largest OSPF core

Alex Ryu r.hyunseog at
Thu Sep 2 18:42:34 UTC 2010

I think it is really depending on how your network topology looks like.
If you have top-down design with star topology to limit the network
connections to individual routers, it may scale well.
But if you connect every routers to each other such as full-mesh, it
will be a problem during interface flapping or something like that.


On Thu, Sep 2, 2010 at 1:37 PM, Leo Bicknell <bicknell at> wrote:
> In a message written on Thu, Sep 02, 2010 at 03:20:05PM +0300, lorddoskias wrote:
>>  I'm just curious - what is the largest OSPF core (in terms of number
>> of routers) out there?
> I'll admit to having seen a network with over 400 devices in an
> OSPF area 0, didn't design it, and in the end didn't get to work
> on it.
> Far as I know worked just fine though, no issues reported.  How
> well your IGP scales depends a lot more on what you put in it, and
> how dynamic your network situation is than the protocol or number
> of devices.
> --
>       Leo Bicknell - bicknell at - CCIE 3440
>        PGP keys at

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