On Wed, May 21, 2014 at 7:20 AM, bodie <bodz...@openbsd.cz> wrote: > On 21.05.2014 12:50, bodie wrote: > >> On 21.05.2014 11:18, bodie wrote: >> >>> Hi, >>> >>> testing http://marc.info/?t=140024539000003&r=1&w=2 further and now I >>> hit issue with corporate WIFI. I can connect perfectly fine to 2 of >>> them provided with WPA2-PSK, either with regular ifconfig or with >>> wpa_supplicant from packages, but the thing is that my >>> /var/log/messages is flooded by these messages repeating like every >>> 3s: >>> >>> /bsd: arp info overwritten for GW_IP by MAC_1 on iwn0 >>> /bsd: arp info overwritten for GW_IP by MAC_2 on iwn0 >>> >>> arp -a shows only one MAC all the time and that's MAC_2 no matter if >>> I reboot or just reconnect to network. Info from inside about setup of >>> those APs is: >>> >>> There actually are 2 gateways having the same IP address GW_IP and >>> the mac addresses belong to them. They work as failover and also load >>> balacer. >>> >>> Not sure if it's because of that or because of ARP flooding in >>> /var/log/messages, but performance of those WiFi is quite strange like >>> ping replies over 20ms, a lot of web services doesn't work, takes >>> years to connect, some are running perfectly fine immediately and >>> such. >>> >>> So..... >>> >>> 1) Is there anything I can do with ARP messages in /var/log/messages? >>> Nothing in man arp and some sysctl switch I found only in FreeBSD >>> 2) Is there anything what can be tweaked from OpenBSD side to improve >>> general performance of WiFi connection or is it just either AP fix or >>> nothing? >>> >>> Thanks a lot >>> >> >> >> Still trying to get much more info, but that setup must be horrible. >> Trying arping results in: >> >> 30 packets sent, 60 received. Always doubled response with MAC_1 and MAC_2 >> >> When trying to ping some of the internal servers they all have >> 123.123.123.123 IP which is of course totally wrong. Same if tried >> with dig @GW_IP server_IP (as GW_IP is set as DNS by dhclient) >> >> So now not so sure if it's terrible AP setup or if it's something in >> ARP, dhclient, ieee80211 code in OpenBSD >> > > > Even more suspicious details: > > option dhcp-client-identifier 1:0:c2:c6:1c:af:ac in lease from dhclient, > but my MAC is 00:c2:c6:1c:af:ac. It got mangled or is it on purpose? > (investigating in the meantime of course :-)) >
that looks like dnsmasq identifier: It is allowed to use client identifiers (called client DUID in IPv6-land rather than hardware addresses to identify hosts by prefixing with 'id:'. Thus: --dhcp-host=id:01:02:03:04,..... refers to the host with client identifier 01:02:03:04. It is also allowed to specify the client ID as text, like this: --dhcp-host=id:clientidastext,..... > dhcp-server-identifier is IP of totally different subnet (10..) instead of > 192... of that AP/GW > -- --------------------------------------------------------------------------------------------------------------------- () ascii ribbon campaign - against html e-mail /\
