The traffic does not leave my machine ...
Here's my ifconfig if that helps;
0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:468 (468.0 b)
eth0 Link encap:Ethernet HWaddr 00:15:C5:5D:C0:BE
inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::215:c5ff:fe5d:c0be/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:176328 errors:0 dropped:0 overruns:0 frame:0
TX packets:301583 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:26003737 (24.7 MB) TX bytes:488759515 (466.1 MB)
eth1 Link encap:Ethernet HWaddr 00:15:C5:5D:C0:BF
inet addr:87.102.101.158 Bcast:87.102.101.255 Mask:255.255.255.0
inet6 addr: fe80::215:c5ff:fe5d:c0bf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:272976 errors:0 dropped:0 overruns:0 frame:0
TX packets:559429 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:17198305 (16.4 MB) TX bytes:249087754 (237.5 MB)
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:79887 errors:0 dropped:0 overruns:0 frame:0
TX packets:79887 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6587300 (6.2 MB) TX bytes:6587300 (6.2 MB)
peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:13260 errors:0 dropped:0 overruns:0 frame:0
TX packets:20341 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1038838 (1014.4 KB) TX bytes:5661953 (5.3 MB)
Base address:0xecc0 Memory:fe9e0000-fea00000
peth1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:846060 errors:0 dropped:0 overruns:0 frame:0
TX packets:577736 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:267309371 (254.9 MB) TX bytes:260521447 (248.4 MB)
Base address:0xdcc0 Memory:fe5e0000-fe600000
tun0 Link encap:UNSPEC HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.99.0.1 P-t-P:10.99.0.2 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:301583 errors:0 dropped:0 overruns:0 frame:0
TX packets:176329 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:488759515 (466.1 MB) TX bytes:26003807 (24.7 MB)
vif0.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:559429 errors:0 dropped:0 overruns:0 frame:0
TX packets:272977 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:249087754 (237.5 MB) TX bytes:17198375 (16.4 MB)
vif4.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:164166 errors:0 dropped:0 overruns:0 frame:0
TX packets:182474 errors:0 dropped:6 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:22467019 (21.4 MB) TX bytes:305137759 (291.0 MB)
vif4.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:7535 errors:0 dropped:0 overruns:0 frame:0
TX packets:276712 errors:0 dropped:2052 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:4698540 (4.4 MB) TX bytes:23528102 (22.4 MB)
vif5.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:99546 errors:0 dropped:0 overruns:0 frame:0
TX packets:108154 errors:0 dropped:9 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:13948995 (13.3 MB) TX bytes:178514052 (170.2 MB)
vif5.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:4779 errors:0 dropped:0 overruns:0 frame:0
TX packets:271874 errors:0 dropped:2778 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:2391054 (2.2 MB) TX bytes:21580528 (20.5 MB)
vif6.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:6701 errors:0 dropped:0 overruns:0 frame:0
TX packets:3462 errors:0 dropped:14 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:430729 (420.6 KB) TX bytes:657222 (641.8 KB)
vif6.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:806 errors:0 dropped:0 overruns:0 frame:0
TX packets:265698 errors:0 dropped:2098 overruns:0 carrier:0
collisions:0 txqueuelen:32
RX bytes:123889 (120.9 KB) TX bytes:19099185 (18.2 MB)
xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:98256 errors:0 dropped:0 overruns:0 frame:0
TX packets:183 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:13375927 (12.7 MB) TX bytes:7770 (7.5 KB)
xenbr1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:825898 errors:0 dropped:0 overruns:0 frame:0
TX packets:2447 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:249201663 (237.6 MB) TX bytes:102934 (100.5 KB)
--
Managing Director, Encryptec Limited
Tel: 0845 25 77033, Mob: 07853 305393, Int: 00 44 1443205756
Email: gareth@xxxxxxxxxxxxx
Statements made are at all times subject to Encryptec's Terms and Conditions of
Business, which are available upon request.
----- Original Message -----
From: "Matthew Crocker" <mcrocker@xxxxxxxxxxx>
To: "Gareth Bult" <gareth@xxxxxxxxxxxxx>
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Sent: Tuesday, January 8, 2008 12:24:23 AM (GMT) Europe/London
Subject: Re: Re; [Xen-users] Ethernet has Alzheimers
> Wait, it gets better, on 10.0.0.12;
>
> arp -d 10.0.0.1
>
> tcpdump shows;
>
> 23:14:14.014725 arp who-has 10.0.0.1 tell 10.0.0.10
> 23:14:14.014797 arp reply 10.0.0.1 is-at fe:ff:ff:ff:ff:ff
Look at the switch and fine out what port has FE:FF:FF:FF:FF:FF on it
and hit that machine in the head.
-Matt
> Eeeek!
