[ale] 3 days of 3+ hrs Comcast Outages!

[DJ-Pfulio]

Can´t speak for R-pi´s, but with USB3-to-GigE adapters, I´m seeing
920Mbps from two different chromebooks.  The rest of the network is GigE
with PRO/1000 NICs.  There are multiple $20-ish cheap switches involved,
but that part of the network is flat.

I did lots and lots of wifi work in a prior life.  Would be happy to
share what I know at a Sunday meetup.  Basically, I avoid wifi unless
absolutely necessary.

The wired r-pi-v2 is on the same GigE network. Never thought to do any
iperfs ... let me see how hard that is. Easy.

~$ iperf -c hadar
------------------------------------------------------------
Client connecting to hadar, TCP port 5001
TCP window size: 43.8 KByte (default)
------------------------------------------------------------
[  3] local 172.22.22.28 port 43586 connected with 172.22.22.6 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec   112 MBytes  94.2 Mbits/sec

and

$ sudo lshw -C network
  *-network
       description: Ethernet interface
       physical id: 2
       logical name: eth0
       serial: b8:27:xx:xx:xx:xx
       size: 100Mbit/s
       capacity: 100Mbit/s
       capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt
100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=smsc95xx
driverversion=22-Aug-2005 duplex=full firmware=smsc95xx USB 2.0 Ethernet
ip=172.22.22.28 link=yes multicast=yes port=MII speed=100Mbit/s

which explains the sub-100Mbps. With USB2, the theoretical max is
400Mbps, but I´d be shocked if the chips allowed over 200Mbps.  I have
an SSD via USB3 which could be tested ... but it is encrypted, uses LVM
and would be a hassle to install all that onto a R-pi (I suspect).


On 06/05/2016 01:33 PM, Chris Fowler wrote:
> 
> 
> How much can you push through that USB attached ethernet?  That is my
> concern at a speed such as 250Mbps.
> 
> I've been testing a few USB 3.0 Gib adapters.  I'm seeing about 120Mbps
> via iperf.  For my application on my device that is more than enough.
>