Lost Packets
Joe Drumm
investigating, I noticed that just about every other packet is lost (from
using PING).
On the same machine with the same connection under Windows, there is no
problem.
The assigned remote address ends in .0 (130.67.66.0) - is that normal?
Here is the start of the ppp.log:
Also, there are echo packets every 30 seconds, is that normal as well?
Thanks
Joe
Apr 17 20:06:12 valkyrie pppd[425]: Serial connection established.
Apr 17 20:06:13 valkyrie pppd[425]: Using interface ppp0
Apr 17 20:06:13 valkyrie pppd[425]: Connect: ppp0 <--> /dev/ttyS0
Apr 17 20:06:13 valkyrie pppd[425]: sent [LCP ConfReq id=0x1 <asyncmap 0x0>
<magic 0xf2254644> <pcomp> <accomp>]
Apr 17 20:06:13 valkyrie pppd[425]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0>
<magic 0xf2254644> <pcomp> <accomp>]
Apr 17 20:06:14 valkyrie pppd[425]: rcvd [LCP ConfReq id=0x1d <auth chap 05>
<magic 0x879d0eae> < 11 04 05 f4> < 13 0e 01 6f 6e 6c 69 6e 65 2d 69 73 64
6e>]
Apr 17 20:06:14 valkyrie pppd[425]: sent [LCP ConfRej id=0x1d < 11 04 05 f4>
< 13 0e 01 6f 6e 6c 69 6e 65 2d 69 73 64 6e>]
Apr 17 20:06:14 valkyrie pppd[425]: rcvd [LCP ConfReq id=0x1e <auth chap 05>
<magic 0x879d0eae>]
Apr 17 20:06:14 valkyrie pppd[425]: sent [LCP ConfAck id=0x1e <auth chap 05>
<magic 0x879d0eae>]
Apr 17 20:06:14 valkyrie pppd[425]: sent [LCP EchoReq id=0x0
magic=0xf2254644]
Apr 17 20:06:14 valkyrie pppd[425]: rcvd [CHAP Challenge id=0xc9
<9fcb0ce2418fcc7826112e889a10ad44>, name = "provider"]
Apr 17 20:06:14 valkyrie pppd[425]: sent [CHAP Response id=0xc9
<82bbbe6ee3393c133ac89a5ec5f1900f>, name = "my-account-name"]
Apr 17 20:06:14 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x0
magic=0x879d0eae]
Apr 17 20:06:15 valkyrie pppd[425]: rcvd [CHAP Success id=0xc9 ""]
Apr 17 20:06:15 valkyrie pppd[425]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0>
<compress VJ 0f 01>]
Apr 17 20:06:15 valkyrie pppd[425]: rcvd [IPCP ConfReq id=0x65 <addr
130.67.66.0>]
Apr 17 20:06:15 valkyrie pppd[425]: sent [IPCP ConfAck id=0x65 <addr
130.67.66.0>]
Apr 17 20:06:17 valkyrie pppd[425]: rcvd [IPCP ConfReq id=0x66 <addr
130.67.66.0>]
Apr 17 20:06:17 valkyrie pppd[425]: sent [IPCP ConfAck id=0x66 <addr
130.67.66.0>]
Apr 17 20:06:18 valkyrie pppd[425]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0>
<compress VJ 0f 01>]
Apr 17 20:06:18 valkyrie pppd[425]: rcvd [IPCP ConfRej id=0x1 <compress VJ
0f 01>]
Apr 17 20:06:18 valkyrie pppd[425]: sent [IPCP ConfReq id=0x2 <addr
0.0.0.0>]
Apr 17 20:06:18 valkyrie pppd[425]: rcvd [IPCP ConfNak id=0x2 <addr
130.67.67.205>]
Apr 17 20:06:18 valkyrie pppd[425]: sent [IPCP ConfReq id=0x3 <addr
130.67.67.205>]
Apr 17 20:06:18 valkyrie pppd[425]: rcvd [IPCP ConfAck id=0x3 <addr
130.67.67.205>]
Apr 17 20:06:18 valkyrie pppd[425]: Cannot determine ethernet address for
proxy ARP
Apr 17 20:06:18 valkyrie pppd[425]: local IP address 130.67.67.205
Apr 17 20:06:18 valkyrie pppd[425]: remote IP address 130.67.66.0
Apr 17 20:06:44 valkyrie pppd[425]: sent [LCP EchoReq id=0x1
magic=0xf2254644]
Apr 17 20:06:44 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x1
magic=0x879d0eae]
Apr 17 20:07:14 valkyrie pppd[425]: sent [LCP EchoReq id=0x2
magic=0xf2254644]
Apr 17 20:07:14 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x2
