Re: Big Temporary Networks

2012-09-24 Thread JÁKÓ András
just a small comment: As far as I understand AP isolation doesn't work if you don't have a WLAN controller but do have more than one APs. E.g. in the following setup ap1--sw1--sw2--ap2 with AP isolation turned on, clients associated to ap1 cannot communicate directly with other

Re: Big Temporary Networks

2012-09-23 Thread JÁKÓ András
Second, in the hotspot scenarios where this is likely to be a problem (in IPv4 -or- IPv6) it's addressed by the AP isolation feature that's getting close to omnipresent even in the low end APs. With this feature enabled, stations are not allowed to talk to each other over the wlan; they can

Re: Big Temporary Networks

2012-09-23 Thread William Herrin
On Sun, Sep 23, 2012 at 3:50 PM, JÁKÓ András jako.and...@eik.bme.hu wrote: Second, in the hotspot scenarios where this is likely to be a problem (in IPv4 -or- IPv6) it's addressed by the AP isolation feature that's getting close to omnipresent even in the low end APs. With this feature

Re: Big Temporary Networks

2012-09-22 Thread William Herrin
On Fri, Sep 21, 2012 at 10:42 PM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: William Herrin wrote: that's getting close to omnipresent even in the low end APs. With this feature enabled, stations are not allowed to talk to each other over the wlan; they can only talk to hosts on the

Re: Big Temporary Networks

2012-09-22 Thread Masataka Ohta
William Herrin wrote: You are saying to disable DAD, which is a violation of SLAAC. We do that on some wired ethernets too. You are calling such a link Ethernet. OK. Fine. The Cisco configuration command is switchport protected. It helps control virus outbreaks if machines designated

Re: Big Temporary Networks

2012-09-21 Thread William Herrin
On Thu, Sep 20, 2012 at 11:54 PM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: Tony Hain wrote: where an IPv6 multicast RA allows all the devices to configure based on reception of a single packet. You miss multicast storm caused by DAD. This is a long solved issue. First, it

Re: Big Temporary Networks

2012-09-21 Thread Masataka Ohta
William Herrin wrote: You miss multicast storm caused by DAD. Second, in the hotspot scenarios where this is likely to be a problem (in IPv4 -or- IPv6) it's addressed by the AP isolation feature As you stated : I think Masataka meant to say (and said previously) that the DHCP : request from

Re: Big Temporary Networks

2012-09-20 Thread Masataka Ohta
David Miller wrote: So, a single example of IPv4 behaving in a suboptimal manner would be enough to declare IPv4 not operational? For example? Masataka Ohta

Re: Big Temporary Networks

2012-09-20 Thread TJ
On Thu, Sep 20, 2012 at 2:21 AM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: David Miller wrote: So, a single example of IPv4 behaving in a suboptimal manner would be enough to declare IPv4 not operational? For example? Heavy reliance on broadcast for a wide range of

Re: Big Temporary Networks

2012-09-20 Thread Jay Ashworth
- Original Message - From: William Herrin b...@herrin.us My point is that blaming union contracts or union anything for being unable to find a place to hold a convention where you can implement the network you want to implement is nonsense. NANOG, ARIN and IETF conferences have all

Re: Big Temporary Networks

2012-09-20 Thread Jay Ashworth
- Original Message - From: Rick Alfvin ralf...@verilan.com Verilan is the exclusive network services provider for NANOG, IEEE 802, IETF, ICANN, ZigBee Alliance, MAAWG, OIF, GENIVI, Tizen and many other technical organizations. We deploy large temporary networks to provide high

Re: Big Temporary Networks

2012-09-20 Thread joel jaeggli
On 9/20/12 9:52 AM, Jay Ashworth wrote: I'm quite certain I have a good idea of the magnitude of what you'd charge for professional services for such work, and I would expect it to be 2-3 orders of magnitude larger than what a Worldcon Concom could afford to pay. :-) I would also be very

RE: Big Temporary Networks

2012-09-20 Thread Tony Hain
-Original Message- From: Masataka Ohta [mailto:mo...@necom830.hpcl.titech.ac.jp] Sent: Wednesday, September 19, 2012 11:21 PM To: David Miller Cc: nanog@nanog.org Subject: Re: Big Temporary Networks David Miller wrote: So, a single example of IPv4 behaving in a suboptimal

Re: Big Temporary Networks

2012-09-20 Thread Masataka Ohta
TJ wrote: So, a single example of IPv4 behaving in a suboptimal manner would be enough to declare IPv4 not operational? For example? Heavy reliance on broadcast for a wide range of instances where the traffic is really only destined for a single node would seem to be rather sub-optimal.

