Hi,
On Fri, 22 May 2009 01:02:31 -0300 (BRT) Murilo da Silva Ijanc wrote:
> Hello misc@,
>
> I am trying to use 3G technology in OpenBSD.
I have Huawei E220. After a few days of tweaking, I got it working pretty
well. There are some caveats however. (See below)
> $ ping -c 4 www.google.com
> PING google.navigation.opendns.com (208.69.32.231): 56 data bytes
> 64 bytes from 208.69.32.231: icmp_seq=0 ttl=51 time=679.708 ms
For some reason ping times are big with user space ppp.
(600+ ms vs. 150ms with in-kernel ppp)
> lynx www.openbsd.org
>
> HTTP request sent; waiting for response.
> .............. 10 min ......... 20 min........
With user space ppp, I had to set MTU to 900 before web browsing
worked. I think I did that using "set mrru 900" in /etc/ppp/ppp.conf.
I recommend that you try kernel mode ppp using pppd. There you can
use bigger MTU/MRRU.
My setup is following:
$ cat /etc/ppp/mokkula
#!/bin/sh
ifconfig ppp0 destroy 1>/dev/null 2>&1
ifconfig ppp0 create
route delete default 1>/dev/null 2>&1
/usr/sbin/pppd /dev/cuaU0 460800 connect '/usr/sbin/chat -f
/etc/ppp/peers/elisa2.chat'
sleep 12
$ cat /etc/ppp/peers/elisa2.chat
ABORT BUSY
ABORT ERROR
ABORT "NO CARRIER"
ABORT VOICE
ABORT "NO DIALTONE"
"" AT
OK AT+CGDCONT=1,"IP","internet","0.0.0.0",0,0
OK ATDT*99#
TIMEOUT 40
CONNECT \c
$ cat /etc/ppp/options
debug
/dev/cuaU0
460800
lock
persist
noauth
0.0.0.0:10.0.0.2
netmask 255.255.255.255
ipcp-accept-local
ipcp-accept-remote
noipdefault
crtscts
deflate 0
bsdcomp 0
noccp
novj
novjccomp
nopcomp
#nodetach
mru 1440
refuse-chap
connect '/usr/sbin/chat -f /etc/ppp/peers/elisa2.chat'
$
Like others suggested, enabling "debug" option gives you some hints.
Also, using cu directly ("cu -s 460800 -l /dev/cuaU0") and sending
AT commands gives you more hints. (For example, you might be required
to give PIN code with AT+CPIN command.)
--
Tero Koskinen <tero.koski...@iki.fi>
