Getting pretty close to default IPv4 route maximum for 6500/7600 routers.

Pete Lumbis alumbis at
Wed May 7 23:50:11 UTC 2014

ASR1k doesn't have fixed TCAM like the 6500 and has a little more wiggle
room, but it depends on the ESP you have installed. For example ESP 20
supports around 1,000,000 routes.


On Wed, May 7, 2014 at 6:45 PM, Shawn L <shawnl at> wrote:

> Do the ASR1k routers have this issue as well?  I searched around but
> couldn't find any information.
> ---------- Forwarded message ----------
> From: Irwin, Kevin <Kevin.Irwin at>
> Date: Wed, May 7, 2014 at 10:39 AM
> Subject: Re: Getting pretty close to default IPv4 route maximum for
> 6500/7600 routers.
> To: "nanog at" <nanog at>
> I¹m really surprised that most people have not hit this limit already,
> especially on the 9K¹s, as it seems Cisco has some fuzzy math when it
> comes to the 512K limit.
> Also make sure you have spare cards when you reload after changing the
> scaling, those old cards don¹t always like to come back.
> On 5/6/14, 7:01 PM, "Larry Sheldon" <LarrySheldon at> wrote:
> >On 5/6/2014 10:39 AM, Drew Weaver wrote:
> >
> >> Just something to think about before it becomes a story the community
> >> talks about for the next decade.
> >
> >Like we have for the last two?
> >
> >
> >--
> >Requiescas in pace o email           Two identifying characteristics
> >                                         of System Administrators:
> >Ex turpi causa non oritur actio      Infallibility, and the ability to
> >                                         learn from their mistakes.
> >                                           (Adapted from Stephen Pinker)
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