[c-nsp] Stable version for 2821 - 151-4.M3 or 151-4.M1?

[Lukas Tribus]

> Hello,
>
> Is 15.1(4)M3 a stable one against 15.1(4)M1 for 2821 ?

I recommend using the latest rebuild of the respective branch,
in this case 15.1(4)M9, but there are no guarantees that it works
fine in your particular configuration.

Double check RAM and flash requirements if you install this image on
a ISR G1.



Regards,

Lukas