hi,
when i try to ping a SM i have the problem that the ping command give me this result:
Request failed for the first package and give me a correct response for the other three packages…
What can be the problem?
Usually that it means the alignment is not correct. You should re-align your Canopys and see the values of Jitter and RSSI ( http://motorola.canopywireless.com/supp … d=338&c=18 ).
- What is the distance between the devices?
- What is the average response time between them? (you should post the ping results here)
- What are the values of Jitter and RSSI?
- What is the exactly model of Canopy you are using?
- What is the average throughput?
i have only this problem in the sm where nat is enable…
the sm has good value of RSSI (-41 dbm) and jitter (1) because is distance from the ap is less than 392 feet
Don’t know if you are pinging from the client side (Ethernet side) or WLAN side (Wireless side).
have you tried uprading the software?
This is typical in a bridged network. The ARP entry in your router has cleared and the first ping fails because it is used to create the new ARP entry. This entry will time out after a period unless you are using a ping monitoring program which keeps the ARP alive.
On the other hand, -41dB at the AP is a problem.
Set the SM’s output power to 7dBm. After setting the power and rebooting the SM, look at the power level from the SM in AP’s session page. It should be around -62dB. The power in the SM’s status page will still be -41dB. This is because the AP is still at full power, NOT a problem.
AP (Tx 28dBm / Rx -62dB) <------> SM (Tx 7dBm /Rx -41dB )
But if i use prizmems i have the problem that i can’t poll the element…
I don’t understand the question of the 41 dbm… This is the value of teh RSSI of the SM why i have to set the sm power to 7 dbm? It is related with the RSSI???
Poll the element every 5 minutes and it should respond. If it does not try increasing the Bridge Entry Timeout to be higher than the polling interval of Prism.
The AP sees each SM in terms of Power Level. If you look at the AP’s session page it has the following information (key information in BOLD):
LUID: 002 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Joe Customer
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 499 (approximately 13.89 miles (73353 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1777/1802 Jitter (Avg/Last): 5/5 Power Level (Avg/Last): -66/-66
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 18 Rate 2X/1X
The Power Level is the amount of signal the AP is seeing from the SM. As much as possible you want to keep this level from each SM between -65dB and -75dB. This level is adjusted by varying the power level of the SM. If the AP is seeing the SM Power Level at -41, that is too much signal and the SM’s power level needs to be reduced.
Explained another way:
The AP and SM are both a receiver and a transmitter. The receiver on the AP is fixed at -90dB. The receiver on the SM is fixed at -86dB and these cannot be changed. The transmitter on the AP and the SM can be varied. Typically we will set the AP to maximum power, and vary the power on the SM.
SM’s pick up the signal from a single source which is the AP it is configured to associate to. We may have one SM receiving the AP signal at -41dB (very high), and another SM receiving the same AP at -77dB (very low). Because the SM’s only need to pick up the signal from that one AP, this difference is not an issue.
AP’s need to be able to pick up the signal from many SM’s. If one of the SM’s power level is excessively high (-41dB) it can blind the AP receiver from picking up a weaker SM’s signal (-77dB). You would want to lower the output power on the SM that has the higher signal so that it’s signal at the AP is closer to the weaker SM’s power level.
Take a look at the following AP’s session page. Notice that the Power Level for each SM is fairly close to the target of -65 to -75dB even though the SM’s range from 1.6 miles to over 15 miles. This was acheived by lowering the output of the closer SM’s and leaving the 15 mile SM’s at full power. We also use lower gain antennas for the closer SM’s and higher gain antennas for the distant SM’s.
