I found the problem and solved it :
recompiled my kernel and disabled DECNET support (or you can load is as a module and unload it, if it should cause problems)
also be sure to disable the SIOCFFIFLAGS thing...
works like a charm now, as well as ifconfig -a :-)
traceroute to
www.scarlet.be (193.74.71.30), 30 hops max, 38 byte packets
1 192.168.1.1 (192.168.1.1) 1.693 ms 1.665 ms 1.682 ms
2 u81-11-136-1.adsl.scarlet.be (81.11.136.1) 9.485 ms 9.472 ms 9.627 ms
3 u195-95-29-81.vpop-brussel.planetinternet.be (195.95.29.81) 9.517 ms 9.614 ms 10.040 ms
4 Gig-0-1-ias-be-bru-ar01.KPNbelgium.be (194.119.224.129) 10.612 ms 10.366 ms 12.393 ms
5 Gig-0-0-mpl-be-bel-pe01.KPNbelgium.be (194.119.224.140) 11.012 ms 11.237 ms 11.009 ms
6 mpl-be-vil-pe03.vilvoorde.kpn.be (193.74.71.253) 12.268 ms 12.631 ms 12.393 ms
7
www.scarlet.be (193.74.71.30) 13.280 ms 11.512 ms 13.147 ms
###########"
MeMPhiS:/home/memphis# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:00:E8:86:1D:61
inet addr:192.168.1.4 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:796 errors:0 dropped:0 overruns:0 frame:0
TX packets:660 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:105321 (102.8 KiB) TX bytes:59141 (57.7 KiB)
Interrupt:12 Base address:0x5000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:312 (312.0 b) TX bytes:312 (312.0 b)
happy as can be
