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Multihomed WLANs from Intel
accessdeniednsp writes: "El Reg gives us some insight on Intel Labs' new software to let your wireless LAN card hop between various networks (802.3, 802.11, and 'fixed Ethernet' they call it). Perfect for us snoopers to walk by college frat houses and hopping on the 'net with our linux ipaq's :)" First company to come out with a "universal connectivity" PCMCIA card wins all the marbles.
I have trouble leaving my own home as it is. Please.
~
MU!
My question is, if they are doing this with software to switch between those protocols, what new and funky harware are we going to need?
It would be really cool if they could get an 802.11 to talk to bluetooth and others.
Where are we going, and why are we in this hand cart?
...network security are going to have to be even more "on their toes" about their wireless network.
I certainly think it's a good idea, though. I can imagine this kind of universal wireless compatibility preventing a lot of headaches for busy travelers when airports and mass transit terminals start implementing WLANs.
Now if I could only get my boss to let us put up an 802.11 network so I can code from Barnes & Noble down the street...
My sigs always suck.
You should have seen this on techtv...
... Intel's Wireless Gateway and will let PC users go from a hardwired connection to a wireless connection and back, seamlessly.
here is one mention of it...
Would be nice if I had some form of wireless network in the first place
Maybe I've been out of college for too long, but the highest level of connectivity I've observed at most frats was the build-in beer taps.
Every year during my review, I just pray the words "slashdot.org" aren't mentioned.
Reminded me of the IWarez history. Getting software will be easier, and while you walk with the dog.
Maybe a MS Office Lane, or Metallica Street?
Buy a Nintendo DS Lite
"notebook switched seamlessly between two wireless and one wireline Ethernet network without skipping a beat. "
My iBook does that all day. It's nothing to get excited about.
You just can't beat the Mac's ability to switch networks on the fly. Since windows can't switch network settings without a reboot, this is more of an OS issue.
--
the strongest word is still the word "free"
What we all really need is a wireless nic that can be upgraded to new wireless standards à la 802.11x via firmware. The argument exists that we don't have the components to build these cards but I feel that this is where research should move. As it stands now, we are poised for a new standard roll-out every 8 months for the next few years. Anyone know about this type of tech being develloped?
Do you want to remove linux?
how about if it's so nice out, why dont you enjoy it instead of squinting at a handheld?
making sure the shit isn't hitting the fan while you take in a peep show at the studio across street from B&N.
How the hell do you walk and surf the web at the same time? Those laptops must be pretty tough, b/c you'd all the time be running into things...
umm, there stereotypes are true in this case, and *most* frats should be proud of it.
;-)
that's my opinion though.
as far as the "white smoke running through air tubes..." I KNOW WHAT IT IS
Personally, I don't want any of the marbles. Keep stepping on the damn things late at night.
Best Slashdot Co
What happens when you walk accross the floor of your office and your DHCP server disapears?
Or maybe a better example would be your intranet mail server disapears because now you're hooked into the Starbucks network?
Is thought being dedicated to when the user wants to switch providers?
_Am
Call me crazy, but I don't remember most of the frats in my college being crazy about wireless ethernet. They were too busy drinking/partying/etc. I guess maybe if you're at MIT...
I don't understand why displays don't have their own power - I mean if it does take up 33% of the overall power, wouldn't it make more sense to have something detachable that I could swap batteries on rather than having to power down the entire system?
.. perhaps even visualize the networks you're attaching to a la the article on AR.
.. it's 2000 - so where's our rocket packs!? (go anywhere we strap them on our backs -DA)
And where's the affordable goggles? If display tech is the limiting factor in portable devices, why not just have attachable goggles to a small base that surfs wireless WANS
come on
The current model is that new features = new hardware.
Changing that model to new features = software download is substantially different, and a little scary for business.
If they offer a download, they would need to charge for it: software doesnt write itself.
With all the headaches associated with verifying
software releases across multiple hardware versions, I think it's cheaper and easier for everyone involved to just buy a new $100 hardware
when it comes out, rather than deal with the buggy firmware upgrades.
