problems with pptp/ppoe

[sickalien]

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 encap:Point-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 encap:Point-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.

[Iceburg]

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

-Iceburg