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xen-users
RE: [Xen-users] dom0 lost packets.
brudas@xxxxxxxxxxx wrote:
>
> I try to get working together vlan and bonding both for dom0 and domU. I
> lost packets sent to dom0 while domU is OK.
>
> Nightly stats for dom0:
> 52879 packets transmitted, 45293 received, 14% packet loss, time 52879599ms
> rtt min/avg/max/mdev = 0.144/0.224/717.306/5.129 ms
>
> Nightly stats for domU:
> 52952 packets transmitted, 52952 received, 0% packet loss, time 52952554ms
> rtt min/avg/max/mdev = 0.157/0.209/3.166/0.048 ms
>
> Alsow I ping dom0 on production server (which have no bonding) in same
> rack and switch and see no packet drop. I see nothing strange in logs.
>
> System config:
> CentOS 5, Kernel 2.6.21, Xen 3.1.0
>
> # brctl show
> bridge name bridge id STP enabled interfaces
> br0 8000.001d0921ddee no bond0
> xenbrVLAN2000 8000.001d0921ddee no vif1.0
> bond0.2000
> # cat /proc/net/bonding/bond0
> Ethernet Channel Bonding Driver: v3.1.2 (January 20, 2007)
>
> Bonding Mode: fault-tolerance (active-backup)
> Primary Slave: None
> Currently Active Slave: eth0
> MII Status: up
> MII Polling Interval (ms): 80
> Up Delay (ms): 0
> Down Delay (ms): 0
>
> Slave Interface: eth0
> MII Status: up
> Link Failure Count: 0
> Permanent HW addr: 00:1d:09:21:dd:ee
>
> Slave Interface: eth1
> MII Status: up
> Link Failure Count: 0
> Permanent HW addr: 00:1d:09:21:dd:f0
>
> # cat /proc/net/vlan/config
> VLAN Dev name | VLAN ID
> Name-Type: VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD
> bond0.2000 | 2000 | bond0
>
> I'm sorry if anyone will get this message twice because I sent this
> message this mornining and still did not receive it back.
I heard on the list that disabling checksum offloading on the NIC
with ethtool helps clear it up. I believe it is on TX only and this
is of course on the physical interface in dom0.
-Ross
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