The Nokia D211 supports 802.11 and GSM/GPRS. I guess it's only lacking Bluetooth.
The basic idea is to set up a gateway on both the wired and wireless networks, and proxies ARPs on both networks, so that hosts on the different network see each other as if they were on the same LAN. This is a little like bridging--except that only a tiny bit of traffic (the ARP's) needs to "bridge" the two networks. The rest is taken care of by normal routing.
The trick is switching a host from wired to wireless without changing its IP addresses (so it doesn't drop any connections). Note this implies that the gateway's routing table has a host route (specifying the interface) to every address that is allowed to switch networks: you can't tell from the address which side its on, so the usual subnet mask routing won't work.
Pulling off the switch requires that the gateway be able to detect the switch, and then do two things: One, change its routing table, so that traffic for the address goes out on the right interface. Two, send "gratuitous ARPs" to other hosts, forcing them to update their ARP tables (since, if the host moved to the other network, traffic to it now needs to be routed through the gateway).
I think the most straightforward way to detect the switch is to have the gateway run a DHCP server, and have the mobile hosts renegotiate a lease when they switch networks. Then, add a hook to the DHCP server to do the magic whenever it notices a host renegotiate on a different network. For the mobile hosts to be identifyable across networks, they need to send the same client-identifier on both networks. Since the default client-identifier is usually the MAC address, this requires configuration on the clients (I edit /etc/dhclient.conf and pick one MAC address to use as
the client-identifier). Of course, the DHCP server needs to be configured
to give out the same address range on both interfaces.
Unfortunately, on the network I care about, my gateway is not the DHCP server. Instead, I run a DHCP relay. This mostly works--except the ISC DHCP relay doesn't have any hooks, and I haven't hacked it to add them. But it should be easy.
Another way to solve this might be for the gateway simply to monitor ARPs and do something when it notices a host switch networks. I haven't found a clean way to do this, and I think it might be less than perfect, because the host wouldn't get switched until it initiated an ARP transaction.
The last problem is that different systems seem to respond differently to gratuitous ARPs. For example, Linux systems don't seem to require them at all, because they (apparently) issue a new ARP pretty quickly after the old MAC address stops answering. But I can't get Solaris systems to listen to gratuitious ARPs at all, and they don't time out for minutes.
Also, gratuitiously ARPing the whole network is ugly. Ideally, we would would only send an ARP when we notice another host using a MAC that we know has moved to the other network. I have no idea how to do this.
Despite all the glitches, it's quite fun to switch to the wireless for mobility and back to the ethernet for speed, without losing my ssh connections. Improvements on this setup would be welcome!
The evaluation of an action as 'practical' . . . depends on what it is that one wishes to practice.
127.6.6.6 goatse.cx
...we can all apreciate that.
One word: Porn.
Now what?
maybe squinting at a handheld outside IS my way of enjoying the "outside"
Ave Molech Setting
A well-applied trollilian use of sed, my friend.
actually theres more informative articles out there on this - its just that they are trying to set up and utilize the "bunker" for the senate rather than use the current building because they were worried about attakc son our government.
Ave Molech Setting
My fraternity has a DRY house. Nor are we a bunch of backwards, beer-swilling, womanizing assholes. We do have fibre to the house and two ethernet ports per room plus some near tables, etc. No, the sterotypes do not apply, they rarely do.
802.3 is fixed ethernet, see this page.
bgphints - internet routing news, hints and ti
Intel's demo showed Skamania (cute name) hopping between 802.11, 802.3 and fixed Ethernet, ....
Skamania is the name of a county along Washington State's southern border with Oregon, by the Columbia River.
Intel has a facility nearby.
Hey, Windows users, there is no such thing as "forward" slash, there is only slash and backslash.
Skamania is a severly underdeveloped, ass-end redneck county in Washington. I think its the worst county. Is the name be a jab at microsoft, or at the entire Puget Sound area?
Why do I get the feeling that just as we get this problem solved, 100mbit wireless LAN will become available at reasonable prices?
--Blair
Sounds like a pretty boring frat.
that's n00b, newbie
You know. Autechre and Boards of Canada and all them lovely folks.
