Matt, you will need to configure Jabber on the School server so that the XO's are not running in mesh while they are at the school. You want them to use a regular access point because 200 XO's all meshing in one place will crash your network.
Jabber emulates the mesh-functionality so kids can use the sharing features even though the mesh is effectively turned off when you use a regular wireless router. You set the Jabber server individually on each XO by doing the following from the command line: sugar-control-panel -s jabber servername Here is the wiki page on EJabber config, it's a bit complex http://wiki.laptop.org/go/Ejabberd_Configuration Wish I could help more but we've got teacher training starting in 2 days and a ton of work ahead of us. On Thu, 2008-03-27 at 08:06 -0400, Greg Smith (gregmsmi) wrote: > Hi Matt, (Bryan or Sulochan, please see questions for you below), > > Sorry we didn't get you an answer before this but thanks for reaching > out and following up! > > Do you have a server (e.g. school server) in place? > > We probably do not have a tested and approved wireless AP with router, > firewall and DHCP. The original idea was that routing, firewall and > DHCP are done on the server. > > That said we may be able to find someone to help test and qualify an AP > with your requirements. > > You may want to focus on connectivity and defer mesh support until > later. I know that mesh is a core application but there are some open > issues with it right now. > > What is your time frame? > > If you come up with a list of absolutely must have minimum things you > need done and a date, that helps focus everyone on getting you launched. > Then we can add the next level of applications in a second pass. > > If we don't nail your answer by tomorrow AM US ET, I'll bring it up on > the server and development lists to see if I can get more input. > > Bryan and Sulochan, > > I know its crunch time in the Himalayas but some input ASAP would be > greatly appreciated for this roll out in Cambodia. > > What access point did you deploy? Do you have a suggestion for one that > has a built in router? > > Are you going ahead with the mesh turned on or should we defer that? > > BTW congratulations on your success and thanks for all your great blogs, > e-mail lists, forums and feedback (http://www.olenepal.org/)! It really > helps other sites and helps focus development on real user needs. The > fun part is just beginning :-) > > Thanks, > > Greg S > > > -----Original Message----- > From: matt wolstencroft [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 27, 2008 4:58 AM > To: Greg Smith (gregmsmi) > Subject: Fwd: Re: [laptop.org #8321] Questions about XO mesh networking > > Hi, > I have been trying to find out from [EMAIL PROTECTED] what wireless router > will be compatible with our 200 XOs after we found out that the WRT54Gv7 > has problems due to WDS. So far I have had no response and my colleague > Phillip gave me your email in the hope that you might be able to help. I > have included the email history below to give you some context. > > Could you recommend a wireless AP with router, 2 antennas (pref rev > tnc), compatible with 802.11g & 802.11b, stateful firewall, DHCP, 4 > 10/100 LAN ports and costing around $100? The main criteria is that it > does not have any problems with XO mesh networks. > > Any assistance would be greatly appreciated. > > Thanks, Matt > > > -- > Matt Wolstencroft > [EMAIL PROTECTED] > > -- > http://www.fastmail.fm - One of many happy users: > http://www.fastmail.fm/docs/quotes.html > > ----- Original message ----- > From: "matt wolstencroft" <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Date: Mon, 24 Mar 2008 20:19:49 +1100 > Subject: Re: [laptop.org #8321] Questions about XO mesh networking > > Hi, > Thanks for the quick response. I have a few more questions : > > 1. Will automatic MPP be turned on in future builds? > > 2. According to the OpenWrt website, the WRT54Gv7 cannot run the openwrt > firmware. I just want to clarify that in this case we will have to > replace the router? > > 3. The DLink equipment is just an AP. Could you recommend any wireless > routers? Or is there a more up to date list than this : > http://wiki.laptop.org/go/Wireless_Access_Point_Compatibility? > > Thanks very much for your help, > Regards, > Matt > > On Sun, 23 Mar 2008 20:01:45 -0400, [EMAIL PROTECTED] said: > > On Sat Mar 22 01:44:19 2008, [EMAIL PROTECTED] wrote: > > > Hi, > > > I have just started working at Reaksmy school in Cambodia with 200 > > > XOs (build 656). Access to the Internet is via a satellite which is > > > connected to a linksys WRT54G v7 with the latest firmware > (v7.00.4). > > > The wireless configuration of the router is as follows : > > > > > > Channel : 11 > > > Encryption : none > > > Wireless SSID broadcast : enabled > > > > > > Documentation I have read suggests that the mesh networking should > > > work in the following manner: > > > > > > - majority of XOs in the mesh act as mesh points : "uses its WiFi > > > interface to both access the network itself and to relay traffic > > > from other mesh points" > > > - certain XOs will act as mesh portals (MPP): "connected to an > > > external network, and that forward traffic in and out of the mesh" > > > - an XO will associate itself with a mesh based on the following : > > > > 1. The laptop will issue a DHCP request, followed by a RREQ for a > > > Mesh Portal anycast address and wait for RREP replies, on all > three > > > channels being proposed for OLPC meshes (1, 6, and 11) before > making > > > any decisions. > > > 2. If any channel provides a lower hop count to a Mesh Portal, it > is > > > selected unless its signal strength is significantly lower. > > > 3. If all channels provide the same hop count to a Mesh Portal, > > > random selection is used. > > > > > > I have a few questions regarding the mesh networking and the > > > configuration of the WRT54G: > > > > > > 1. Is automatic MPP turned off in build 656 and is it enabled as > per: > > > > "http://wiki.laptop.org/go/Test_Config_Notes#Turn_on_MPP_Capability";? > > It is turned off now and in all current builds. > > > > > 2. What are the determining factors that affect which XOs become > > > mesh portals? > > Every laptop that can see a AP can become a MPP if that functionality > > is enabled. > > > > > 3. We have been seeing intermittent dropouts of connection to the AP > > > > forboth XOs and normal laptops. Are there any known problems with > > > the WRT54G and the XOs? > > From Michail Bletsas, in charge of connectivity: > > "Using WDS frames for the mesh traffic turns out that it creates > > serious interoperability problems with WDS-capable access points that > > > implement Dynamic establishment of links with other WDS peers (like > > the ubiquitous Linksys WRT54 router/AP). We found that out during > > field testing and it took several months to identify all the failure > modes." > > > > So the answer to whether you should/can use WRT54Gx APs is "only if > > you can upgrade them to an OpenWRT variant". "A good starting point > > should be the DLINK DWL-2100AP which uses an Atheros Chipset." > > > > > > > > > > 4. Is there any recommended/tested firmware for the WRT54G v7? Is > > > openwrt tested/supported? > > > > It has been tested by users, but no offical testing has been > undergone. > > Users report that OpenWRT does not have the problems of the original > > firmware. > > > 5. If we were to replace the WRT54G is there a list of preferred > > > wireless equipment for OLPC systems? > > > > See answer to #3. > > > > > 6. Some documentation I have seen suggests that wireless APs should > > > be configured to use channel 1,6 or 11. Is this still the case? > > > > > > > > > 7. If the steps listed above are correct then we should see XOs > > > forming and connecting to mesh networks on channel 1,6,11 however > > > they always seem to form a mesh on channel 1. Is this correct? > > > > XO's search all 3 mesh channels, looking for a school server running > > on that mesh channel. When they don't see a school server on any of > > the three channels, they connect to a serverless mesh on channel 1. > > > > > 8. Can XOs connected to different mesh networks currently see each > > > other? > > > > No. Each mesh channel is a totally independent network running at a > > different frequency. However, if there is a school server with > > multiple antennas, it can route packets between the networks. > > Therefore, if there is a school server with 3 mesh antennae, XO's can > > use all 3 channels, and all see each other. > > > > > > > > > > 9. Our XOs can see the AP in the neighborhood view and when they > > > connect to it, they become disconnected from the mesh network. Is > > > this correct behavior? > > > > Yes. When MPP mode is disabled, an XO will only connect to either an > > Access Point or a mesh > > channel, but not both. > > > Any assistance would be greatly appreciated. Thanks in advance, > > > > > > Matt Wolstencroft > > > > The above answeres were provided by Ben Schwartz (author of the > > Distance activity), and the quotes were from Michail Bletsas. > > > > Keep in mind I am not an OLPC employee, I am a support volunteer. if > > this does not answer your questions try [EMAIL PROTECTED], as it is > > > answered by OLPC staff. > > -- > > Thanks, > > FFM > > OLPC Support Volunteer > -- > Matt Wolstencroft > [EMAIL PROTECTED] > > -- > http://www.fastmail.fm - One of many happy users: > http://www.fastmail.fm/docs/quotes.html > _______________________________________________ Server-devel mailing list [email protected] http://lists.laptop.org/listinfo/server-devel