magic=0x879d0eae]
Apr 17 20:07:44 valkyrie pppd[425]: sent [LCP EchoReq id=0x3
magic=0xf2254644]
Apr 17 20:07:44 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x3
magic=0x879d0eae]
Apr 17 20:08:14 valkyrie pppd[425]: sent [LCP EchoReq id=0x4
magic=0xf2254644]
Apr 17 20:08:15 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x4
magic=0x879d0eae]
Apr 17 20:08:44 valkyrie pppd[425]: sent [LCP EchoReq id=0x5
magic=0xf2254644]
Apr 17 20:08:45 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x5
magic=0x879d0eae]
Apr 17 20:09:14 valkyrie pppd[425]: sent [LCP EchoReq id=0x6
magic=0xf2254644]
Apr 17 20:09:15 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x6
magic=0x879d0eae]
Apr 17 20:09:45 valkyrie pppd[425]: sent [LCP EchoReq id=0x7
magic=0xf2254644]
Apr 17 20:09:45 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x7
magic=0x879d0eae]
Apr 17 20:10:15 valkyrie pppd[425]: sent [LCP EchoReq id=0x8
magic=0xf2254644]
Apr 17 20:10:15 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x8
magic=0x879d0eae]
Apr 17 20:10:45 valkyrie pppd[425]: sent [LCP EchoReq id=0x9
magic=0xf2254644]
Apr 17 20:10:45 valkyrie pppd[425]: rcvd [LCP EchoRep id=0x9
magic=0x879d0eae]
Apr 17 20:11:15 valkyrie pppd[425]: sent [LCP EchoReq id=0xa
magic=0xf2254644]
Apr 17 20:11:15 valkyrie pppd[425]: rcvd [LCP EchoRep id=0xa
magic=0x879d0eae]
Andrew Sun - UCE revokable account
Joe Drumm wrote:
>
> I posted a message before about a slow PPP connection. After some more
Some items to check regarding slow PPP connections:
. Be sure your modem init string completely resets
the modem to a factory default, hardware flow control, state.
Additional init strings can make adjustments afterwards.
(That means; do not use AT Z)
. Is serial interface IRQ conflict free, and does it match what the
OS believes?
. Serial interface hardware flow and modem control enabled?
(pppd options "crtscts" and "modem")
. Certain characters may get munged in transit.
Try asyncmap 0, asyncmap a0000, asyncmap ffffffff, and default-asyncmap.
Your mileage may vary, since there are many more possible failure modes.
> investigating, I noticed that just about every other packet is lost (from
> using PING).
This may or may not be a problem. Net congestion is frequent.
It may be a problem if your loss is consistent, and if your pinging
the far end of the PPP connection.
Some of the fault items I noted above could result in sporadic
behaviors.
>
> On the same machine with the same connection under Windows, there is no
> problem.
>
In that case, match as many of the Windows settings with your Linux settings.
That includes the modem init string which you can find somewhere in
the Windows registry.
Windows requests asyncmap a0000.
> The assigned remote address ends in .0 (130.67.66.0) - is that normal?
This is ok when the subnetting results in a hostid field
that exceeds 8 bits.
>
> Here is the start of the ppp.log:
>
> Also, there are echo packets every 30 seconds, is that normal as well?
It's normal, since it appears that you requested it.
You must have included lcp-echo-interval 30 as one of your options to pppd.
>
> Thanks
>
> Joe
>
andrew
--
"Using & Managing PPP," March 1999, http://www.oreilly.com/catalog/umppp