the port we're trying to DWDM long-haul transmissions and we're
getting closer and closer to the shannon limit and we're throwing lots of
DSP at the problem (the new DSPs are 7nm and they already have 5nm and 3nm
roadmaps for these DSPs to keep power down).
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flows?
That's extremely relevant, and I'd definitely like to simulate several UDP
50pps sessions with different DSCP values and see if there is any
difference between them, and indeed if bleaching etc is going on.
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x27;t close the test nicely.
I also considered using WebRTC or VoIP libraries, does anyone know what
RTT/PDV/packet loss data can be extracted from some common ones?
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/* !fw3 */
But you might be right that in places with a lot more clients then this
might indeed cause problems.
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that might have a chance to be deployed internet-wide.
01 seems as good as any.
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o say?
Generally people in the IETF are acting as individuals, not
representatives of a company. If you put in "INTERNET!!!" as affiliation
I'm pretty sure nobody would care.
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Cerowr
yone here?) coming to netdevconf?
I am not.
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code
from the 90ties (I doubt it's been touched much).
If you need full Internet BGP tables then it needs to have 1GB of RAM.
I have close to 20 year experience with these kinds of boxes, so I can
help you before you buy.
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al bw, and even if that had a 1 second FIFO
with tail drop.
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#x27;t backoff and try
to avoid causing congestion. So your previous email about allowing some
congestion to take place on LE would be good as then protocols that try to
avoid causing congestion would have a way to do so.
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% of the rest of the capacity and give 5% to the
software download. LE marking the software download traffic can do that.
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me their wifi problems I can try to
replicate it with that hw...
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table for me with 18.06.1.
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don't use the wifi, I
have Ubiquiti for that). However it does CAKE on my 250/100 Internet
connection with CPU cycles to spare.
Otherwise I hear a lot about the TP-LINK Archer C7 as some kind of
"reference stable OpenWrt platform".
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On Wed, 5 Dec 2018, Toke Høiland-Jørgensen wrote:
Mikael Abrahamsson writes:
On Tue, 4 Dec 2018, Dave Taht wrote:
I expect dave reed to comment, so I'll withhold mine for now
https://kurti.sh/pubs/dLTE-Johnson-HotNets-2018.pdf
When I read the first page I was hopeful, then unfortun
y
get it. The more seamless the better. In that aspect this proposal is kind
of neat in that I could make my residential radios join a larger network
(similar to eduroam).
So yes, I think this proposal has some merit.
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own, but they expect their ISP to manage and software update.
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unencrypted and
extractable without password from the device, compared to them being lost
because the device was damanged otherwise broken.
So we need to come up with a security regime that makes sense for the most
amount of people, and then try to still cater to the ones who want to do
the EU picking
something like this up first though. ATM I do not see much appetite for
such regulatory actions in the US.
Agreed.
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d need
at least US or EU size market to really succeed with this.
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On Wed, 24 Oct 2018, Dave Taht wrote:
Right, a device that speaks homenet should not request PD.
But I need that to get from my ISP.
Right, it should request PD from the ISP (homenet external port) but it
should not request PD from homenet internal ports.
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P's.
Configuring static ULA addresses might be a way to handle it. Doesn't help
reaching them from the outside though. We need DNS or other mechanism to
keep track of addresses as they change over time.
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from provider and it hasn't
changed yet.
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that carry this kind
of information within the protocol, and it does leak.
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On Fri, 19 Oct 2018, David Lang wrote:
On Fri, 19 Oct 2018, Mikael Abrahamsson wrote:
Most host stacks do not handle 240/4 correctly. Getting this working
outside of a very closed and controlled network is not feasible.
You would need to validate all devices to support this 240/4 block that
not feasible.
You would need to validate all devices to support this 240/4 block that
most IP stacks today will not use.
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https
e cares about operational availability of the service.
