Hi Erik.

Thank you for the comments, you wrote:

 > What you're seeing indicates a mismatch of either or both the network mask
 > and/or the IP network number. I'd contact your ISP and reconfirm the
 > numbers they gave you for your manual configuration against what you're
 > seeing on the network wire because they don't match.

I have done that via email, but I am still waiting for an answer.
Tomorrow I am going to call them, but the problem is: Oficially
they will only support Windows and MacOS.

Besides, I have configured a PC with the supplied parameters and
it works!

 > Until then, you can probably make this work by using 192.168.80.234 instead
 > of 192.168.89.234 on your Ethernet interface.

I tried this today, here is some configurations and a tcpdump of the
command ping -c gateway(192.168.80.254):


bash$ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags     Refs     Use    Mtu  Interface
default            192.168.80.254     UGS         0       33      -  em0
127.0.0.1          127.0.0.1          UH          0        0      -  lo0
192.168.80         link#1             UC          0        0      -  em0
192.168.80.234/32  00:00:a4:11:57:d8  ULS2        0        0      -  lo0
192.168.80.254/32  00:10:4b:6f:8d:b0  ULS2        0        0      -  em0

AppleTalk:
Destination        Gateway            Flags     Refs     Use    Mtu  Interface
bash$ arp -a
riscpc.stofanet.dk (192.168.80.234) at 00:00:a4:11:57:d8 permanent published
gateway (192.168.80.254) at 00:10:4b:6f:8d:b0 permanent published
bash$ tcpdump -evx -s 2048 host riscpc
tcpdump: listening on em0
22:08:17.398705 riscpc.stofanet.dk gateway ip 98: riscpc.stofanet.dk > gateway: icmp: echo request (ttl 255, id 17682)
			 4500 0054 4512 0000 ff01 535d c0a8 50ea
			 c0a8 50fe 0800 8a8d 163f 0000 c1e4 3436
			 7015 0600 0809 0a0b 0c0d 0e0f 1011 1213
			 1415 1617 1819 1a1b 1c1d 1e1f 2021 2223
			 2425 2627 2829 2a2b 2c2d 2e2f 3031 3233
			 3435 3637
22:08:17.429621 gateway Broadcast arp 60: arp who-has riscpc.stofanet.dk tell gateway
			 0001 0800 0604 0001 0010 4b6f 8db0 c0a8
			 50fe 0000 0000 0000 c0a8 50ea 0000 0000
			 0000 0000 0000 0000 0000 0000 0000
22:08:17.429622 riscpc.stofanet.dk gateway arp 60: arp reply riscpc.stofanet.dk is-at riscpc.stofanet.dk
			 0001 0800 0604 0002 0000 a411 57d8 c0a8
			 50ea 0010 4b6f 8db0 c0a8 50fe 0000 0000
			 0000 0000 0000 0000 0000 0000 0000
(the ARP-request/reply sequence repeats 3 times)
^C
56 packets received by filter
0 packets dropped by kernel
bash$ 

As far as I can see there is nothing unusual in the trace,
but maybe someone can correct me?

Regards
-- 
Ib-Michael Martinsen		Email at work: dtpimm@dsg.dk
Fidomail:      2:234/181.9	Email at home: imm@nethotel.dk

Running NetBSD/arm32 v1.3.2 on an Acorn RiscPC with a 202MHz StrongArm.