Re: Big Temporary Networks

2012-09-20 Thread Masataka Ohta
Tony Hain wrote: So, a single example of IPv4 behaving in a suboptimal manner would be enough to declare IPv4 not operational? For example? Your own example --- ... that a very crowded train arrives at a station and all the smart phones of passengers try to connect to APs ... IPv4

Re: Big Temporary Networks

2012-09-19 Thread Seth Mos
Op 18-9-2012 22:50, William Herrin schreef: On Tue, Sep 18, 2012 at 4:31 PM, Nick Hilliard n...@foobar.org wrote: On 18/09/2012 21:24, William Herrin wrote: IPv6 falls down compared to IPv4 on wifi networks when it responds to a router solicitation with a multicast (instead of unicast) router

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
William Herrin wrote: Unicast since its responding to a solicitation? RFC4861 states: A router MAY choose to unicast the response directly to the soliciting host's address (if the solicitation's source address is not the unspecified address), but the usual case is to

Re: Big Temporary Networks

2012-09-19 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Tue, Sep 18, 2012 at 01:03:00PM -0700 Quoting Jo Rhett (jrh...@netconsonance.com): On Sep 13, 2012, at 7:29 AM, Jay Ashworth wrote: I'm talking to the people who will probably be, in 2015, running the first Worldcon I can practically drive

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
Seth Mos wrote: Yes, radvd has a configuration option to send unicast packets. But I think the effects are slightly overstated. A senario considered by IEEE11ai is that a very crowded train arrives at a station and all the smart phones of passengers try to connect to APs. Then, it is

Re: Big Temporary Networks

2012-09-19 Thread TJ
SNIP The only thing operators have to know about IPv6 is that IPv6, as is currently specified, is not operational. I think it is safe to say that this is provably false. Are there opportunities for increased efficiency, perhaps ... however: I get native IPv6 at home via my standard

Re: Big Temporary Networks

2012-09-19 Thread Sean Harlow
On Sep 19, 2012, at 04:25, Masataka Ohta wrote: As I already stated, DHCP discover/request from STA to AP is unicast. This didn't sound right, so I decided to test. With the three clients available to me (laptop running OS X 10.7.4, phone running Android 4.0, and iPod running iOS 4.1.2) all

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
Sean Harlow wrote: As I already stated, DHCP discover/request from STA to AP is unicast. This didn't sound right, so I decided to test. Your test is invalid. With the three clients available to me (laptop running OS X 10.7.4, phone running Android 4.0, and iPod running iOS 4.1.2) all

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
TJ wrote: The only thing operators have to know about IPv6 is that IPv6, as is currently specified, is not operational. I think it is safe to say that this is provably false. You failed to do so. Are there opportunities for increased efficiency, perhaps ... however: Congestion collapse is

Re: Big Temporary Networks

2012-09-19 Thread Valdis . Kletnieks
On Thu, 20 Sep 2012 06:54:35 +0900, Masataka Ohta said: Sean Harlow wrote: As I already stated, DHCP discover/request from STA to AP is unicast. This didn't sound right, so I decided to test. Your test is invalid. You forgot to include a .jpg of Darth Vader playing bagpipes on a

Re: Big Temporary Networks

2012-09-19 Thread William Herrin
On Wed, Sep 19, 2012 at 11:33 AM, Sean Harlow s...@seanharlow.info wrote: On Sep 19, 2012, at 04:25, Masataka Ohta wrote: As I already stated, DHCP discover/request from STA to AP is unicast. This didn't sound right, so I decided to test. With the three clients available to me (laptop

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
William Herrin wrote: I think Masataka meant to say (and said previously) that the DHCP request from the wifi station is, like all packets from the wifi station to the AP, subject to wifi's layer 2 error recovery. It's not unicast but its subject to error recovery anyway. Mostly correct.