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On Wed, 3 Oct 2018, Mikael Abrahamsson wrote:
On Wed, 3 Oct 2018, Dave Taht wrote:
I *think*, but am not sure, this box could do a lot more prior to
this, but I never really tried. I'm off mostly debugging a babel
problem at the moment,
I know for a fact that this box (WRT1200AC
trol the source address selection of hosts. I had two different
upstreams with PDs and one had much longer lifetime compared to the
other. So hosts chose the one with the highest lifetime, which wasn't what
I wanted.
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efore. I tested it a lot back then. Right now, I am
using it as a 250/100 megabit/s machine, and it seems to spend a lot CPU
doing that.
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18.06.1 compared to whatever was
in in 17.01.x, I'd say factor 3-4 worse.
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then you get no IPv6. So either your packets aren't making it to
the Comcast upstream router, or it doesn't do any of the basics.
I thought this would be a PD problem or something, but this is more basic
than that.
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announced out on LAN. I even configured bidirectional SQM
with CAKE on each uplink (250/50 and 250/100 respectively) and it seems to
do the right thing.
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Cer
erience with these devices is the Edgerouter 3/5/X, and they
have very low performance if you disable offloads (which you need to do to
enable AQM) and run everything in CPU, around 100 megabit/s of
uni-directional traffic.
Do they have other platforms where this would actually matter?
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celerators so the
kernel never sees the packets after initial flow setup.
So you need to get the people developing that silicon to get with the
program.
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so it's now in a box again.
It seems like good hw though. I like Marvell SoC.
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which is a major driver for the lack of up-to-date kernels
in HGWs and other IoT devices).
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losed doors and code is thrown over the fence.
To me it's amazing that Linux kernel has gotten as far as it has, and
actually has a so-so working community around it, with lots of companies
funding work going in there. Things could be a lot worse.
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o money to continously develop the device.
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eds
requirement.
So I think the conclusion basically is: 10GE and up is hard. There are
real physical limitations here. I would be very happy if we could prove
Shannon wrong. :P
https://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem
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r/size compromise, the
cables can be made extremely thin. Still wondering how the connectors etc
are going to look like to make this end user friendly.
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tios-thunder3-10g-adapter-now-available
300USD is still a significant chunk of money compared to the 29USD
1GBASE-T thunderbolt2 adapter that Apple sells.
But still, with these kinds of products, there might be hope!
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my ISP?
This is interesting. I thought about this for several minutes, but can't
come up with an explanation to this behaviour, at least not from the
typical kind of DDOS that's going around. If there was some kind of ddos
mitigration equipment
d" to run longer hops (if one wants any kind of
high bitrate).
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25-70% utilization of
your links (for the normal case, because you need spare capacity to handle
events that increase traffic temporarily, plus handle loss of capacity in
case of a link fault). The upgrade might be to add another link, or a
higher tier speed interface, bringing down
sure your network is never full for any
sustained amount of time, in normal operation, and make sure you perform
upgrades well before the growth has resulted in network being full.
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g to fix the problem if I
don't have enough throughput available to me that I need for my
application.
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ports).
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cable so instead you need lots of power and DSPs to figure out what's
going on.
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jumps up a lot, and I get fans. The NICs aren't widely available, even
though they're not the biggest problem. My in-house cabling can do 10GE,
but I guess I'm an outlier.
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don't want
to pay 2x my current MRC to get 1000/100. However, if I had to downgrade
to 30 megabit/s I would most certinaly notice it, and in my market that
would just be a 20-30% saving which definitely isn't worth it.
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isn't only for "smart meters" etc, it's for everything.
We've created devices that are impossible to verify without destroying
them (sanding down ICs and looking at billions of gates), and in order to
verify them, you need equipment and sk
ith the shipped OS won't do more than around 100
megabit/s if the traffic isn't hardware accelerated. But I am not familiar
with the ER-X, so if they're better CPU forwarders then that's
interesting!
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never seen by the host CPU in normal
operation.
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difference.
(I have 250/50 on my DOCSIS3.0 connection, but perhaps it's common
knowledge what speeds Comcast customers typically has, that I don't know?)
