** Guillaume Marcais (Samstag, 21. Juni 2003 01:07) > To understand what is going on your networks, use tcpdump on both > network. Do something like: > > # tcpdump -i eth0 -l -n > > and > > # tcpdump -i usb0 -l -n > > Then send pings from your pda and follow the path of the query and > response as it goes through you linux box. First ping 192.168.1.1, > you should see a query and response on usb0. Next ping 192.168.0.1, > you should see query/response on both usb0 and eth0. Your MDK router > has done its routing job if that's the case.
1. started both tcpdump I see the regular activity of usb0 and eth0 2. Pinged usb0 from the pda. Saw the request and reply on usb0 3. Pinged eth0 from pda. Saw the request and reply on usb0 but nothing on eth0. It looks like usb0 is answering instead of eth0 06:01:20.613156 192.168.1.100 > 192.168.0.3: icmp: echo request (DF) 06:01:20.613198 192.168.0.3 > 192.168.1.100: icmp: echo reply There was nothing on eth0. 3. Pinged the router from pda but did not get through. Nothing on eth0 and only the request on usb0: 06:05:24.926697 192.168.1.100 > 192.168.0.1: icmp: echo request (DF) 06:05:25.926478 arp who-has 192.168.1.1 tell 192.168.1.100 06:05:25.926506 arp reply 192.168.1.1 is-at xx:xx:x:xx:xx:xx 06:05:25.928440 192.168.1.100 > 192.168.0.1: icmp: echo request (DF) 06:05:26.926273 192.168.1.100 > 192.168.0.1: icmp: echo request (DF) wobo -- Public GnuPG key available at http://www.wolf-b.de/misc
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