Re: Big Temporary Networks

2012-09-19 Thread TJ
On Wed, Sep 19, 2012 at 9:24 PM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: A single counter example is enough to deny IPv6 operational. Really? If that is really your opinion, the entire conversation is a rather moot point as I believe you and pretty much the rest of the world

Re: Big Temporary Networks

2012-09-19 Thread Masataka Ohta
TJ wrote: A single counter example is enough to deny IPv6 operational. Really? With the Internet wide scope, yes, of course. In general, as IPv6 was designed to make ND uber Alles, not IP uber Alles, and ND was designed by a committee with only ATM, Ethernet and PPP in mind, ND can not be an

Re: Big Temporary Networks

2012-09-19 Thread David Miller
On 9/19/2012 11:33 PM, Masataka Ohta wrote: TJ wrote: A single counter example is enough to deny IPv6 operational. Really? With the Internet wide scope, yes, of course. So, a single example of IPv4 behaving in a suboptimal manner would be enough to declare IPv4 not operational? Reductio

Re: Big Temporary Networks

2012-09-18 Thread Masataka Ohta
William Herrin wrote: OTOH, IPv6 requires many multicast received by STAs: RA and NS for DAD, for example. Worse, minimum intervals of ND messages are often very large, which means a lot of delay occurs when a message is lost. Hi Masataka, Where do things go wrong? OTOH, IPv6

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
On Sep 13, 2012, at 7:29 AM, Jay Ashworth wrote: I'm talking to the people who will probably be, in 2015, running the first Worldcon I can practically drive to, in Orlando, at -- I think -- the Disney World Resort. I've told them how critical the issue is for this market; they, predictably,

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
On Sep 14, 2012, at 8:53 AM, Jay Ashworth wrote: Tech had a person managing the feed to DragonCon from the dedicated room w/ the polycomm video conference system, for panels, in addition to the actual union operator of the camera such. The camera ops had to be union? Hmmm. Ah, Chicago.

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
On Sep 14, 2012, at 1:55 PM, Jay Ashworth wrote: That's an interesting question indeed. The optimal solution here, of course, would be for Worldcons -- which are planned 3-4 years in advance -- to get the right technical people in the loop with the property to see when in the next 2 years

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 8:16 AM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: William Herrin wrote: In IPv6, the station sends an ICMPv6 router solicitation instead of an ARP for the default gateway. This is a multicast message but since it's from the station to the AP it's subject to

Re: Big Temporary Networks

2012-09-18 Thread Nick Hilliard
On 18/09/2012 21:24, William Herrin wrote: IPv6 falls down compared to IPv4 on wifi networks when it responds to a router solicitation with a multicast (instead of unicast) router advertisement. You mean it has one extra potential failure mode in situations where radio retransmission doesn't

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 4:11 PM, Jo Rhett jrh...@netconsonance.com wrote: On Sep 14, 2012, at 8:53 AM, Jay Ashworth wrote: Tech had a person managing the feed to DragonCon from the dedicated room w/ the polycomm video conference system, for panels, in addition to the actual union operator of

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 4:31 PM, Nick Hilliard n...@foobar.org wrote: On 18/09/2012 21:24, William Herrin wrote: IPv6 falls down compared to IPv4 on wifi networks when it responds to a router solicitation with a multicast (instead of unicast) router advertisement. You mean it has one extra

RE: Big Temporary Networks

2012-09-18 Thread Naslund, Steve
not want to join the union. Steven Naslund -Original Message- From: William Herrin [mailto:b...@herrin.us] Sent: Tuesday, September 18, 2012 3:48 PM To: Jo Rhett Cc: NANOG Subject: Re: Big Temporary Networks On Tue, Sep 18, 2012 at 4:11 PM, Jo Rhett jrh...@netconsonance.com wrote: On Sep 14

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 5:12 PM, Naslund, Steve snasl...@medline.com wrote: The trick is that there is no right to work if you are a guest at the hotel. You have no right to work on their property without their consent. In reality, the hotels do not want union headaches so that is the way it

