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IGP choice

On Fri, Oct 23, 2015 at 1:41 AM, marcel.duregards at yahoo.fr
<marcel.duregards at yahoo.fr> wrote:
> sorry for that, but the only one I've heard about switching his core IGP is
> Yahoo. I've no precision, and it's really interest me.
> I know that there had OSPF in the DC area, and ISIS in the core, and decide
> to switch the core from ISIS to OSPF.

Wait, what?
*checks memory*
*checks routers*

Nope.  Definitely went the other way; OSPF -> IS-IS in the core.

> Why spend so much time/risk to switch from ISIS to OSPF, _in the core_ a not
> so minor impact/task ?
> So I could guess it's for maintain only one IGP and have standardized
> config. But why OSPF against ISIS ? What could be the drivers? People skills
> (more people know OSPF than ISIS) --> operational reason ?

I'm sorry you received the wrong information,
the migration was from OSPF to IS-IS, not
the other way around.

Thanks!

Matt