Easy does it!
This comment has been submitted already, 276865 hours , 59 minutes ago. No need to try again.
who gives a hoot about your firewall?
I can download patches for my SPARC,
I can download updates for my Cisco.
I can't (wouldn't want to) download
updates for my 2 yr old 802.11 NIC.
There's a big difference between a card
for a PC, and another piece of equipment.
Shoot, why not just get a Mac running OSX? I have been doing just this sort of thing for almost a year now with a Powerbook and now an iBook running OSX. The iBooks are really impressive small laptops that can be had for as little as $1100 and they give you a hell of a nice GUI and the option to X-windows or CLI in UNIX to your hearts content.
Visit Jonesblog and say hello.
yeah, sure, like I would pay to be dry, drugless, and use our campus connection. lol.
rent-a-friend? nah, rent-a-boring-dork.
Sehert said the CPU only accounted for seven per cent of the typical power consumption of a mobile device (although the chipset accounted for another 13 per cent). With the LCD sucking up a third of the power consumed
It seems to me that controlling power consumption requires a user eye-tracking mode. As I look at my dual screen setup, at every moment my focus rests only on a small couple of square cm of the screen. Surely with eye tracking it should be possible to dim/fade the rest of the screen, cutting down power consumption.
This might also have advantages for graphics cards/CPU, because you could concentrate on doing most your rendering and aliasing in only the portion of the screen within eye focus. For that to work you'd need some sort of tile-based rendering system though.
Da Blog
Uhh... I though you said you wern't in a fraternity? SO how would you know if we are proud of the stereotypes?
Shut the hell up!
(Oh, and its fraternity, not frat. We don't call your country a cunt, you don't call our fraternity a frat. Thanks).
Try this link instead, as it actually works. (The "Preview" button, and the left mouse button, are your friends.)
(BTW, the top-level 802.x page has links to a lot of information about 802.x standards, including a page of links to pages for the working groups for each 802.x standard (I'm amused to find that the 802 standards committee appears to be supersititious - they say 802.13 wasn't used), as well as a link to the Get IEEE 802(TM) page from which you can download, for free, PDFs for 802.x standards that were published 6 or more months ago.
Dear God.
I can only imagine what would happen for people using netstumbler:
"The airwaves! They're saturated! I've never seen so much pr0n!"
In all honesty, I've mentioned a number of times the advantage of wiring up the ol' fraternity house.
Since most of them are not geeks, their eyes get more glazed over than after a 6 kegger party. Simply stated, most fraternity members are not interested in being able to run SSH over an 802.11b WLAN.
Being able to score with the hotties in the sorrority next door, that's another thing entirely.
Go Deke!
Here's a news item at InfoSync about the new Nokia GSM, GPRS, HSCSD, and WiFi PCMCIA card.
Pretty freakin' cool. I want one.
-Russ
Me
this has already been done on the University of Western Ontario campus
Intel's demo showed Skamania (cute name) hopping between 802.11, 802.3 and fixed Ethernet...
it's not really a cute name...Skamania is the name of a county near Portland (Intel HQ)
They get all their names from locations here...Wilamette, Tualitin, etc...
BUT IT'S NOT CUTE!
No its a paralell government which can be handed power at any time , not just a bunker. They have people working around the clock at secret locations and most mayor departments have made legal preperations to hand over power to them . And the part about controling "civil unrest" is very disturbing since they can give law enforsment orders whithout disclosing who gave the order or even that the order was given.
well, the thing is, jus this past week, a buddy of mine and i had a laptop with the orinoco card, the home-built extended antenna and the appropriate access-point snooping software. we drove down the main street in one of the local college towns. just so happened to be driving by frat houses and local businesses when we found 30 open APs in a 2 mile stretch. we gracefully hopped onto a few and we were browsing internet sites at stop lights up and down the street ;) so yeah, frat houses have WLANs these days it seems...
no you're morons, you should have kept happy w/frat.
If you're not proud of the stereotypes, it just goes to prove my point furthur.
your comparison sucks. find a new one.
Hi! This is a test!hi!