Cards seeming connect but unable to route traffic?

Drew Dowling drewhead at drewhead.org
Thu May 6 23:12:38 EDT 2004


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> Can you be more precise? I'll define "precise" by example
> how I'll describe packets on my (wired) network:

> -- BEGIN EXAMPLE ---
[snip]
> -- END EXAMPLE ---

> In other words, I don't try to describe what I see.
> I am actually showing others everything I see.

Certianly; espically for one who graciously offers help.

On host 192.168.2.1 (hostAP_wlan0)

# ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:36 errors:0 dropped:0 overruns:0 frame:0
          TX packets:36 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:6168 (6.0 Kb)  TX bytes:6168 (6.0 Kb)

wlan0     Link encap:Ethernet  HWaddr XX:XX:XX:XX:XX:XX  
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: xxxx::xxx:xxxx:xxxx:xxxx/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27670 errors:0 dropped:36 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:3137303 (2.9 Mb)
          Interrupt:11 Memory:d0b18000-d0b19000 

This is my simplification scheme... take all other interfaces out of the
picture and worry about them later once the wireless LAN is actually
functioning.

On host 192.168.2.3 (XP client)

C:\>ipconfig

Windows IP Configuration


Ethernet adapter {5A0E59AA-5C73-4D5E-8239-19A184C446E6}:

        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . . . . . . : 0.0.0.0
        Subnet Mask . . . . . . . . . . . : 0.0.0.0
        Default Gateway . . . . . . . . . :

Ethernet adapter Wireless Network Connection:

        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . . . . . . : 192.168.2.3
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.2.1


I do

C:\>ping -n 2 192.168.2.1

Pinging 192.168.2.1 with 32 bytes of data:

Request timed out.
Request timed out.

Ping statistics for 192.168.2.1:
    Packets: Sent = 2, Received = 0, Lost = 2 (100% loss),

on 192.168.2.1 (hostAP_wlan0) I see

# tcpdump -nlei wlan0 -s0 -vvv icmp or arp
tcpdump: listening on wlan0

0 packets received by filter
0 packets dropped by kernel

# tcpdump --help
tcpdump version 3.7.2
libpcap version 0.7.2

On host 192.168.2.3 (XP client) I have ethereal running and I see the APR
packets increment.  I havn't yet discovered a good way to dump text (only
had it < 24 hours).  

When I select the captured packets there are three boxes to look.  The
one named 'Address Resolution Protocol (request)' shows amoung other
things the source and targets IP and MAC.  The IPs are the ones for each
repective box.  The MAC of the source is correct.  The MAC of the target
is blank (or all 0s).

- -- 
     Drew Dowling               Drewhead          http://www.drewhead.org
 drewhead at drewhead.org    |                    |    WWW      / \ Alpha Phi Omega
Concord, North Carolina   |                    |  Nimat     /   \  Gamma Lambda
CLEMSON UNIVERSITY ALUMNI |                    | Apatschin /_____\
      TIGER BAND!         |      VGAP4 Hosting at http://vgap.drewhead.org
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