I think I got it
mike-hostap at tiedyenetworks.com
mike-hostap
Mon Apr 5 13:59:18 PDT 2004
So this weird problem seems to take a strange turn - the bridge
doesn't seem to have a complete table. For example, the station
'00:50:04:99:34:4e' (a server), one that the ap complains about, is on the
wired side and is the syslog server. If I dump the arp cache, we see:
# ip neigh show
x.x.x.x dev br0 lladdr 00:50:04:99:34:4e nud stale
x.x.x.x dev br0 lladdr 00:00:0c:92:5b:0c nud delay
Now, if I dumpo the bridge table, I see:
# brctl showmacs br0
port no mac addr is local? ageing timer
2 00:00:0c:92:5b:0c no 0.02
2 00:00:24:c1:e1:c0 yes 0.00
1 00:02:6f:06:37:ee yes 0.00
2 00:c0:b7:92:39:79 no 274.63
Entry #1 is the router on the wired side (and is in the arp cache)
Entry #2 is the ethernet interface
Entry #3 is the wireless interface
Entry #4 is an apc masterswitch power reboot bar
Note that #4 here is never referenced from the AP (it's on it's
own ip address range and is only connected to the same switch for
management conveience). Probbly it had to arp for something so that's why
it showed up here.
If I ping the server, and then dump the bridge table:
# brctl showmacs br0
port no mac addr is local? ageing timer
2 00:00:0c:92:5b:0c no 0.01
2 00:00:24:c1:e1:c0 yes 0.00
1 00:02:6f:06:37:ee yes 0.00
2 00:30:ab:24:c0:25 no 117.33
2 00:50:04:99:34:4e no 4.89
2 00:c0:b7:92:39:79 no 220.77
You can see that 00:50:04:99:34:4e magically showed up (finially),
and I'm not getting "drop packet to non-associated sta" anymore.
What triggered this was an observation in syslog about when the
messages start. This snippet shows the system quiescient and then all of a
sudden at 12:16:53, syslog on the AP emits a mark message, triggering a
cascade of messages. Since the last syslog message was +5 minutes ago, the
AP would have had to arp for the mac of the syslog box. Here's the log:
Apr 5 12:01:08 pppoe-lv syslog-ng[27495]: STATS: dropped 0
Apr 5 12:04:58 pppoe-lv sshd(pam_unix)[21480]: session closed for user
root
Apr 5 12:11:09 pppoe-lv syslog-ng[27495]: STATS: dropped 0
Apr 5 12:16:53 x.x.x.x -- MARK --
Apr 5 12:16:53 x.x.x.x klogd: AP: drop packet to non-associated STA
00:50:04:99:34:4e
Apr 5 12:16:53 x.x.x.x klogd: AP: drop packet to non-associated STA
00:50:04:99:34:4e
Apr 5 12:16:53 x.x.x.x klogd: AP: drop packet to non-associated STA
00:50:04:99:34:4e
+ millions of more where this came from....
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