's a pretty well known and accepted fact.
Generally these features are the same across multiple products from the
same vendor (usually across the same OS anyway)...

Just name 1 feature that was in Cisco and wasn't in other
implementations........... Just one.. Something.. Does ISIS on IOS make and
hand out ice cream on Fridays? I want to know if I'm missing out..

--
Tim

On Thu, Nov 10, 2016 at 6:33 PM, Josh Reynolds <josh () kyneticwifi com>
wrote:

My first post said the following:

"Vendor support for IS-IS is quite limited - many options for OSPF."

On Nov 10, 2016 6:24 PM, "Charles van Niman" <charles () phukish com>
wrote:

Your original point was that a list of vendors "didn't get IS-IS" but
provided no details about what you are talking about. As far as all
the documentation I have read, and some of the documentation you
linked to, it works just fine on quite a few vendors, and a few people
on this list. Your original point mentions nothing about wider OSPF
adoption, which you seem to have shifted to to deflect having to
provide any actual details.

Are we to assume that your original point was incorrect? As far as the
landscape as a whole, I have seen quite a few networks that get by
with either protocol just fine, the use-case for a given network is
not such a broad landscape, so I think "use the right tool for the
job" seems very apt, and that you can't just say that only two
protocols are suitable for all jobs.

/Charles

On Thu, Nov 10, 2016 at 6:00 PM, Josh Reynolds <josh () kyneticwifi com>
wrote:
As cute as your impotent white knighting of one vendor is (I very
much
like
Juniper BTW), you're absolutely ignoring my original premise and
point
because you got your panties in a wad over a potential triviality
of an
internet comment - where documentation exists, should one take the
time
to
go through it, to find discrepancies between them.

So, if you'd like to prove your point and earn brownie points with
$vendor,
on a feature by feature basis please take the time to consult
documentation
of two vendors products (you can even pick the platform and
subversion
release!) to refute my claim. This has nothing at all to do with the
point
of my statement mind you, it's simply a sidetrack that has wasted
enough
time already.

That said, glance across the landscape as a whole of all of the
routing
platforms out there. Hardware AND softwsre. Which ones support bare
bones
IS-IS? Which ones have a decent subset of extensions? Are they
comparable
or compatible with others? The end result is a *very mixed bag*,
with far
more not supporting IS-IS at all, or only supporting the bare
minimum to
even go by that name in a datasheet.

Thus, my point stands. If you want as much flexibility in your
environment
as you can have, you want OSPF or BGP as your IGP.

On Nov 10, 2016 5:33 PM, "Nick Hilliard" <nick () foobar org> wrote:

Josh Reynolds wrote:
I didn't "trash talk" a vendor. If I did, it would be a
multi-thousand
line hate fueled rant with examples and enough colorful language
to
make
submarine crews blush.

I have no doubt it would be the best rant.  It would be a beautiful
rant.

Entertaining and all as hand-waving may be, please let us know if
you
manage to unearth any actual facts to support the claims that you
made
about junos's alleged feature deficits.

Nick








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