[pptp-server] Overruns on sl0/1 causing major network issues!

[Lee Smith]

 I'm having some problems with pptp...On sl0 im getting way too many
 overruns, causing the connection to be horribly unstable.  Any insight as
 to what would cause this kind of behavior? or even better, maybe a fix?
 ;)
 
 sl0       Link encap:VJ Serial Line IP  
           inet addr:192.168.10.91  P-t-P:192.168.66.10
 Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
           RX packets:5086011 errors:0 dropped:0 overruns:5043102 frame:0
              compressed:0
           TX packets:5966257 errors:0 dropped:0 overruns:5915216
 carrier:0
           collisions:1059 compressed:0 txqueuelen:10 
 
 sl1       Link encap:VJ Serial Line IP  
           inet addr:192.168.10.28  P-t-P:192.168.65.14
 Mask:255.255.255.255
           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
           RX packets:245253 errors:0 dropped:0 overruns:240600 frame:0
              compressed:0
           TX packets:327206 errors:0 dropped:0 overruns:312041 carrier:0
           collisions:73 compressed:0 txqueuelen:10 
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