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
NOTE: None of the following content can be typed into your router. It holds information only slightly relevant to networking. On Sep 18, 2012, at 1:47 PM, William Herrin wrote: That has been true everywhere that Worldcon has been for a number of years, excluding Japan. Hotel union contracts

Re: Big Temporary Networks

2012-09-18 Thread Robert Bonomi
From: William Herrin b...@herrin.us Date: Tue, 18 Sep 2012 16:47:34 -0400 Subject: Re: Big Temporary Networks On Tue, Sep 18, 2012 at 4:11 PM, Jo Rhett jrh...@netconsonance.com wrote: On Sep 14, 2012, at 8:53 AM, Jay Ashworth wrote: Tech had a person managing the feed to DragonCon from

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
On Sep 18, 2012, at 2:38 PM, William Herrin wrote: IIRC when the Democatic National Convention was held in Denver in 2008, they had to strike a special deal with the venue to bring in union labor instead of the normal workers because they couldn't find a suitable place that was already union.

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 6:14 PM, Jo Rhett jrh...@netconsonance.com wrote: Not being aware of which states have this law, it's entirely possible that the intersection between states that have this law and states which have enough scifi fans willing to get together to host a worldcon is

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 6:22 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote: 'Right to work', as defined by section 14 B of the Taft-Hartley Act, only prevents a union contract that requiures union membership as a PRE-REQUISITE for being hired. What is called 'closed shop' -- where

Re: Big Temporary Networks

2012-09-18 Thread William Herrin
On Tue, Sep 18, 2012 at 6:44 PM, Jo Rhett jrh...@netconsonance.com wrote: On Sep 18, 2012, at 2:38 PM, William Herrin wrote: IIRC when the Democatic National Convention was held in Denver in 2008, they had to strike a special deal with the venue to bring in union labor instead of the normal

Re: Big Temporary Networks (Dreamforce)

2012-09-18 Thread Ryan Malayter
Anyone from nanog currently at the wheel of the conference network at Dreamforce in San Francisco (nearly 7 attendees)? It appears that all of the suggestions posted to this nanog thread so far were thoroughly ignored. Conference WiFi is effectively unusable, despite the very visible,

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
There were enough fans among the 600,000 folks in the Baltimore area but not enough an hour away among the 5,600,000 in the National Capital Region to justify hosting a Worldcon a couple miles inside the Virginia border where no unions would get in your way? Really? Having grown up and

Re: Big Temporary Networks

2012-09-18 Thread Jo Rhett
On Tue, Sep 18, 2012 at 6:44 PM, Jo Rhett jrh...@netconsonance.com wrote: On Sep 18, 2012, at 2:38 PM, William Herrin wrote: IIRC when the Democatic National Convention was held in Denver in 2008, they had to strike a special deal with the venue to bring in union labor instead of the normal

Re: Big Temporary Networks

2012-09-18 Thread Robert Bonomi
From: William Herrin b...@herrin.us Date: Tue, 18 Sep 2012 19:04:22 -0400 Subject: Re: Big Temporary Networks On Tue, Sep 18, 2012 at 6:22 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote: 'Right to work', as defined by section 14 B of the Taft-Hartley Act, only prevents a union

Re: Big Temporary Networks

2012-09-18 Thread George Herbert
...@herrin.us Date: Tue, 18 Sep 2012 19:04:22 -0400 Subject: Re: Big Temporary Networks On Tue, Sep 18, 2012 at 6:22 PM, Robert Bonomi bon...@mail.r-bonomi.com wrote: 'Right to work', as defined by section 14 B of the Taft-Hartley Act, only prevents a union contract that requiures union membership

Re: Big Temporary Networks

2012-09-18 Thread Randy Bush
So I just want to point out that this is an utterly irrelevant topic. Worldcon is full to the brim with really smart people who can build good networks, but in every place large enough to host a Worldcon the owners of the building make money selling Internet access and don't want competition.

