PPP connection freeze

[Axl]

PPP dial-up connection starts well, negotiating and authorizing
complete. I can resolve DNS, ping etc. The connection freeze immediately
after start WWW or FTP or SSH sessions (large incoming data). I can ping
with a large packets (by 1440 bytes) pretty long (much longer than
usual), but connection froze then and ping said "buffer overflow". The
physical connection looks up but no more packets received.

Internal modem work fine under MacOS (like now) and it worked two year
ago at Gentoo 1.4.

I also try IrDA (internal) and USB-Blootooth (GPRS through Nokia),
different kernels, different ppp version - same thing.

I think something wrong in PPP or IP settings, maybe queueing or buffers
size? What else should i check?


Powerbook Wallstreet G3, Kernel 2.6.14, PPP 2.4.3, Gentoo.

Axl

[Shyamal Prasad]

Axl> PPP dial-up connection starts well, negotiating and
Axl> authorizing complete. I can resolve DNS, ping etc. The
Axl> connection freeze immediately after start WWW or FTP or SSH
Axl> sessions (large incoming data). I can ping with a large

Axl> {...delete...]

Axl> I think something wrong in PPP or IP settings, maybe queueing
Axl> or buffers size? What else should i check?

It's been a while since I've used PPP dial up, but this smells of a
bad mtu setting. Take a look and see what the value is ('ifconfig
ppp0' etc. and look for the MTU size). If I remember correctly many
PPP sessions set this to 576, and maybe it is not being negotiated
correctly.

If you believe it works with MacOS and the same provider check the MTU
size with MacOS.

Good luck!

Cheers!
Shyamal

[Axl]

Post by Shyamal Prasad
Axl> PPP dial-up connection starts well, negotiating and
Axl> authorizing complete. I can resolve DNS, ping etc. The
Axl> connection freeze immediately after start WWW or FTP or SSH
Axl> sessions (large incoming data). I can ping with a large
Axl> {...delete...]
Axl> I think something wrong in PPP or IP settings, maybe queueing
Axl> or buffers size? What else should i check?
It's been a while since I've used PPP dial up, but this smells of a
bad mtu setting. Take a look and see what the value is ('ifconfig
ppp0' etc. and look for the MTU size). If I remember correctly many
PPP sessions set this to 576, and maybe it is not being negotiated
correctly.
If you believe it works with MacOS and the same provider check the MTU
size with MacOS.
Good luck!
Cheers!
Shyamal

Thank you.. i tried different MTU and MRU sizes from 300 to 1500... :(