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Low PPP throughput

Posted on 2000-05-10
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Last Modified: 2008-03-03
I'm having problems with my dialup connection.  This just started happenening 2 days ago with no problems in the previous 2 months since a disrto upgrade.  I use kppp to dialup.  Everytime I dial-in, the throughput is only ~50bps if that.  I've tried 3 different ISPs and 3 different users.  I've rebooted and tried again with no luck.  I booted to BeOS and (ugh)Win98 and connected at 33.6k with no problems.  What gives?
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Question by:ashcraft
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tzanger earned 300 total points
ID: 2798569
Several things:

- check the MTU of the connection -- should be about 596 or 1500 (people have reported problems with the latter) -- this can be set in your /etc/ppp/options file.

- did you change your serial port setup at all?  is it a 16550A or a 16450?  this makes an incredible difference.  That "A" is important if you have a 16550.

- do you somehow have multiple routes?  what's route -n show?  There should only be one network route per network, and one defaultroute in most setups.  

There are other things, but since you said it worked before I'm inclined to think it's one of these problems.
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by:ashcraft
ID: 2798614
Well, I booted back to Linux and everything seems to be working fine now.  I didn't tinker with anything beforehand, I just left for the weekend, came back and the problem occurred.  I didn't try to adjust anything either after logging back in.  Strange....
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