Strange kernel messages?

Kevin O'Connor kevin at ziptek-technologies.co.uk
Tue Aug 10 12:51:29 BST 2004


>-----Original Message-----
>From: freebsd-users-admin at uk.freebsd.org [mailto:freebsd-users-
>admin at uk.freebsd.org] On Behalf Of Grant
>Sent: 10 August 2004 12:22
>To: Pete French
>Cc: freebsd-users at uk.freebsd.org
>Subject: Re: Strange kernel messages?
>
>Pete French wrote:
>
>>>Got a few freebsd servers and i have noticed quite alot of these
>>>messages on the console and in the logs.
>>>
>>>arp: 10.0.0.100 moved from 00:c0:4f:26:a8:83 to 00:08:c7:3b:67:93 on fxp0
>>>arp: 10.0.0.100 moved from 00:08:c7:3b:67:93 to 00:c0:4f:26:a8:83 on fxp0
>>>arp: 10.0.0.100 moved from 00:c0:4f:26:a8:83 to 00:08:c7:3b:67:93 on fxp0
>>>
>>>
>>
>>This is puzzling from your setup. It is implying that both the cards
>>00:c0:4f:26:a8:83 and 00:08:c7:3b:67:93 have IP address 10.0.0.100
>>
>>But you describe the system like this:
>>
>>
>>
>>>The ip 10.0.0.100 is a proxy/gateway running clarkconnect with dual
>>>network cards one on 10.0.0.100 and one 192.168.254.100
>>>
>>>
>>
>>If thats true then the 10.0.0.100 should always be on the same ether
>>address. I wouldnt just ignore these if I were you, I would go and check
>>what is going on with that card.
>>
>>-bat.
>>
>>
>>
>Hey,
>
>The card in the proxy/gateway with ip 10.0.0.100/255.0.0.0 is: Intel
>Corp. 82557/8/9 [Ethernet Pro 100]
>The second card with ip 192.168.254.100/255.255.255.0 is: 3Com
>Corporation 3c905B 100BaseTX [Cyclone]
>
><ifconfig output>
>eth0      Link encap:Ethernet  HWaddr 00:08:C7:3B:67:93
>          inet addr:192.168.254.100  Bcast:192.168.254.255
>Mask:255.255.255.0
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:5228683 errors:2 dropped:0 overruns:0 frame:2
>          TX packets:3953717 errors:17 dropped:0 overruns:0 carrier:17
>          collisions:52185 txqueuelen:100
>          RX bytes:2679248839 (2555.1 Mb)  TX bytes:319930805 (305.1 Mb)
>          Interrupt:11 Base address:0xdcc0 Memory:fa000000-fa000038
>
>eth1      Link encap:Ethernet  HWaddr 00:C0:4F:26:A8:83
>          inet addr:10.0.0.100  Bcast:10.255.255.255  Mask:255.0.0.0
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:4138799 errors:2 dropped:0 overruns:0 frame:4
>          TX packets:5619034 errors:0 dropped:0 overruns:0 carrier:15
>          collisions:176994 txqueuelen:100
>          RX bytes:344435555 (328.4 Mb)  TX bytes:2810030644 (2679.8 Mb)
>          Interrupt:12 Base address:0xdc00
><end of ifconfig output>
>
> From the ifconfig output it shows both cards with only one address
>each, plus i allways thought you cant have move than one card using the
>same IP as it would conflict ?
>
>Any more ideas on where this problems might lay?
>
>Thanks again
>Grant.

It's not a fault, there is no problem. In the words of the Hitchhikers Guide
to the Galaxy "Don't Panic"  requests for arp are going through your hub to
a different network and being answered through the NAT gateway via the
internal route, hence the change of MAC address. Do a search on
http://www.google.co.uk/bsd for arp console messages, you'll find your not
alone :) The only worry is the fact that the solution does not seem to
appear. 
I don't know who's active in this group any more but if Joe is still about
what's the chance of getting an faq page(s) together on the server to help
people out with common problems like this. I'll even volunteer to do the
network ones. I know a search of the old posts is another way of doing it
but faq pages are more user friendly.
Regards
Kevin    





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