[c-nsp] Cisco Router IRB

[Arie Vayner]

That's my recollection as well... IRB should be cef enabled on G2

On Mon, Mar 5, 2018, 01:46 James Bensley <jwbensley at gmail.com> wrote:

> On 5 March 2018 at 08:42, Mikael Abrahamsson <swmike at swm.pp.se> wrote:
> > On Mon, 5 Mar 2018, Arie Vayner wrote:
> >
> >> My gut feeling tells me the performance will be the same for irb and
> >> regular routing. These are software routers, so the performance depends
> on
> >> how many and which features you enable.
> >
> >
> > There is a huge performance difference (at least in older routers and
> older
> > software) between CEF-enabled forwarding paths and non-CEF-enabled
> > forwarding paths, even on CPU based routers.
> >
> > Look for routerperformance.pdf and compare "process switching" and
> "fast/CEF
> > switching". There is often 5-20x difference in pps. So at least back
> then it
> > was important to use features that were CEF enabled, otherwise
> performance
> > would go down a lot.
>
> I thought that IRB did use CEF on the ISR-G2s?
>
> Cheers,
> James.
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