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> >Message: 3 >Date: Tue, 22 Jun 2004 19:14:42 UT >To: "boston linux and unix (blu)" <discuss at blu.org> >From: "dan moylan" <jdm at moylan.info> >Cc: "Derek Atkins" <warlord at mit.edu> >Subject: re: wireless internet > >This is a multi-part message in MIME format. > >--_----------=_108793168284601 >Content-Disposition: inline >Content-Length: 3020 >Content-Transfer-Encoding: binary >Content-Type: text > > >> "dan moylan" <jdm at moylan.info> writes: > >> > i have two laptops, A running fc2 and B running rh9.0. >> > when they are interconnected with 10base-T cables through >> > the netgear router (MR814), file transfers work fine at >> > about 500KB/sec. )B?however, when laptop B is connected to >> > the router via a netgear wireless card (MA401), a strange >> > thing happens. )B?small files transfer ok. ?when i try to >> > send a large (470MB) file from A to B, the file transfer >> > starts out at about 200KB/sec, and rapidly drops, bit >> > by bit to like 1Kb/sec, and then the connection is lost >> > completely. )B?ifconfig (B) shows lots of errors. > >derek a writes: >> Sounds like a noisy radio environment. )B?Did you try changing >> 802.11 channels? > > )B? ?iwconfig eth0 channel 1 > >produces: > > )B? ? Error for wireless request "Set Frequency" (8B04) : > )B? ? ? ? SET failed on device eth0 ; Operation not supported. > >> Did you try turning off your microwave and portable phones? > >no need, microwave off, portable phones all off. > >> did you try moving the base station? > >i tried iwconfig at: > >six feet: > >eth0 )B? ? ?IEEE 802.11-DS ?ESSID:"Wireless" ?Nickname:"Prism ?I" > )B? ? ? ? ?Mode:Managed ?Frequency:2.462GHz ?Access Point: 00:09:5B:23:8A:26 > )B? ? ? ? ?Bit Rate:11Mb/s ? Tx-Power=15 dBm ? Sensitivity:1/3 > )B? ? ? ? ?Retry min limit:8 ? RTS thr:off ? Fragment thr:off > )B? ? ? ? ?Encryption key:off > )B? ? ? ? ?Power Management:off > )B? ? ? ? ?Link Quality:66/92 ?Signal level:-26 dBm ?Noise level:-141 dBm > )B? ? ? ? ?Rx invalid nwid:0 ?Rx invalid crypt:0 ?Rx invalid frag:0 > )B? ? ? ? ?Tx excessive retries:0 ?Invalid misc:0 ? Missed beacon:0 > >however, at six feet the signal level varied from -15 to -45 dBm, >somewhat randomly, which is strange in itself. > >two feet: > >eth0 )B? ? ?IEEE 802.11-DS ?ESSID:"Wireless" ?Nickname:"Prism ?I" > )B? ? ? ? ?Mode:Managed ?Frequency:2.462GHz ?Access Point: 00:09:5B:23:8A:26 > )B? ? ? ? ?Bit Rate:11Mb/s ? Tx-Power=15 dBm ? Sensitivity:1/3 > )B? ? ? ? ?Retry min limit:8 ? RTS thr:off ? Fragment thr:off > )B? ? ? ? ?Encryption key:off > )B? ? ? ? ?Power Management:off > )B? ? ? ? ?Link Quality:84/92 ?Signal level:3/153 ?Noise level:115/153 > )B? ? ? ? ?Rx invalid nwid:0 ?Rx invalid crypt:0 ?Rx invalid frag:0 > )B? ? ? ? ?Tx excessive retries:0 ?Invalid misc:0 ? Missed beacon:0 > >one foot: > >eth0 )B? ? ?IEEE 802.11-DS ?ESSID:"Wireless" ?Nickname:"Prism ?I" > )B? ? ? ? ?Mode:Managed ?Frequency:2.462GHz ?Access Point: 00:09:5B:23:8A:26 > )B? ? ? ? ?Bit Rate:11Mb/s ? Tx-Power=15 dBm ? Sensitivity:1/3 > )B? ? ? ? ?Retry min limit:8 ? RTS thr:off ? Fragment thr:off > )B? ? ? ? ?Encryption key:off > )B? ? ? ? ?Power Management:off > )B? ? ? ? ?Link Quality:92/92 ?Signal level:5/153 ?Noise level:115/153 > )B? ? ? ? ?Rx invalid nwid:0 ?Rx invalid crypt:0 ?Rx invalid frag:0 > )B? ? ? ? ?Tx excessive retries:0 ?Invalid misc:0 ? Missed beacon:0 > >tried the file transfer at one foot with the same result. )B?damn. > >what now? > >tia, >dan > >j. daniel moylan >84 harvard ave #2 >brookline, ma 02446-6202 >617-232-2360 (tel) >810-454-1823 (fax) >jdm at moylan.info >www.moylan.info I believe this is a power manangement issue. Check for a firmcard upgrade to the card.... Though you would problably need to use windows to run the upgrade. I noticed your listings show "power management off" but that might be misleading (maybe you can turn it on and see if that does anything - though I dont think it will) I had a problem (on Linux) like this but I forget if I also needed to upgrade the bios. Also you might check the netgrear site to see if they have a newer router patch -- after I patched my (older) linksys router things where a whole lot nicer all around. Rob Winchester mipsv at netscape.net __________________________________________________________________ Switch to the New Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp
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