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problem with CAT6A.
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w anything about this packet processor and FOSS support for it? I
guess the "buffer manager" is very much of interest to anti-bufferbloat...
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rs have no insight into what and how
much traffic is going where.
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and BBR4 just kills both CUBIC
flows. Same with PIE.
So it seems my intuition was wrong, at least for these scenarios. It
wasn't CUBIC that would kill BBR, it's the other way around. Great to have
testing tools! Thanks Flent!
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might very well
be completely off, but I think it'd be interesting to know.
I'll take a look at your flent data, thanks for posting them!
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ns, what's the ratio between BBR
and CUBIC after 20 seconds of letting things settle down to new
equilibrium?
Consider the FIFO buffer practically infinite, or at least able to buffer
5 seconds of packets without drop. It's an interface with a single,
stupid, huge FIFO buffer.
-
ow do these interact?
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usion by looking at when the traffic occurs and what the traffic
levels are, and from remembering what was done at the time.
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flexible as possible? Lots of startups and established vendors are
pitching these solutions to the ISPs, most of them with their own
proprietary extensions and non-interworking protocols. What's the open and
flexible alternative?
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At least this has been shown by previous generation of datacenter switches
that had miniscule buffers and ISPs tried to use them and when there were
microbursts there was uncontrolled packet loss.
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cheap.
This is most definitely not why they're doing it. Buffer memory for them
is EXTREMELY EXPENSIVE.
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an the USB ethernet that the RPi has.
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On Mon, 11 Jan 2016, Dave Taht wrote:
I am happy to see the omnia crack nearly 750k of funding thus far.
Seems they ended up with 859k now with the campaign ended, but it seems
it's still orderable, and without wifi it seems to be the same price
($139).
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otup check to be able to put non-sanctioned cards
into the laptop.
Vendors tend to blame for instance FCC for the "sanctioned card"-lock,
but...
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ecture and got back the speed...
I believe it's this one I was mucking around with:
https://dev.openwrt.org/ticket/19420
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went in 5 hours, perhaps
that's what you're referring to?
They were at 98% of the 100kUSD goal at 0630 CET, and now at 8:45 CET,
they're at 101%. I believe they launched around noon yesterday, CET.
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On Wed, 11 Nov 2015, Dave Taht wrote:
http://solid-run.com/marvell-armada-family/clearfog/clearfog-specifications/
Armada 385 is still my favorite.
Turris Omnia looks promising:
http://www.netnod.se/sites/default/files/turris-omnia-netnod-MS-20151014.pdf
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their gateways.
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eems only to be of a concern on
the DFS channels around a limited number of airports.
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On Tue, 8 Sep 2015, Dave Taht wrote:
On Tue, Sep 8, 2015 at 1:22 AM, Mikael Abrahamsson wrote:
On Tue, 8 Sep 2015, Dave Taht wrote:
wifi, and the carriers... which bugs me. 5.x ghz is the people's
spectrum, that we should be free to use any way we want... and to make
Please note tha
make wifi worse?
And 802.11 isn't really open either, and the unlicensed spectrum still
requires that devices are approved to be operated there, right, so if FCC
and the likes do their job properly then these technologies should
work together at least on the RF level?
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S, but it might just be whatever IPQ8064 offers as standard
(since the packet forwarding hardware is controlled by proprietary
firmware and proprietary kernel modifications to interact with this
firmware).
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On Wed, 19 Aug 2015, Isaac Konikoff wrote:
Yep, planning to do just that...but already the marketing has got me
shaking my head... "AC1900 for Wi-Fi speeds up to 1900Mbps"
"everybody does it"
http://www.cnet.com/topics/networking/best-networking-devices/802-11ac/
-
without getting Qualcomm onboard and
working closely with the project.
If I understand correctly, we have both the packet accelerator (closed
source) and the ATH10K wireless (closed source) to contend with.
