Looking for information on IGP choices in dual-stack networks

Matthew Petach mpetach at netflight.com
Thu Jun 11 01:39:36 UTC 2015


We use IS-IS dual-stack in the core,
and OSPFv2+OSPFv3 in the datacenters.
Roughly 100 routers in the IS-IS core, and
less than 2000 routers in the OSPFv2+OSPFv3
datacenters.

Matt


On Tue, Jun 9, 2015 at 5:59 PM, Victor Kuarsingh <victor at jvknet.com> wrote:
>
> I/we (Philip and I) attempted to keep the question as generic as possible,
> allowing folks to state the IGPs they use, in whichever combination or in
> some cases (as we can see), more complex deployments.
>
> I would agree with statements form Joel earlier with respect to cases where
> early vendor support may have influenced some network zones (inside a given
> AS) to support a different IGP (his case of OSPFv3 for devices which lacked
> IS-IS support is one I did face a few years back as well in the DC with
> respect to Load balancing  and Firewall devices).
>
> The merger one was a new one for me, but it seems to reflect some peoples
> reality.
>
>
> regards,
>
> Victor K
>
>
>
>
> On 2015-06-09 7:41 PM, Joe Abley wrote:
>>
>> Hi Randy,
>>
>> On Jun 9, 2015, at 18:08, Randy Bush <randy at psg.com> wrote:
>>
>>>> Routers makes more sense to me than networks (IGP, so one network,
>>>> right?)
>>>
>>> so you are thinking of a network where half the routers run is-is one
>>> quarter ospf/ospfv2 and one quarter ospf/ripv3.  right.
>>
>> No, not at all. I thought Victor was asking "what IGP" and "how many
>> routers use it in your network". I assumed he was interested in
>> whether the size of the network influenced the IGP choice.
>>
>> Perhaps I misunderstood, because apparently I was the only one who
>> read it that way.
>>
>>
>> Joe
>
>



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