problems with pptp/ppoe

Hi:
I'm having a high packet loss in a pptp over pppoe connection.
I'm running redhat 7.2.
this is my configuration

ppp0
Link encapoint-to-Point Protocol
inet addr:200.43.98.163 P-t-P:200.3.62.205 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:723637 errors:0 dropped:0 overruns:0 frame:0
TX packets:813075 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:683514148 (651.8 Mb) TX bytes:149121495 (142.2 Mb)

ppp1
Link encapoint-to-Point Protocol
inet addr:200.42.40.207 P-t-P:172.18.8.21 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1200 Metric:1
RX packets:69642 errors:0 dropped:0 overruns:0 frame:0
TX packets:69348 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:54943284 (52.3 Mb) TX bytes:7641220 (7.2 Mb)


Making a ping to my ppp0 peer is allright

PING 200.3.62.205 (200.3.62.205) from 200.43.98.163 : 56(84) bytes of data.
64 bytes from 200.3.62.205: icmp_seq=0 ttl=255 time=253.861 msec
64 bytes from 200.3.62.205: icmp_seq=1 ttl=255 time=51.980 msec
64 bytes from 200.3.62.205: icmp_seq=2 ttl=255 time=60.693 msec
64 bytes from 200.3.62.205: icmp_seq=3 ttl=255 time=105.858 msec
64 bytes from 200.3.62.205: icmp_seq=4 ttl=255 time=79.786 msec
64 bytes from 200.3.62.205: icmp_seq=5 ttl=255 time=250.845 msec
64 bytes from 200.3.62.205: icmp_seq=6 ttl=255 time=234.681 msec
64 bytes from 200.3.62.205: icmp_seq=7 ttl=255 time=175.389 msec
64 bytes from 200.3.62.205: icmp_seq=8 ttl=255 time=94.624 msec
64 bytes from 200.3.62.205: icmp_seq=9 ttl=255 time=93.489 msec

--- 200.3.62.205 ping statistics ---
10 packets transmitted, 10 packets received, 0% packet loss
round-trip min/avg/max/mdev = 51.980/140.120/253.861/76.498 ms

The problem is here, when making a ping to my ppp1 peer or elsewhere

PING 172.18.8.21 (172.18.8.21) from 200.42.40.207 : 56(84) bytes of data.
64 bytes from 172.18.8.21: icmp_seq=0 ttl=255 time=390.533 msec
64 bytes from 172.18.8.21: icmp_seq=2 ttl=255 time=621.400 msec
64 bytes from 172.18.8.21: icmp_seq=3 ttl=255 time=559.223 msec
64 bytes from 172.18.8.21: icmp_seq=4 ttl=255 time=761.934 msec
64 bytes from 172.18.8.21: icmp_seq=5 ttl=255 time=258.543 msec
64 bytes from 172.18.8.21: icmp_seq=6 ttl=255 time=412.075 msec
64 bytes from 172.18.8.21: icmp_seq=7 ttl=255 time=491.941 msec
64 bytes from 172.18.8.21: icmp_seq=8 ttl=255 time=687.906 msec
64 bytes from 172.18.8.21: icmp_seq=9 ttl=255 time=1.170 sec

--- 172.18.8.21 ping statistics ---
10 packets transmitted, 9 packets received, 10% packet loss
round-trip min/avg/max/mdev = 258.543/594.860/1170.187/251.310 ms

PING www.google.com (216.239.33.99) from 200.42.40.207 : 56(84) bytes of data.
64 bytes from 216.239.33.99: icmp_seq=0 ttl=46 time=958.425 msec
64 bytes from 216.239.33.99: icmp_seq=1 ttl=46 time=1.164 sec
64 bytes from 216.239.33.99: icmp_seq=3 ttl=46 time=1.246 sec
64 bytes from 216.239.33.99: icmp_seq=4 ttl=46 time=1.370 sec
64 bytes from 216.239.33.99: icmp_seq=6 ttl=46 time=1.128 sec
64 bytes from 216.239.33.99: icmp_seq=8 ttl=46 time=1.084 sec
64 bytes from 216.239.33.99: icmp_seq=9 ttl=46 time=950.228 msec

--- www.google.com ping statistics ---
10 packets transmitted, 7 packets received, 30% packet loss
round-trip min/avg/max/mdev = 950.228/1129.154/1370.489/139.628 ms

I think the problem is in the pptp configuration o in the pptp driver. I've tried different rmem and mtu values and nothing happens.

 

Have you tried calling the Microsoft Helpline? Just kidding. Redhat is, not my area of expertise, Kodo, what do you see?

-Iceburg