Re: Big Temporary Networks

2012-09-17 Thread Nick Hilliard
On 17/09/2012 00:42, Masataka Ohta wrote: OTOH, IPv6 requires many multicast received by STAs: RA and NS for DAD, for example. Worse, minimum intervals of ND messages are often very large, which means a lot of delay occurs when a message is lost. So, what you're saying here is that a wifi

Re: Big Temporary Networks

2012-09-17 Thread Masataka Ohta
Nick Hilliard wrote: OTOH, IPv6 requires many multicast received by STAs: RA and NS for DAD, for example. Worse, minimum intervals of ND messages are often very large, which means a lot of delay occurs when a message is lost. So, what you're saying here is that a wifi network with lots of

Re: Big Temporary Networks

2012-09-17 Thread Niels Bakker
* joe...@bogus.com (joel jaeggli) [Sun 16 Sep 2012, 18:42 CEST]: We tend to engineer for a maximum of around 50 associations per radio (not AP). beyond that performance really starts to suck which can be measured along a multitude of dimensions. The most visible one to the client(s) being

Re: Big Temporary Networks

2012-09-17 Thread William Herrin
On Sun, Sep 16, 2012 at 7:42 PM, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: ARP and DHCP usually work. For an unusual case of ARP for other STAs, collisions do increase initial latencies, but as refreshes are attempted several times, there will be no latter latencies. OTOH, IPv6

Re: Big Temporary Networks

2012-09-16 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Sat, Sep 15, 2012 at 01:11:54PM -0500 Quoting Jimmy Hess (mysi...@gmail.com): On 9/15/12, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: Mans Nilsson wrote: I am not suggesting that. I'm just trying to point out that there might

Re: Big Temporary Networks

2012-09-16 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Sat, Sep 15, 2012 at 10:15:26PM -0400 Quoting Eric Adler (eapt...@gmail.com): Are you working with locally originated video or video that originates as DVB-T? I'm looking at a similar project to replace NTSC distribution around the facility where I

Re: Big Temporary Networks

2012-09-16 Thread Jay Ashworth
- Original Message - From: Masataka Ohta mo...@necom830.hpcl.titech.ac.jp Jay Ashworth wrote: You're saying that *receiving* multicast streams over WLAN works poorly? Multicast/broadcast over congested WLAN works poorly, because there can be no ACK. That is,

Re: Big Temporary Networks

2012-09-16 Thread Jay Ashworth
- Original Message - From: Gaurab Raj Upadhaya gau...@lahai.com So you're *REALLY* motivated on this reduce the coverage thing, then. you could say yes :), reduce the coverage per-AP. Most APs I have seen will start failing with about ~100 associations and not to forget about

Re: Big Temporary Networks

2012-09-16 Thread joel jaeggli
On 9/16/12 9:24 AM, Jay Ashworth wrote: - Original Message - From: Gaurab Raj Upadhaya gau...@lahai.com So you're *REALLY* motivated on this reduce the coverage thing, then. you could say yes :), reduce the coverage per-AP. Most APs I have seen will start failing with about ~100

Re: Big Temporary Networks

2012-09-16 Thread Nick Hilliard
On 14/09/2012 12:38, Paul Thornton wrote: Veering slightly off-topic for NANOG, but is this worth taking onto the address policy mailing list ahead of RIPE65 to ensure people who aren't in the WG session are aware of the issue - and can therefore support (or question) any proposed changes? I

Re: Big Temporary Networks

2012-09-16 Thread Masataka Ohta
Jay Ashworth wrote: Well, yes, but that wasn't what Bill was talking about. He was talking about AP's being nice to associated clients who are in powersave mode, at the expensive of all the other connected clients, by buffering multicast packets until one or more DTIM frames are sent. I

Re: Big Temporary Networks

2012-09-16 Thread Nick Hilliard
On 16/09/2012 19:30, Masataka Ohta wrote: Thus, protocols heavily depending on broadcast/multicast, such as ND, will suffer. ok, you've trolled me enough to ask why ND is worse than ARP on a wavelan network - in your humble opinion? Nick

Re: Big Temporary Networks

2012-09-16 Thread Masataka Ohta
Nick Hilliard wrote: Thus, protocols heavily depending on broadcast/multicast, such as ND, will suffer. ok, you've trolled me enough to ask why ND is worse than ARP on a wavelan network - in your humble opinion? Because, with IPv4: 1) broadcast/multicast from a STA attacked to an