LUID: 002 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Kevin Dutt
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 499 (approximately 13.89 miles (73353 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1777/1802 Jitter (Avg/Last): 5/5 Power Level (Avg/Last): -66/-66
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 18 Rate 2X/1X
LUID: 003 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Anthony Grundstadt
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 382 (approximately 10.64 miles (56154 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1686/1682 Jitter (Avg/Last): 4/3 Power Level (Avg/Last): -68/-68
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 600 UpLimit(SM): 600 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 19 Rate 2X/1X
LUID: 004 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Andy Dickson
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 458 (approximately 12.75 miles (67326 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1689/1691 Jitter (Avg/Last): 4/2 Power Level (Avg/Last): -68/-68
DnRate(SM): 1800 DnLimit(SM): 1800 UpRate(SM): 900 UpLimit(SM): 900 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 20 Rate 2X/1X
LUID: 005 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Walter Chincilla
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 492 (approximately 13.70 miles (72324 feet))
Session Count: 2, Reg Count 2, Re-Reg Count 0
RSSI (Avg/Last): 1591/1588 Jitter (Avg/Last): 4/3 Power Level (Avg/Last): -71/-71
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 21 Rate 2X/1X
LUID: 006 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Solari
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 514 (approximately 14.31 miles (75558 feet))
Session Count: 4, Reg Count 4, Re-Reg Count 0
RSSI (Avg/Last): 1686/1677 Jitter (Avg/Last): 4/3 Power Level (Avg/Last): -68/-68
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 400 UpLimit(SM): 400 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 22 Rate 2X/1X
LUID: 007 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : CDF Station
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 81 (approximately 2.26 miles (11907 feet))
Session Count: 2, Reg Count 2, Re-Reg Count 0
RSSI (Avg/Last): 1565/1555 Jitter (Avg/Last): 4/5 Power Level (Avg/Last): -71/-72
DnRate(SM): 256 DnLimit(SM): 256 UpRate(SM): 128 UpLimit(SM): 128 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 23 Rate 1X/1X
LUID: 008 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Horan
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 492 (approximately 13.70 miles (72324 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1731/1730 Jitter (Avg/Last): 3/3 Power Level (Avg/Last): -67/-67
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 400 UpLimit(SM): 400 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 24 Rate 2X/1X
LUID: 009 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Kai Earles
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 416 (approximately 11.58 miles (61152 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1635/1632 Jitter (Avg/Last): 4/3 Power Level (Avg/Last): -69/-69
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 25 Rate 2X/1X
LUID: 010 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Dominguez
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 498 (approximately 13.86 miles (73206 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1601/1600 Jitter (Avg/Last): 4/4 Power Level (Avg/Last): -70/-70
DnRate(SM): 2400 DnLimit(SM): 2400 UpRate(SM): 1200 UpLimit(SM): 1200 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 26 Rate 2X/1X
LUID: 011 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : HIE Brentwood
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 422 (approximately 11.75 miles (62034 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1544/1552 Jitter (Avg/Last): 6/5 Power Level (Avg/Last): -72/-72
DnRate(SM): 1800 DnLimit(SM): 1800 UpRate(SM): 900 UpLimit(SM): 900 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 27 Rate 2X/1X
LUID: 012 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Saeedi
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 91 (approximately 2.53 miles (13377 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1588/1586 Jitter (Avg/Last): 5/5 Power Level (Avg/Last): -71/-71
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 28 Rate 1X/1X
LUID: 013 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Brentwood Press - Antioch
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 338 (approximately 9.41 miles (49686 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1646/1638 Jitter (Avg/Last): 7/4 Power Level (Avg/Last): -69/-69
DnRate(SM): 1800 DnLimit(SM): 1800 UpRate(SM): 900 UpLimit(SM): 900 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 29 Rate 2X/1X
