Cards seeming connect but unable to route traffic?

[Denis Vlasenko]

On Thursday 06 May 2004 15:31, Drew Dowling wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
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> > > protocol when I ping.  The Address Resolution has good sender info, but
> > > a literal 00:00:00:00:00 MAC address for the target.  Any ideas of
> > > where to go from here?
> >
> > Clarify :: From XP Box you see sender info (HostAP_wlan0) with
> > 00:00:00:00:00 MAC?
>
> Yes.  Sender info (going to HospAP_wlan0) with the IP I tried to ping.
> The IP shows what I pinged, the MAC address is 00:00:00:00:00

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

-- BEGIN EXAMPLE ---

On host 1.1.1.2 I do:

# ping -c2 1.1.1.1
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=0.517 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=64 time=0.370 ms

--- 1.1.1.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 0.370/0.443/0.517/0.076 ms

On host 1.1.1.1 I see:

# tcpdump -nleiifi -s0 -vvv icmp or arp
tcpdump: listening on ifi, link-type EN10MB (Ethernet), capture size 65535 bytes
23:27:29.423242 00:50:fc:b1:49:ce > ff:ff:ff:ff:ff:ff, ethertype ARP, length 60: arp who-has 1.1.1.1 tell 1.1.1.2
23:27:29.423298 00:50:fc:b0:e1:17 > 00:50:fc:b1:49:ce, ethertype ARP, length 42: arp reply 1.1.1.1 is-at 00:50:fc:b0:e1:17
23:27:29.423405 00:50:fc:b1:49:ce > 00:50:fc:b0:e1:17, ethertype IPv4, length 98: IP (tos 0x0, ttl  64, id 0, offset 0, flags [DF], length: 84) 1.1.1.2 > 1.1.1.1: icmp 64: echo request seq 1
23:27:29.423536 00:50:fc:b0:e1:17 > 00:50:fc:b1:49:ce, ethertype IPv4, length 98: IP (tos 0x0, ttl  64, id 61348, offset 0, flags [none], length: 84) 1.1.1.1 > 1.1.1.2: icmp 64: echo reply seq 1
23:27:30.423655 00:50:fc:b1:49:ce > 00:50:fc:b0:e1:17, ethertype IPv4, length 98: IP (tos 0x0, ttl  64, id 1, offset 0, flags [DF], length: 84) 1.1.1.2 > 1.1.1.1: icmp 64: echo request seq 2
23:27:30.423813 00:50:fc:b0:e1:17 > 00:50:fc:b1:49:ce, ethertype IPv4, length 98: IP (tos 0x0, ttl  64, id 61349, offset 0, flags [none], length: 84) 1.1.1.1 > 1.1.1.2: icmp 64: echo reply seq 2

6 packets captured
6 packets received by filter
0 packets dropped by kernel

# tcpdump --help
tcpdump version 3.8
libpcap version 0.8

# ip a l ifi
2: ifi: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:50:fc:b0:e1:17 brd ff:ff:ff:ff:ff:ff
    inet 1.1.1.1/24 brd 1.1.1.255 scope global ifi

-- END EXAMPLE ---

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