Re: Big Temporary Networks

2012-09-16 Thread Masatoshi Enomoto
Masataka Ohta mo...@necom830.hpcl.titech.ac.jp: Nick Hilliard wrote: Thus, protocols heavily depending on broadcast/multicast, such as ND, will suffer. ok, you've trolled me enough to ask why ND is worse than ARP on a wavelan network - in your humble opinion? Because, with IPv4:

Re: Big Temporary Networks

2012-09-15 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Fri, Sep 14, 2012 at 09:40:02AM -0400 Quoting Jay Ashworth (j...@baylink.com): - Original Message - From: Måns Nilsson mansa...@besserwisser.org 12:20:33AM -0700 Quoting Octavio Alvarez (alvar...@alvarezp.ods.org): I'd have expected

Re: Big Temporary Networks

2012-09-15 Thread Will Hargrave
On 13 Sep 2012, at 17:32, Tim Franklin t...@pelican.org wrote: You'll need a beefy NAT box. Linux with Xeon CPU and 4GB RAM minimum. Or not. The CCC presentation is showing *real* Internet for everyone, unless I'm very much mistaken… Absolutely. NAT is too fragile/expensive/non-performant

Re: Big Temporary Networks

2012-09-15 Thread Masataka Ohta
Mans Nilsson wrote: Do not NAT. When all those people want to do social networking to the same furry BBS while also frequenting three social app sites simultaneously you are going to get Issues if you NAT. So don't. I am not suggesting that. I'm just trying to point out that there might be

Re: Big Temporary Networks

2012-09-15 Thread Jimmy Hess
On 9/15/12, Masataka Ohta mo...@necom830.hpcl.titech.ac.jp wrote: Mans Nilsson wrote: I am not suggesting that. I'm just trying to point out that there might be a bunch of assumptions that aren't as true anymore when a lot of client connections share both source and destination address, and

Re: Big Temporary Networks

2012-09-15 Thread Jay Ashworth
- Original Message - From: Måns Nilsson mansa...@besserwisser.org It would still be nice to multicast them inside our network (and out to whomever wants to watch), but what the heck's the consumer-level client side of multicast video streaming look like these days? IIRC a number

Re: Big Temporary Networks

2012-09-15 Thread William Herrin
On Sat, Sep 15, 2012 at 9:18 PM, Jay Ashworth j...@baylink.com wrote: You're saying that *receiving* multicast streams over WLAN works poorly? I don't have any experience with it, but here's what Google told me: http://www.wireless-nets.com/resources/tutorials/802.11_multicasting.html When any

Re: Big Temporary Networks

2012-09-15 Thread Jay Ashworth
- Original Message - From: William Herrin b...@herrin.us On Sat, Sep 15, 2012 at 9:18 PM, Jay Ashworth j...@baylink.com wrote: You're saying that *receiving* multicast streams over WLAN works poorly? I don't have any experience with it, but here's what Google told me:

Re: Big Temporary Networks

2012-09-15 Thread Masataka Ohta
Jay Ashworth wrote: You're saying that *receiving* multicast streams over WLAN works poorly? Multicast/broadcast over congested WLAN works poorly, because there can be no ACK. That is, multicast/broadcast packets lost by collisions are never sent again.

Re: Big Temporary Networks

2012-09-14 Thread Octavio Alvarez
On Thu, 13 Sep 2012 14:45:55 -0700, Jay Ashworth j...@baylink.com wrote: - Original Message - From: Måns Nilsson mansa...@besserwisser.org 04:05:41PM + Quoting Dylan Bouterse (dy...@corp.power1.com): I'm not sure if this is obvious for this list or not, but with your WiFi

Re: Big Temporary Networks

2012-09-14 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Thu, Sep 13, 2012 at 05:45:55PM -0400 Quoting Jay Ashworth (j...@baylink.com): - Original Message - At all possible cost, avoid login or encryption for the wireless. Yes, and no. snip Just keep in mind that every action you make

Re: Big Temporary Networks

2012-09-14 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Fri, Sep 14, 2012 at 12:20:33AM -0700 Quoting Octavio Alvarez (alvar...@alvarezp.ods.org): I'd have expected someone to have QoS mentioned already, mainly to put FTP and P2P traffic on the least important queues and don't hog up the net. As long

