IGP choice

marcel.duregards at yahoo.fr marcel.duregards at yahoo.fr
Sun Oct 25 12:24:59 UTC 2015

Hi Matthew,

Thank a lot for your answer. This help me to understand, and make more 
sense to me :-).


On 23.10.2015 18:31, Matthew Petach wrote:
> 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

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