ORBIT-USER: wireless interface setup problems

Sumathi Gopal sumathi at winlab.rutgers.edu
Mon Feb 26 11:46:15 EST 2007


Hi shyam,

It could be about subnets... You have IP addresses in different subnets.
Try using the same subnet for both nodes (such as 10.10.1.102 and 
10.10.1.12) .

Otherwise set up static routes in the nodes, and disable ARP.

Sumathi

Shanmuga S Anandaraman wrote:
> hi all,
>
> After doing proper configurations,sometimes i find that the packets 
> don't get across the nodes through wireless interface.I just try to 
> check if ping works and that fails. I have attached the nodes' 
> iwconfig and ifconfig to look into if i haven't configured 
> something.Many of the times the configuration works, but i am 
> wondering why does it fail at times ?? Has any one come across such 
> situation...any suggestions is welcome!!
> node10-2:~# iwconfig ath0
> ath0      IEEE 802.11a  ESSID:"test"
>           Mode:Managed  Frequency:5.18 GHz  Access Point: 
> 00:60:B3:AC:2B:DE
>           Bit Rate=54 Mb/s   Tx-Power:18 dBm   Sensitivity=0/3
>           Retry:off   RTS thr:off   Fragment thr:off
>           Encryption key:off
>           Power Management:off
>           Link Quality=41/94  Signal level=-54 dBm  Noise level=-95 dBm
>           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
>           Tx excessive retries:0  Invalid misc:0   Missed beacon:0
>
> node10-2:~# ifconfig ath0
> ath0      Link encap:Ethernet  HWaddr 00:60:B3:AC:A1:C1
>           inet addr:10.30.10.2  Bcast:10.255.255.255  Mask:255.255.0.0
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:200
>           RX bytes:0 (0.0 b)  TX bytes:378 (378.0 b)
>           Interrupt:7 Memory:de940000-de950000
>
> node10-2:~# ping 10.30.1.2
> PING 10.30.1.2 (10.30.1.2): 56 data bytes
>
>
> --- 10.30.1.2 ping statistics ---
> 197 packets transmitted, 0 packets received, 100% packet loss
> node10-2:~#
>
>
>
> node1-2:~# iwconfig ath0
> ath0      IEEE 802.11a  ESSID:"test"
>           Mode:Master  Frequency:5.18 GHz  Access Point: 
> 00:60:B3:AC:2B:DE
>           Bit Rate=54 Mb/s   Tx-Power:18 dBm   Sensitivity=0/3
>           Retry:off   RTS thr:off   Fragment thr:off
>           Encryption key:off
>           Power Management:off
>           Link Quality=48/94  Signal level=-47 dBm  Noise level=-95 dBm
>           Rx invalid nwid:28  Rx invalid crypt:0  Rx invalid frag:0
>           Tx excessive retries:1  Invalid misc:1   Missed beacon:0
>
> node1-2:~# ifconfig ath0
> ath0      Link encap:Ethernet  HWaddr 00:60:B3:AC:2B:DE
>           inet addr:10.30.1.2  Bcast:10.255.255.255  Mask:255.255.0.0
>           UP BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:185 errors:974 dropped:0 overruns:0 frame:974
>           TX packets:0 errors:1 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:200
>           RX bytes:8800 (8.5 KiB)  TX bytes:0 (0.0 b)
>           Interrupt:7 Memory:de940000-de950000
>
> node1-2:~# ping 10.30.10.2
> PING 10.30.10.2 (10.30.10.2): 56 data bytes
>
> --- 10.30.10.2 ping statistics ---
> 12 packets transmitted, 0 packets received, 100% packet loss
> node1-2:~#
>
> Thanks
> Shanmuga(shyam)




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