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resource to attain that speed, that person will never know they're hogging
resources and will never try to improve the situation.
So if I understood you correctly above, my opinion is in agreement with
what you wrote.
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of scheme where different flows are put in
different queues.
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oing to be a USD200 device once it's done.
What is the SIM card used for? To put a mini-PCIE WWAN card on there?
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widely deployed for
Internet use, and there should be no strict priority but just a slight
preference for scheduling packets with the BE+ code point, exactly to make
DDOS less of an impact.
What is your opinion on this concept?
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ings started working properly.
"sysupgrade -n " does this as well, but I am not sure the
Linksys configuration data is stored in the same place so that might or
might not help.
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annot compute suffix of object files: cannot compile
See `config.log' for more details.
mikael - which toolchain are you using?
Hm, what do you mean by toolchain? I am compiling on an Ubuntu 14.04
machine.
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On Tue, 7 Jul 2015, Joe Touch wrote:
Some questions:
On 7/6/2015 11:16 PM, Mikael Abrahamsson wrote:
...
You can flash back the factory firmware without serial, you just use
sysupgrade with the Linksys factory image.
How does that differ from mtd, e.g., as indicated here (which doesn&#
in a car, it's
not that hard, but if you don't know how to do it, you need to study first
and find correct tools in order to do it. Also, if you get it wrong you
might damage things.
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ccelerator, but instead has a much better CPU for forwarding packets.
So basically if you buy a v1 you'll get a third or so in forwarding
performance over the v2 with OpenWrt. With the Linksys firmware I could
imagine the v1 is faster than the v2. The v1 has a fan, v2 does not.
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On Thu, 2 Jul 2015, Mikael Abrahamsson wrote:
for the sake of spreading this caveat, it does seem like the open source
driver for wifi in the WRT1200AC isn't in very good shape. It works, but
it's very slow, speeds vary depending on what kind of client I connect
with, and the
with more "everything", apart
from RAM that (for some reason) the WRT1200AC has 512MB RAM but according
to http://wiki.openwrt.org/toh/linksys/wrt1900ac the WRT1900ACv2 only has
256MB RAM.
I don't have any information on the performance of the radio in the
WRT1900ACv2.
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7;t have to add them later.
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y're aware of the problem.
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the only way to generate congestion egress on the WAN SOC port is to
add traffic locally from the SoC (iperf3 for instance), or adding traffic
from Wifi.
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gress) by running traffic
LAN<->WAN alone.
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you need to go into the luci sqm scripts
and set queueing algorithm etc.
some good commands to see what's going on:
tc -d qdisc
tc -s qdisc
Hope it helps.
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Mikael Abrahamssonemail: swm...@swm.pp.se
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On Tue, 30 Jun 2015, Mikael Abrahamsson wrote:
On Mon, 29 Jun 2015, Dave Taht wrote:
attached is a patch for that, put it in your
feeds/cero/kmod_sched_cake/patches
directory, rebuild (make package/kmod-sched-cake/{clean,compile,install})
I compiled openwrt trunk with linux kernel v4.0 and
ttp://swm.pp.se/aqm/rrul_150630-cake-l4.0-1.tar>.
As far as I can tell sirq load is higher rather than lower so it doesn't
seem like kernel 4.0 has any significant performance benefits, rather the
opposite.
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Mikael Abrahamssonemail: swm..
On Mon, 29 Jun 2015, Dave Taht wrote:
attached is a patch for that, put it in your feeds/cero/kmod_sched_cake/patches
directory, rebuild (make package/kmod-sched-cake/{clean,compile,install})
Test results: http://swm.pp.se/aqm/rrul_150629-cake-11.tar
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Mikael Abrahamssonemail: swm
shaped.
Then I removed the ll adaptation and changed to simplest.qos and ran
another test with cake:
http://swm.pp.se/aqm/rrul_150629-cake-10.tar
Now I'm going to try out if my new version with your cake patch will boot
and work.
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Mikael Abrahamssonemail: swm...@swm.
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