On Tuesday, May 28, 2013 05:41:11 PM Adam Thompson wrote:

> I do agree - in a large, heterogenous, complex-topology
> network, IS-IS proved to be a winner both for its
> reliability and the simplicity of configuration.

In many ways, I find it simpler than OSPF. But let's not 
start a war :-).

> I suspect one of the main reasons we don't see UNIX IS-IS
> implementations is the hard requirement for an ISO
> address.  There are ways of faking that, however, which
> is what I suspect Quagga does.

Implementation of HMAC IIH and LSP authentication in Quagga 
was also very poor. In a network where we ran Anycast DNS 
with the name servers, it was easier to run OSPF on the 
servers and carefully redisribute into IS-IS within the 
core.

> In a green-field implementation (or anywhere there's a
> clearly-defined border), RIPv2 is actually a very usable
> protocol.  Most people hear "RIP" and think of the old
> RIPv1 protocol, which had major issues, but RIPv2 is
> pretty clean and simple to deploy in production.  It's
> not a multi-protocol routing protocol, however, so in a
> complex network it might still not be suitable.  It does
> have some attributes of its legacy predecessor, but
> they're mostly ignorable on modern hardware.  Don't
> deploy it on 64kbps links, though...
> 
> Having said that, I'd still rather deploy RIPv2 than
> OSPF, given a choice.

I generally stay away from RIP.

Link state routing protocols tend to be a lot more superior 
in their fundamental design than their distance vector 
cousins.

Mark.

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