>
> --
> Managing Director, Encryptec Limited
> Tel: 0845 25 77033, Mob: 07853 305393, Int: 00 44 1443205756
> Email: gareth@xxxxxxxxxxxxx
> Statements made are at all times subject to Encryptec's Terms and
> Conditions of Business, which are available upon request.
>
> ----- Original Message -----
> From: "Gareth Bult" <gareth@xxxxxxxxxxxxx>
> To: "Matthew Crocker" <mcrocker@xxxxxxxxxxx>
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Sent: Monday, January 7, 2008 11:11:04 PM (GMT) Europe/London
> Subject: Re: Re; [Xen-users] Ethernet has Alzheimers
>
> Ok, I've managed to pin it down and you are quite right - it's ARP.
>
> Now the question is, how do I fix it.
>
> here's what I have
>
> Dom0 :: 10.0.0.1
> DomU :: 10.0.0.12
>
> Both machines work fine for 40 mins .. then;
>
> DomU reports Dom0 unreachable.
> Sure enough ping 10.0.0.1 gives no response.
> However, ping 10.0.0.12 from Dom0 responds fine.
> A one-way ping!
>
> arp -na on Dom0 reports as expected.
> arp -na on the broken DomU shows;
> ? (10.0.0.1) at FE:FF:FF:FF:FF:FF [ether] on eth0
>
> It's picking up FE:EE ... instead of the desired MAC address ?!
>
> How can it do this ?!
>
> On Dom0:
> eth0 Link encap:Ethernet HWaddr 00:15:C5:5D:C0:BE
> inet addr:10.0.0.1 Bcast:10.0.0.255 Mask:255.255.255.0
> inet6 addr: fe80::215:c5ff:fe5d:c0be/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:205397 errors:0 dropped:0 overruns:0 frame:0
> TX packets:413848 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:41267633 (39.3 MB) TX bytes:95050228 (90.6 MB)
>
> On DomU:
> eth0 Link encap:Ethernet HWaddr 00:00:10:00:00:0C
> inet addr:10.0.0.12 Bcast:10.0.0.255 Mask:255.255.255.0
> inet6 addr: fe80::200:10ff:fe00:c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:6297 errors:0 dropped:0 overruns:0 frame:0
> TX packets:11662 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:1157351 (1.1 MB) TX bytes:907972 (886.6 KB)
>
> Help!
>
>
>
>
> --
> Managing Director, Encryptec Limited
> Tel: 0845 25 77033, Mob: 07853 305393, Int: 00 44 1443205756
> Email: gareth@xxxxxxxxxxxxx
> Statements made are at all times subject to Encryptec's Terms and
> Conditions of Business, which are available upon request.
>
> ----- Original Message -----
> From: "Matthew Crocker" <mcrocker@xxxxxxxxxxx>
> To: "Gareth Bult" <gareth@xxxxxxxxxxxxx>
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Sent: Monday, January 7, 2008 10:00:40 PM (GMT) Europe/London
> Subject: Re: Re; [Xen-users] Ethernet has Alzheimers
>
>>> Is the machine answering ARP replies?
>>
>> Honestly, I don't know .. the machine tends to lock up for other
>> reasons when it dies hence it's not easy to track ..
>>
>>> Does the upstream router have the IP & MAC in its ARP table?
>>> Does the upstream switch have the MAC in its mac-address-table?
>>> Assigned to the correct port?
>>
>>> Sounds to me like an ARP timeout problem.
>>
>> This occurs between DomU's and Dom0 in addition to external
>> addresses ... so I don't think it's linked to anything outside of
>> Xen .. I've experienced the same problem on 4 different machines,
>> all different HW config .. so again I think faulty HW is out.
>>
>> For what it's worth;
>>
>> I'm using Ubuntu Gutsy (7.10) with the stock Xen 3.1 kernel all on
>> AMD64 and Intel/Xeon machines all running 64 bit kernels and distros.
>>
>> All machines are using bridging with two physical ethernet ports.
>> All DomU's are running two matching virtual ports.
>> I'm using IPTABLES (firehol) fairly heavily for port filtering.
>
> Bridging is Layer2, IP is Layer 3, you are having a problem at layer
> 3 so you need to look to make sure your layer 2 stuff is working
> properly.
>
> If Xen is bridging only then you won't really have visibility into the
> Layer 3 problem from Dom0. You could look at the bridging config and
> see if it knows about the MAC address properly in the switch. At
> some point upstream from the Xen hardware you have another Layer 3
> device, most likely a router. You need to get into that router and
> see if it has the IP -> MAC entry in its ARP table. If it doesn't
> have it then there is your problem. Something is stopping the DomU
> from answering the ARP queries from the router. The route loses track
> of the MAC address and can no longer send Ethernet frames to your
> DomU. If your router does have the ARP entry then I would look into
> your switches and see if they are dropping the MAC address from their
> table.
>
>
>
>
>
>
> _______________________________________________
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>
>
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