[c-nsp] ASR9900 - Copy files from USB key

[James Bensley]

> > On May 20, 2019, at 11:03 PM, Erik Sundberg <ESundberg at nitelusa.com> wrote:
> >
> > Little follow up.
> >
> > On a ASR9906 6.3.3 (32bit) the usb key comes up as usb: but on 6.3.3 (64-bit) it's disk2:
> >
> >
> > Copying the 6.3.3 migration files from a USB Key was 182 seconds, with HTTP it was around 1 hour. (1.3 G File)
> > Doing a install add source 6.5.3 64-bit from a USB Key was 15 minutes and using http was an 1 1/2 hours.  (1.5 G File)
> >
> > So sourcing files from a USB key are 4x times... Which is to be expected.
> >
> > The bandwidth to the HTTP server is 100M and <30msec latency, but the circuit was never maxed. For some reason coping from a HTTP server is just super slow…
> >
>
> Do you have selective-ack enabled?
>
> Try these and see if your TCP is better:
>
> tcp selective-ack
> tcp window-size 65535
>
> We had issues with this in the past at my prior employer and these options solved much of it.  I’m trying to recall if we ever got the window scaling stuff fixed
but I forget.  I think their TCP stack didn’t do window scaling if you
tcpdump it.  It might be different in eXR.


On cXR I had a similar experainces to Erik, copying via a network
protocol was very slow (circa 1-2 hours) but copying via USB was
significantly faster (just minutes).

I recently upgraded from eXR 6.5.2 to 6.5.3 and pushed the files using
SCP to the router from a jump box, which was on the same LAN as the
management interface on the RSP. It was copying at 100Mbps (the speed
of the OOB switch) so I think in eXR these issues are more or less
fixed.

Cheers,
James.