8:50 a.m.
The problem was also present when I just had one interface connected
to the switch, connected to the Internet.
How was the switch connected to the internet? Is it connected to other switches?
To solve the loop you can make sure that STP is enabled on all switches and to disable
portfast.
----- Original Message -----
From: "H. Haven Liu" <haven.liu(a)ucla.edu>
To: "Assaf Muller" <amuller(a)redhat.com>
Cc: Users(a)ovirt.org
Sent: Tuesday, August 20, 2013 6:09:09 PM
Subject: Re: [Users] received packet with own address as source address
Hello,
After I reinstalled the host, the problem seems to have disappeared. This is not to say
it's not going to come back, as it has done before.
I know the nodes were not receiving the error message *before* I installed VDSM (which
configured the bridge?), but I haven't tried uninstalling to see if the problem would
go away. The problem was also present when I just had one interface connected to the
switch, connected to the Internet.
If the problem is indeed a classic L2 loop, how do I go about resolving it? Is it due to
bridge (mis)configuration, or is it in the network switch settings? I have tried enabling
and disabling STP and portfast, which didn't seem to have any effect.
Thanks,
Haven
On Aug 20, 2013, at 12:26 AM, Assaf Muller <amuller(a)redhat.com> wrote:
Hello Mr. Liu,
Sounds like a classic L2 loop. Hosts getting their own packets then losing connectivity
for a few minutes while the switches restart.
Can you try to rule out this possibility?
For example:
If you uninstall the engine and VDSM from all hosts does this still happen?
Can you simplify the network topology and see if the issue persists?
----- Original Message -----
From: "H. Haven Liu" <haven.liu(a)ucla.edu>
To: Users(a)ovirt.org
Sent: Saturday, August 17, 2013 10:06:07 PM
Subject: [Users] received packet with own address as source address
Hello,
I have a oVirt installation with 6 CentOS 6.4 hosts. Some (not all) hosts are receiving
these error messages, at a frequency of once every other minute:
[root@vhost1 ~]# grep "source address" /var/log/messages | tail
Aug 17 11:19:20 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:21:24 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:23:29 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:25:34 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:27:39 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:29:44 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:31:49 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:33:54 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:35:59 vhost1 kernel: em1: received packet with own address as source address
Aug 17 11:38:04 vhost1 kernel: em1: received packet with own address as source address
These error messages are accompanied with loss of connectivity, with duration varies
between a few seconds to minutes. The loss of connectivity would start just before the
above error message.
I don't *think* it's hardware because the "received packet with own
address" error message would disappear from one of the hosts after a while. These
error messages are also present whether or not any VM is running on the particular host.
Here are some configurations:
[root@vhost1 ~]# ifconfig
em1 Link encap:Ethernet HWaddr aa:bb:cc:dd:ee:f1
inet6 addr: aaaa::bbbb:cccc:dddd:eee1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:37413202 errors:0 dropped:0 overruns:0 frame:0
TX packets:17822315 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:32444347931 (30.2 GiB) TX bytes:13715272213 (12.7 GiB)
Interrupt:16
em2 Link encap:Ethernet HWaddr aa:bb:cc:dd:ee:f2
inet6 addr: aaaa::bbbb:cccc:dddd:eee2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:21878 errors:0 dropped:0 overruns:0 frame:0
TX packets:526 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1598070 (1.5 MiB) TX bytes:40526 (39.5 KiB)
Interrupt:17
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:49 errors:0 dropped:0 overruns:0 frame:0
TX packets:49 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9236 (9.0 KiB) TX bytes:9236 (9.0 KiB)
ovirtmgmt Link encap:Ethernet HWaddr aa:bb:cc:dd:ee:f1
inet addr:xxx.xxx.xxx.xxx Bcast:xxx.xxx.xxx.yyy Mask:255.255.255.0
inet6 addr: aaaa::bbbb:cccc:dddd:eeee/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:22623881 errors:0 dropped:0 overruns:0 frame:0
TX packets:9990988 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:28427312067 (26.4 GiB) TX bytes:13112553784 (12.2 GiB)
private_lan Link encap:Ethernet HWaddr aa:bb:cc:dd:ee:f2
inet addr:10.0.1.12 Bcast:10.0.1.255 Mask:255.255.255.0
inet6 addr: aaaa::bbbb:cccc:dddd:eee2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19771 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:1080512 (1.0 MiB) TX bytes:468 (468.0 b)
[root@vhost1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-em1
DEVICE=em1
ONBOOT=yes
HWADDR=aa:bb:cc:dd:ee:f2
BRIDGE=ovirtmgmt
NM_CONTROLLED=no
UUID=c25b1ad1-9646-4126-9149-be5f68bae36c
DNS2=www.www.www.www
DNS1=www.www.www.www
HOSTNAME=vhost1.mydomain.com
MTU=1500
IPV6INIT=no
[root@vhost1 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ovirtmgmt
DEVICE=ovirtmgmt
ONBOOT=yes
TYPE=Bridge
DELAY=0
IPADDR=xxx.xxx.xxx.xxx
NETMASK=255.255.255.0
GATEWAY=xxx.xxx.xxx.1
BOOTPROTO=none
NM_CONTROLLED=no
UUID=c25b1ad1-9646-4126-9149-be5f68bae36c
DNS2=www.www.www.www
DNS1=www.www.www.www
HOSTNAME=vhost1.mydomain.com
MTU=1500
IPV6INIT=no
[root@vhost1 ~]#
Any help is appreciated.
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