[c-nsp] Hierarchical FIB on Cisco 7600

[Pete Lumbis]

for PIC Core
IP2IP hacks it using loadbalance adjacencies.
VPNv4 requires recirc.

PIC Edge is a different story since we are pre-installing the backup path
like FRR



On Fri, Apr 25, 2014 at 1:03 PM, Saku Ytti <saku at ytti.fi> wrote:

> On (2014-04-25 10:56 -0400), Pete Lumbis wrote:
>
> > The difference in commands is mainly in relation to software/memory. This
> > has the biggest impact on software based platforms like the 7200 but
> you'll
> > see an uptick in RP/SP memory usage by enabling, but only changes how
> > routes are built in hardware.
>
> How does it change how routes are built in HW?
>
> My understanding is that 7600 won't do indirection (load-info) in hardware
> TCAM regardless of your configuration.
> I don't think the hardware is really even capable of that, outside
> recirculation which I think is how MPLS FRR is implemented. But that'll
> mean
> you'll halve your PPS.
>
> --
>   ++ytti
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