Re: Big Temporary Networks

2012-09-14 Thread Jeroen Massar
To all folks running NOC's at events like CCC/Assembly/DEFCON/etc: hats off, and enjoy the fun ;) On 2012-09-14 09:34 , Måns Nilsson wrote: [..] A couple hours will get the user over a lunch break if not overnight, which means that long TCP sessions survive on Proper Computers (that don't tear

Re: Big Temporary Networks

2012-09-14 Thread Brandon Ross
On Thu, 13 Sep 2012, Jay Ashworth wrote: Get lots of IP addresses. A /16 probably still can be borrowed for this kind of event. I know RIPE had rules and addresses for this kind of use a couple years ago, at least. Indeed? I did not see that coming. Hell, perhaps Interop could be talked

Re: Big Temporary Networks

2012-09-14 Thread Mikael Abrahamsson
On Fri, 14 Sep 2012, Brandon Ross wrote: On Thu, 13 Sep 2012, Jay Ashworth wrote: Get lots of IP addresses. A /16 probably still can be borrowed for this kind of event. I know RIPE had rules and addresses for this kind of use a couple years ago, at least. Indeed? I did not see that coming.

Re: Big Temporary Networks

2012-09-14 Thread Nick Hilliard
On 13/09/2012 21:32, Måns Nilsson wrote: Get lots of IP addresses. A /16 probably still can be borrowed for this kind of event. I know RIPE had rules and addresses for this kind of use a couple years ago, at least. yes, you can get a bunch of IP addresses from the ripe ncc if you only need

Re: Big Temporary Networks

2012-09-14 Thread Nat Morris
On 14 September 2012 11:16, Nick Hilliard n...@foobar.org wrote: On 13/09/2012 21:32, Måns Nilsson wrote: Get lots of IP addresses. A /16 probably still can be borrowed for this kind of event. I know RIPE had rules and addresses for this kind of use a couple years ago, at least. yes, you can

Re: Big Temporary Networks

2012-09-14 Thread Nick Hilliard
On 14/09/2012 11:50, Nat Morris wrote: The RIPE hostmaster would only allocate us address space 7 days before the event started, needed longer than this to begin building out the network which span multiple data centres. Especially with time, access and change freeze constraints due to the

Re: Big Temporary Networks

2012-09-14 Thread Nat Morris
On 14 September 2012 11:54, Nick Hilliard n...@foobar.org wrote: On 14/09/2012 11:50, Nat Morris wrote: The RIPE hostmaster would only allocate us address space 7 days before the event started, needed longer than this to begin building out the network which span multiple data centres.

Re: Big Temporary Networks

2012-09-14 Thread Tore Anderson
* Nick Hilliard They've allocated a /14 for this purpose, so this would be well more than enough to cope with most large conferences. It's actually a /13 (151.216.0.0/13). -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com

Re: Big Temporary Networks

2012-09-14 Thread Mikael Abrahamsson
On Fri, 14 Sep 2012, Tore Anderson wrote: It's actually a /13 (151.216.0.0/13). It used to be in another place (I don't remember exactly, this was 5-8 years ago). Nice that they have a /13 nowadays anyway, I'd imagine there are more temporary events nowadays. I've used it a couple of

Re: Big Temporary Networks

2012-09-14 Thread Nick Hilliard
On 14/09/2012 12:11, Mikael Abrahamsson wrote: I've used it a couple of times and then a week was sufficient (start rigging on monday, everything done by thursday morning where 5000 people show up with their computers (this was mainly 10/100 ports, people brought their own cables), teardown

Re: Big Temporary Networks

2012-09-14 Thread Mikael Abrahamsson
On Fri, 14 Sep 2012, Nick Hilliard wrote: Also, 1 week is not suitable for debogonisation. Could you please elaborate on this aspect? Who would be treating this space as a bogon, and why? -- Mikael Abrahamssonemail: swm...@swm.pp.se

