My box is i386 NetBSD 3.0_STABLE, I want to configure it as a PPPoE
server.
I installed pkgsrc/net/rp-pppoe, and configure as below:

/etc/ppp/pppoe-server-options
require-pap
lcp-echo-interval 10
lcp-echo-failure 2
ms-dns 192.168.88.1
ms-dns 202.96.128.68

and run below command in shell
# /usr/pkg/sbin/pppoe-server -I fxp0 -L 192.168.70.1 -R 192.168.70.100
 -N 100

When a Windows XP client connect it, /var/log/messages tell me:

May 30 19:07:04 serv01 pppoe-server[16051]: Session 4 created for client
00:40:c
a:82:8b:96 (192.168.70.103) on fxp0 using Service-Name ''
May 30 19:07:04 serv01 pppd[16051]: pppd 2.4.3 started by water, uid 0
May 30 19:07:04 serv01 pppd[16051]: Using interface ppp0
May 30 19:07:04 serv01 pppd[16051]: Connect: ppp0 <--> /dev/ttyp0
May 30 19:07:04 serv01 pppoe[16275]: Interface=fxp0
HWaddr=00:90:27:22:80:06 Device=/dev/bpf0 Buffer size=32768
May 30 19:07:06 serv01 pppoe[16275]: read (asyncReadFromPPP): Session 4:
Invalid argument
May 30 19:07:06 serv01 pppd[16051]: Modem hangup
May 30 19:07:06 serv01 pppd[16051]: Connection terminated.
May 30 19:07:06 serv01 pppd[16051]: Exit.


What's wrong? What "Invalid argument" means?