LUID: 014 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Renner, Adda
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 542 (approximately 15.09 miles (79674 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1651/1660 Jitter (Avg/Last): 3/4 Power Level (Avg/Last): -69/-69
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 500 UpLimit(SM): 500 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 30 Rate 1X/1X
LUID: 015 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Brentwood Press Brentwood
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 413 (approximately 11.50 miles (60711 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1685/1688 Jitter (Avg/Last): 4/4 Power Level (Avg/Last): -68/-68
DnRate(SM): 10000 DnLimit(SM): 10000 UpRate(SM): 10000 UpLimit(SM): 10000 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 31 Rate 2X/1X
LUID: 016 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Revel
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 519 (approximately 14.45 miles (76293 feet))
Session Count: 3, Reg Count 2, Re-Reg Count 1
RSSI (Avg/Last): 1581/1592 Jitter (Avg/Last): 8/6 Power Level (Avg/Last): -71/-71
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 400 UpLimit(SM): 400 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 32 Rate 2X/1X
LUID: 017 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Matt Merideth
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 410 (approximately 11.41 miles (60270 feet))
Session Count: 210, Reg Count 210, Re-Reg Count 0
RSSI (Avg/Last): 1482/1482 Jitter (Avg/Last): 9/6 Power Level (Avg/Last): -75/-75
DnRate(SM): 600 DnLimit(SM): 600 UpRate(SM): 300 UpLimit(SM): 300 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 33 Rate 1X/1X
LUID: 018 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Mike Dachuk
Software Version : CANOPY 7.3.6 Oct 24 2005 12:06:56
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 497 (approximately 13.84 miles (73059 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1675/1670 Jitter (Avg/Last): 3/3 Power Level (Avg/Last): -68/-69
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 400 UpLimit(SM): 400 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 34 Rate 2X/1X
LUID: 019 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Rob Mills
Software Version : CANOPY 7.2.9 Jul 23 2005 01:49:03
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 59 (approximately 1.64 miles (8673 feet))
Session Count: 4, Reg Count 2, Re-Reg Count 2
RSSI (Avg/Last): 1739/1715 Jitter (Avg/Last): 3/2 Power Level (Avg/Last): -67/-68
DnRate(SM): 1800 DnLimit(SM): 1800 UpRate(SM): 400 UpLimit(SM): 400 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 35 Rate 2X/1X
LUID: 020 : MAC: 00-00-00-00-00-00 State: IDLE
Session Timeout: 0, AirDelay 461 (approximately 12.83 miles (67767 feet))
Session Count: 8, Reg Count 8, Re-Reg Count 0
RSSI (Avg/Last): 1466/1467 Jitter (Avg/Last): 6/6 Power Level (Avg/Last): -76/-76
DnRate(AP): 20000 DnLimit(AP): 500000 UpRate(AP): 20000 UpLimit(AP): 500000 (kbit)
LoUpCIR(D): 0 LoDnCIR(D): 0 (kbps)
Rate : VC 36 Rate 1X/1X
LUID: 021 : MAC: 00-00-00-00-00-00 State: IN SESSION (Encrypt Disabled)
Site Name : Sue Flagg
Software Version : CANOPY 7.2.9 Jul 23 2005 01:49:03
Software Boot Version : CANOPYBOOT 3.0
FPGA Version : 070605 (DES Sched) P9
Session Timeout: 0, AirDelay 483 (approximately 13.45 miles (71001 feet))
Session Count: 1, Reg Count 1, Re-Reg Count 0
RSSI (Avg/Last): 1604/1605 Jitter (Avg/Last): 5/3 Power Level (Avg/Last): -70/-70
DnRate(SM): 1200 DnLimit(SM): 1200 UpRate(SM): 600 UpLimit(SM): 600 (kbit)
LoUpCIR(SM): 0 LoDnCIR(SM): 0 (kbps)
Rate : VC 37 Rate 2X/1X
thanks a lot for the suggestions.
I have put the output power level at 7 dbm but the RSSI is now around -51 dbm.
have I still to modify the output power on the sm?
-51 is better than -41.
You could probably live with this until you get to about 20 users on that AP, and then your more distant users will start dropping off. I would put a low gain indoor antenna (6-8dB) in the house - the walls should give you another 10dB of loss putting that SM around -60dB.
If you get jiter of 7-8 while traffic is passing through, that is OK. Better to have that one SM with slightly higher jitter than to adversely affect the rest of your users.
Jerry
but i can modify the output power on the SM and put it less than 7 dBm?
isn’t that a 900? 7dB is as low as you can go.
If it’s a newer 2400 I think you can go even lower
it is a 5400
Does it have a reflector? If it does, take it off.
I have not used the 5400, but I assume its the same software so you should be able to lower the power to 2-3 dB.
it hasn’t reflector…
now i put the out power to 4 dbm and i have a RSSI of -58dbm…
thanks thanks
Power is measured in dBm… 