Re: [OSPF] draft-kini-ospf-fast-notification-01

[Curtis Villamizar <[e-mail]>]

In message <BANLkTinCQ=[e-mail]>
Vishwas Manral writes:
>  
> On Mon, Apr 4, 2011 at 1:33 PM, Curtis Villamizar <[e-mail]> wrote:
> Hi Curtis,
>  
> > Has anyone measured the per hop flooding delay that is incurred in
> > modern routers?
>  
> From the few we have worked, it works from 10's of nanoseconds to
> microseconds.
>  
> You may see some work on
> http://tools.ietf.org/html/draft-manral-ospf-te-delay-00. We need to
> actually add per device delay to make the solution generic, which is
> what we are trying to work on.
>  
> Thanks,
> Vishwas


I'm not talking about forwarding latency, but IGP flooding latency.
In flooding you are not supposed to reflood something back to an LSR
that already knows about it so a CPU is involved unless someone has
put the flooding into an FPGA (these days who knows).

Curtis