Melameth, Daniel D. wrote:
Kevin wrote:
On 6/7/05, Can Erkin Acar <[EMAIL PROTECTED]> wrote:
Melameth, Daniel D. wrote:
Prior to migrating to DSL, this same card was used for a cable
connection and doing more than 1.5Mb/s.
This really does not mean much. It could be a negotiation problem.
Was your old cable modem ethernet connection 10BaseT ?
100baseTX full-duplex
from a previous post ...
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
address: 00:04:75:ac:05:48
media: Ethernet autoselect (100baseTX full-duplex)
Perhaps your ADSL modem/switch has problems negotiating with your
card, or your cable might have problems.
The same cable was used with the Windows box.
It'd help if the OP can provide the output of 'netstat -in' after the
PPPoE has been up for a while.
Here is the output from the time I rebooted the OpenBSD box this morning
till the time I got home from work (which means it didn't get used
much):
$ netstat -in
Name Mtu Network Address Ipkts Ierrs Opkts
Oerrs Colls
lo0 33224 <Link> 0 0 0
0 0
lo0 33224 127/8 127.0.0.1 0 0 0
0 0
lo0 33224 ::1/128 ::1 0 0 0
0 0
lo0 33224 fe80::%lo0/ fe80::1%lo0 0 0 0
0 0
pflog0 33224 <Link> 0 0 0
0 0
pfsync0 2020 <Link> 0 0 0
0 0
enc0* 1536 <Link> 0 0 0
0 0
wi0 1500 <Link> 00:02:6f:09:58:b2 10227 0 11042
0 519
wi0 1500 192.168.255 192.168.255.254 10227 0 11042
0 519
wi0 1500 fe80::%wi0/ fe80::202:6fff:fe 10227 0 11042
0 519
xl0 1500 <Link> 00:04:75:ac:05:48 65278 0 48429
0 0
xl0 1500 192.168.255 192.168.255.221 65278 0 48429
0 0
xl0 1500 fe80::%xl0/ fe80::204:75ff:fe 65278 0 48429
0 0
pppoe0 1492 <Link> 65275 0 48425
3 0
pppoe0 1492 0.0.0.0/32 70.x.x.x 65275 0 48425
3 0
pppoe0 1492 fe80::%pppo fe80::202:6fff:fe 65275 0 48425
3 0
Full-duplex does not detect transmission errors, so you would not
see them on netstat -i output. You could try setting media to
"10BaseT half-duplex" this usually helps you notice if there is a
problem, and can sometimes solve it.
ifconfig takes xl0 media 10baseT, but adding half-duplex yields:
$ sudo ifconfig xl0 media 10baseT half-duplex
ifconfig: half-duplex: bad value
Regardless, with ifconfig xl0 media 10baseT, both the modem and OpenBSD
box show the connection at 10Mb/s, but the issue persists.
And do try another ethernet card if possible.
Seconded on both points.
This is a CardBus card and I only have other 3Coms--I tried another
identical 3Com card with the same poor results.
One thing I've found very helpful in debugging PPPoE has been to use
either the "-tttt" (time between packets) or "-tt" (absolute epoch
time) options on tpcdump, watching the packets on both the real
Ethernet interface and the tunnel (pppoe0) interface, in two
side-by-side windows.
I was about to give this tcpdump timing a shot, but decided to spend a
few more hours trying some other tests. Here is the results of my
findings (all devices connected to the DSL modem were directly
connected):
* Reconfiguring the modem to handle the PPPoE connection, instead of the
OpenBSD box, and reconfiguring the OpenBSD box as a workstation (meaning
no hostname.pppoe0) yields the same 1.5Mb/s Internet download
speed--which would suggest the issue is not with 3.7's kernel pppoe but,
perhaps, related to xl
* Removing the xl card from the OpenBSD box and putting it into a
Windows box yields a 5.5Mb/s Internet download speed--which would
suggest the card performs fine
* Putting the xl card back into the OpenBSD box and performing an ftp
transfer between the OpenBSD box and another box connected via crossover
cable yields a 40Mb/s download speed--I'm not sure what this suggests,
but it seems, in some way, there is some kind of interoperability issue
between xl, OpenBSD and my DSL modem
I have exactly this setup (xl0 connected to DSL modem on a high speed DSL line,
it's a 3c905c card), The modem is an Arescom NetDSL 800 (shitty).
The whole thing won't pass over 50kb/s if the xl0 card is 100baseTX full-duplex
or even 10baseT full duplex.
I have to configure xl0 this way:
# cat /etc/hostname.xl0
inet 192.168.0.254 0xffffff00 NONE media 10baseT
for pppoe to work with *this* ADSL modem.
Meanwhile xl0 in a crossover cable works up to 60Mbps using media 100baseTX
mediaopt full-duplex. The address of xl0 is just there cos I can connect to the
modem's local ip address 192.168.0.1 via Arescom's NetDSL remote manager just to
"watch" the speed the ADSL line have in cloudy days, it drops to 2200Kbps
because my telco has poor cabling.
I'm interested in hearing some feedback on the above tests. Also, since
it seems xl hardware is not well touted by those in the know, what
Ethernet CardBus cards are recommended? I'll assume ne and rl are not
one of these and I'll gladly pickup a recommended CardBus card to
address this issue--particularly if the price is right (thinking eBay).
Thanks again to those who've taken the time to read and respond to this
thread,
Danny
