I'm on ADSL with a slow link. Only 4.5 Mbit down/1Mbit up.
When the upload is satturated, the download slows to a crawl - this is well documented behaviour common to ADSL that has something to do with too many ack packets not geting through and/or the router unable to process ack packets fast enough.
QOS is supposed to help - the default clearOS QOS gives highest priority to non-TCP packets (includes ack packets ) so it keeps up.
In practice I'm finding that QOS is not helping.
What does help is to install the old app-bandwidth and set a ceiling rate on uploads that is a little below the maximum (e.g. I throttle uploads to 900kbit when the link is capable of 1000kbit up)
This instantly restores the download speed.
So my Q's.
Why doesnt QOS help?
Why do people say app-bandwidth and app-qos dont play well together? I have them both installed now and can't see any miss-behaviour but not sure what I should be looking for. I'd like to keep QOS around as we run VoIP phones... but only if its useful. app-bandwidth actually seems to solve our VoIP stutter (due to people uploading) better than QOS did.
What am I missing?
When the upload is satturated, the download slows to a crawl - this is well documented behaviour common to ADSL that has something to do with too many ack packets not geting through and/or the router unable to process ack packets fast enough.
QOS is supposed to help - the default clearOS QOS gives highest priority to non-TCP packets (includes ack packets ) so it keeps up.
In practice I'm finding that QOS is not helping.
What does help is to install the old app-bandwidth and set a ceiling rate on uploads that is a little below the maximum (e.g. I throttle uploads to 900kbit when the link is capable of 1000kbit up)
This instantly restores the download speed.
So my Q's.
Why doesnt QOS help?
Why do people say app-bandwidth and app-qos dont play well together? I have them both installed now and can't see any miss-behaviour but not sure what I should be looking for. I'd like to keep QOS around as we run VoIP phones... but only if its useful. app-bandwidth actually seems to solve our VoIP stutter (due to people uploading) better than QOS did.
What am I missing?
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