10:26 p.m.
The switch is connected to the internet via the school's switch. Currently (as well as
when I received the error messages last time) portfast is disabled for all ports, and STP
enabled for all ports except for the port connecting my switch to the school's.
On Aug 20, 2013, at 11:50 PM, Assaf Muller <amuller(a)redhat.com> wrote:
> 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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