Saturday, July 10, 2010

slow internet as a bottom line

My internet service was highly unstable and my uploads the worst. Completely unpredictable. this forced the main isp links to go down and require a reboot for fast recovery. Cause of the problem, squid was running out of file descriptors. That was a bug from running delay pools on very old version of squid say version 2.5. to fix this had to move all connections depending on delay pools to another bandwidth controller and disabling delay pools.

Friday, June 4, 2010

fix for last post

I had a bad amplifier .... yeah so it was adding alot of noise. there you have it. Lesson learnt change high power systems every 4 years whether they are bad or not.

Sunday, February 28, 2010

wireless thoroughput problem

problem profile
- the quality of internet has dropped to near zero as it has become completely unreliable and unstable.
- when clients try to connect to lexican the pings go very high at this point, until they are settled, this was notice after rstp was enabled.


attempts to a solution
- tried changing frequency
- looking at disabling some clients
- rstp was enabled
- mtu on wireless was reduced to 1450


inference
- there are just too many devices in the air over 100
- when lexican is off lexican2 works well more often that not but still not as good as it should or used to be.
-at some point the wireless interface on lexican was disabled and the traffic was still high passing through it

applied remedies
- first, lexican was turned off till we were ready for extensive tests
- second, lexicans card was changed to another in case age was getting to it.
- wds was changed to static and later disabled
- rstp was enabled on the bridges all connected to the 192.168.6.8 network on all devices, somehow lexican was the root and the traffic flowing to it when it had a disabled interface dropped form 60kbps to 5kbps average
- mtu on lexican wireless was reduce to 1450