> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Jonathan Hall
> Sent: Tuesday, February 29, 2000 10:32 PM
> To: [EMAIL PROTECTED]
> Subject: Problems with lost packets
>
>
> I've got a PPP connection between two Linux boxes I admin. Each box is
> using a USR Courier, so they're connecting at 33.6 (or sometimes slower).
>
> All is working well... for a while. After an inconsistant amount of time
> (sometimes 5 minutes, sometimes hours) after a PPP connection is
> established, I begin experiencing 50% packet loss. Exactly 50%.
>
> I get this type of output when I do a ping:
>
> PING border-wichita.futureks.net (209.134.106.1): 56 data bytes
> 64 bytes from 209.134.106.1: icmp_seq=0 ttl=253 time=449.2 ms
> 64 bytes from 209.134.106.1: icmp_seq=2 ttl=253 time=395.9 ms
> 64 bytes from 209.134.106.1: icmp_seq=4 ttl=253 time=335.4 ms
>
> tcpdumps on either side of the connection are not entirely conclusive...
>
> I see two ICMP echo requests go out, then I see one ICMP echo reply come in.
>
> On the other side, I see one request for each reply. I'm not (as of yet)
> sure if only half of the requests are being recieved, or if they're all
> being received and replied to, but only half of the replies are being
> received.
>
> I'd test that right now, but it's not acting up yet... hasn't been for a few
> hours. But it inevitably will soon enough.
>
> One side of the connection is a 486DX4/100, 12mb RAM, kernel 2.2.14 and pppd
> 2.3.5. The other side is a P133, 8mb RAM, kernel 2.0.38 and pppd 2.3.5.
>
> Any ideas of what's causing the problem? Or any ideas of what logs or
> debugging output to generate or look for to track down the problem a bit
> more?
Strange. I'm having the same problem using a similar setup. But the problem
seems to only occur when the link is heavily loaded. It'll sit there and idle
for hours on end, but if I start a big download or try streaming MP3's across
the link it'll start dropping packets. If I reset the link, everything works
okay until the load gets high again. I've yet to nail down the exact trigger,
nor have I figured out the cause. Let me know if you stumble across the answer,
and I'll do the same.
--dwh
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Dale W Hodge * [EMAIL PROTECTED] * [EMAIL PROTECTED] * [EMAIL PROTECTED]
-- www.neuralmatrix.org * www.dnd-automotive.com --
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