We are ISP and we give Internet Wireless Outdoor Service . The Base Station works in 802.11b and it is connected with a Linux Mandrake Server that make NAT. Besides the linux Server limit the bandwidth of each Wireless Client, per IP, using an aplication called Traffic Control with CBQ rules. The bandwidth that we are limit is at 32Kb, 48Kb, 64Kb, 72Kb, 96Kb and 128Kb. We have only 26 clients, son we are limiting only 26 Ip numbers at those bandwith. My topology wireless is: Linux Server connected directly with an UTP CrossOver Cable to the AP, and from the AP to the wireless client. The problem I have with CBQ is that for moments I have delay of aprox. 2 or 3 seconds with pings from the Linux Server to some client that are not making any traffic and in that moment if I ping from that client to the AP the delay is only 3ms (that is correct, so the problem is not the wireless link). In a normal condition the ping between the server and the Client would must be around 20 ms, as in several times that I ping to a client that besides it is making traffic and the delay is normal. But sometimes it is not. For example: The following is a ping to a client that has limited to 72Kbps.. in this moments he is not making any traffic in the internet, the normals delay time of ping would be around 6 ms... but in stead of look that response time.... The pings varies from 4ms up to 2 seconds... and I promisse you that he is not trafficking anything.. 64 bytes from 192.168.8.18: icmp_seq=0 ttl=128 time=1.479 sec 64 bytes from 192.168.8.18: icmp_seq=1 ttl=128 time=1.179 sec 64 bytes from 192.168.8.18: icmp_seq=2 ttl=128 time=1.329 sec 64 bytes from 192.168.8.18: icmp_seq=4 ttl=128 time=4.078 msec 64 bytes from 192.168.8.18: icmp_seq=6 ttl=128 time=12.622 msec 64 bytes from 192.168.8.18: icmp_seq=7 ttl=128 time=10.002 msec 64 bytes from 192.168.8.18: icmp_seq=8 ttl=128 time=610.729 msec 64 bytes from 192.168.8.18: icmp_seq=9 ttl=128 time=769.707 msec 64 bytes from 192.168.8.18: icmp_seq=10 ttl=128 time=788.533 msec 64 bytes from 192.168.8.18: icmp_seq=11 ttl=128 time=992.062 msec 64 bytes from 192.168.8.18: icmp_seq=12 ttl=128 time=999.109 msec 64 bytes from 192.168.8.18: icmp_seq=13 ttl=128 time=1.184 sec 64 bytes from 192.168.8.18: icmp_seq=14 ttl=128 time=1.009 sec 64 bytes from 192.168.8.18: icmp_seq=15 ttl=128 time=1.359 sec So I modify the INI files of the CBQ, and I give her 128Kbps and the pings now are normal.... 6ms, 4ms, 10ms... The following is the file I modify... DEVICE=eth1,10mbit,1mbit RATE=128Kbit WEIGHT=12Kbit PRIO=5 BOUNDED=yes ISOLATED=yes RULE=192.168.8.11 RULE=192.168.8.29 RULE=192.168.8.15 RULE=192.168.8.14 RULE=192.168.8.39 RULE=192.168.8.23 RULE=192.168.8.18 RULE=192.168.8.19 You can see I add ip 192.168.8.18 to that list of IP and to that bandwidth... May the problem is the variety of bandwith I have or with the lowest bandwith ( <128Kbps) ...? May the problem is the amount of connections that CBQ have to control...? May the problem is saturate of the CBQ's queue ...? May the problem is some type of hardware problem in the Server (I have a Pentium III 750Mhz - 128 Mb RAM and 20 Gbyte HHD)...? Someone told me use HTB or TBF which is better.. can the one be in the certain thing? I will thank any kind of comments. Bye ------------------------------------ Roberto Ravetti Intercom I.S.P Gerente de Servicios mailto: rravetti@itc.com.ar Te: (54) 3571 427 777 Rio Tercero - Cordoba - Argentina ------------------------------------
