How long after a clean boot (or more exactly, how much data was transferred) before you did these tests? The errors shown are much higher than I would expect! Your signal strength levels are excellent, you really shouldn't be having much trouble! However, those signal levels are bothering me for some reason... I don't have a peer-to-peer system configured right now to check, but I don't recall seeing signal strength measurements when I did. Could they be bogus? Hopefully someone can comment further, but I don't think the strength level can shown unless you have a true access point active. You could have several peer-to-peer clients in the area - how does it know which one to measure the strength with?? This is just my bad memory talking, I could be completely off-base with this comment so take it for what it's worth!
Perhaps you could give us some idea of the physical arrangement... how far the units are apart, what sort of obstructions are in between etc. The data transfer rates suggest you are running 5.5Mbit and 2 Mbit rates, not 11. So perhaps you don't have the connection you think you do.
Something else I have learned - if you are connected to an Access Point, you will generally see better download rates than upload rates. I understand this has to do with the size of the packet that the radios exchange (which may not be visible from the interface statistics - this is in the firmware). Larger packets on the upload (more retries in less-than-perfect conditions) than the download. I don't know how peer-to-peer works in this respect. Could the packet sizes differ depending on which direction they travel?
Sorry, I'm probably adding more confusion! However, a little bit of additional information would probably help.
Brock
Message: 1 Date: Wed, 25 Jun 2003 15:50:01 -0300 From: Samuel Abreu de Paula <[EMAIL PROTECTED]> To: Leaf-User <[EMAIL PROTECTED]> Organization: Dna Digital Subject: [leaf-user] One way better than another!
I get two station in ad-hoc mode, making some benchmark with ttcp i get the results:
point 1 # ttcp -n512 -s -t 192.168.55.2 ttcp-t: buflen=8192, nbuf=512, align=16384/0, port=5001 tcp -> 192.168.55.2 ttcp-t: socket ttcp-t: connect ttcp-t: 4194304 bytes in 8.17 real seconds = 501.31 KB/sec +++ ttcp-t: 512 I/O calls, msec/call = 16.34, calls/sec = 62.66 ttcp-t: 0.0user 0.8sys 0:08real 11% 0i+0d 0maxrss 0+2pf 0+0csw
point 2 # ttcp -n512 -s -t 192.168.55.1 ttcp-t: buflen=8192, nbuf=512, align=16384/0, port=5001 tcp -> 192.168.55.1 ttcp-t: socket ttcp-t: connect ttcp-t: 4194304 bytes in 19.16 real seconds = 213.75 KB/sec +++ ttcp-t: 512 I/O calls, msec/call = 38.33, calls/sec = 26.72 ttcp-t: 0.0user 0.6sys 0:19real 3% 0i+0d 0maxrss 0+2pf 0+0csw
The signals are: point 1
netcs0 IEEE 802.11-DS ESSID:"XXX" Nickname:"VLC_HMC"
Mode:Ad-Hoc Frequency:2.462GHz Cell: 02:60:BA:B6:E9:15
Bit Rate:11Mb/s Tx-Power=20 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:XXXX-XXXX-XX Encryption mode:restricted
Power Management:off
Link Quality:88/92 Signal level:-48 dBm Noise level:-100 dBm
Rx invalid nwid:0 Rx invalid crypt:2064 Rx invalid frag:0
Tx excessive retries:2 Invalid misc:21009 Missed beacon:0
point 2 netcs0 IEEE 802.11-DS ESSID:"XXX" Nickname:"VLC_EXT" Mode:Ad-Hoc Frequency:2.462GHz Cell: 02:60:BA:B6:E9:15 Bit Rate:11Mb/s Tx-Power=20 dBm Sensitivity=1/3 Retry min limit:8 RTS thr:off Fragment thr:off Encryption key:XXXX-XXXX-XX Encryption mode:restricted Power Management:off Link Quality:92/92 Signal level:-40 dBm Noise level:-100 dBm Rx invalid nwid:0 Rx invalid crypt:2 Rx invalid frag:0 Tx excessive retries:81 Invalid misc:6874 Missed beacon:0
What is that my packets going from point 2 to point 1 is much slower than the inverse???
Is antenna position???
Samuel Abreu
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