Re: Big Temporary Networks

2012-09-14 Thread Paul Thornton
On 14/09/2012 12:19, Nick Hilliard wrote: On 14/09/2012 12:11, Mikael Abrahamsson wrote: I've used it a couple of times and then a week was sufficient (start rigging on monday, everything done by thursday morning where 5000 people show up with their computers (this was mainly 10/100 ports,

Re: Big Temporary Networks

2012-09-14 Thread Masataka Ohta
Måns Nilsson wrote: And get v6. Do not NAT. When all those people want to do social networking to the same furry BBS while also frequenting three social app sites simultaneously you are going to get Issues if you NAT. So don't. Don't? Considering that, ten years ago, some computers were

Re: Big Temporary Networks

2012-09-14 Thread Måns Nilsson
Subject: Re: Big Temporary Networks Date: Fri, Sep 14, 2012 at 09:22:01PM +0900 Quoting Masataka Ohta (mo...@necom830.hpcl.titech.ac.jp): Måns Nilsson wrote: And get v6. Do not NAT. When all those people want to do social networking to the same furry BBS while also frequenting three

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Sean Lazar kn...@toaster.net WLAN in large conferences certainly is a challenge. You basically want to get as many people on 5GHz as possible due to more available channels. 2.4GHz becomes quite noisy. And here you raise an interesting question: do dual

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Måns Nilsson mansa...@besserwisser.org 05:45:55PM -0400 Quoting Jay Ashworth (j...@baylink.com): - Original Message - At all possible cost, avoid login or encryption for the wireless. Yes, and no. snip Just keep in mind that every action

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Måns Nilsson mansa...@besserwisser.org 12:20:33AM -0700 Quoting Octavio Alvarez (alvar...@alvarezp.ods.org): I'd have expected someone to have QoS mentioned already, mainly to put FTP and P2P traffic on the least important queues and don't hog up the

Re: Big Temporary Networks

2012-09-14 Thread Chris Adams
Once upon a time, Jay Ashworth j...@baylink.com said: Well, we'll be on the *sending* end of the Hugo's, but... ;-) You might want to talk to whoever did this year's WorldCon networking. I'm a Dragon*Con volunteer, and I know there was a some type of direct connection between Chicago (WorldCon)

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Chris Adams cmad...@hiwaay.net Once upon a time, Jay Ashworth j...@baylink.com said: Well, we'll be on the *sending* end of the Hugo's, but... ;-) You might want to talk to whoever did this year's WorldCon networking. I'm a Dragon*Con volunteer, and I

Re: Big Temporary Networks

2012-09-14 Thread Chris Adams
Once upon a time, Jay Ashworth j...@baylink.com said: My understanding was that Dragon *took its main feed* for the Hugos via Ustream, and the entire room got left standing; no? I don't know; I wasn't in there, and I didn't find out about the Ustream cut until I was home. I would think I would

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Chris Adams cmad...@hiwaay.net Subject: Re: Big Temporary Networks Once upon a time, Jay Ashworth j...@baylink.com said: My understanding was that Dragon *took its main feed* for the Hugos via Ustream, and the entire room got left standing; no? I don't

Re: Big Temporary Networks

2012-09-14 Thread Jay Ashworth
- Original Message - From: Matthew Barr mb...@snap-interactive.com and as I was working the Hugo's: On Sep 14, 2012, at 10:14 AM, Jay Ashworth j...@baylink.com wrote: - Original Message - From: Chris Adams cmad...@hiwaay.net I know some of that went on, yes, and

Re: Big Temporary Networks

2012-09-14 Thread Chris Adams
Once upon a time, Jay Ashworth j...@baylink.com said: Noted. How big is that crew for Dragon; you were, what, 30k attendees? The estimate I heard was 52,000-55,000 paid attendees this year (plus another 3,000+ for volunteers, guests+spouse/agent/etc., press, etc.). Our Techops staff was around

Re: Big Temporary Networks

2012-09-14 Thread Leo Bicknell
In a message written on Fri, Sep 14, 2012 at 11:53:01AM -0400, Jay Ashworth wrote: Yes, and I'm told by my best friend who did attend (I didn't make it this year) that the hotel wired/wifi was essentially unusable, every time he tried. Hence my interest in the issue. I find more and more

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