In order to support MTR,  we worked hard as well to design our ASIC in catalyst 
6500 family. ☺
That feature is very ASIC resource demanding and I think that was latest HW 
piece can do MTR forwarding.

Without ASIC that can support MTR in the industry now,  could Jafar share 
something with us why we need to
develop MTR routing?

My personal believe is that with the introduction of source based routing 
scheme recently (
such as segment routing),  MTR may be easier to be supported in the network 
end-to-end that way.

Thanks,

Andrew

From: Donald Sharp [mailto:[email protected]]
Sent: Sunday, December 20, 2015 6:34 AM
To: Daniel Walton
Cc: Jafar Al-Gharaibeh; Quagga Devel
Subject: [quagga-dev 14302] Re: Multi-Topology Routing in OSPF

It shipped and then got shelved because it was available on one platform and 
no-one was using it.

But yes I spent a large amount of time getting it to work under EIGRP :)

donald

On Sun, Dec 20, 2015 at 8:55 AM, Daniel Walton 
<[email protected]<mailto:[email protected]>> wrote:


On Fri, Dec 18, 2015 at 7:24 PM, Jafar Al-Gharaibeh 
<[email protected]<mailto:[email protected]>> wrote:
Hi Everyone,

    I have been looking into the ability to support multiple cost metrics per 
link for ospf, which is something that I brought up in our first Quagga monthly 
meeting. The "official" term for that is Multi-Topology (MT)  Routing in OSPF 
which is described in RFC  4915 (https://tools.ietf.org/html/rfc4915).

After some digging I found that this was actually brought up 6 years ago on 
this list:
https://lists.quagga.net/pipermail/quagga-dev/2009-July/006789.html

And It seems like there was a collective effort to get this up and running with 
progress on github here:
https://github.com/tomhenderson/quagga-mtr/

I see names like Paul, Vincent, Joakim among others who had contributed to this 
effort. I haven't checked to see how far did this go but it seems nobody has 
touched it in 5 years. Multi routing table support was not very common at the 
time in Linux kernels, and the same can be said about VRF which are things that 
could have hindered the move at the time but I'm not sure.

Can anyone tell me please about that project or any similar efforts?

Somewhat related...didn't cisco eventually abandon MTR?  I remember them 
dumping huge resources into this but if my memory is correct the whole project 
was cancelled (from googling it looks like it did ship though)

Daniel


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