On Fri, Nov 22, 2013 at 10:34:29AM +0900, Soyoung Jeong wrote:
> I have a bonded port in the OVS and in that port I found some packets lost
> in the OVS.
>
>
> [root@xcnc133 ~]# ovs-dpctl show xapi12
>
> lookups: frags:0, hit:12808235384, missed:2091274971, lost:15849
>
> port 0: xapi12 (internal)
>
> port 1: bond0 (internal)
>
> port 2: eth6
>
> port 3: eth4
>
> port 4: xapi14 (internal)
>
> port 5: xapi13 (internal)
>
> port 6: vif6.0
>
> port 7: vif169.0
>
> port 8: vif171.0
>
> port 9: vif12.0
>
> ...
>
>
> There is no traffic congestion and no resource starvation in dom0.
>
> So I investigated the bonding configuration and I think something's wrong
> about my bonding type.
>
>
> [root@xcnc137 log]# ovs-vsctl list port bond0
>
> _uuid : 14ac8377-fd93-48a6-95c6-b5884d6374cd
>
> bond_downdelay : 200
>
> bond_fake_iface : true
>
> *bond_mode : balance-slb*
>
> bond_updelay : 31000
>
> external_ids : {}
>
> fake_bridge : false
>
> interfaces : [cbfa82ff-fa2b-46ba-9f6c-1fada08cb3f1,
> de9e7b9e-4fd0-429d-bc14-ba0cbd57ad00]
>
> lacp : off
>
> mac : "a0:36:9f:14:18:a0"
>
> name : "bond0"
>
> other_config : {bond-detect-mode=carrier, bond-miimon-interval="100"}
>
> qos : []
>
> tag : []
>
> trunks : []
>
>
> I read the OVS manual for bonding type and it says:
>
> - balance-slb: Balances flows among slaves based on source MAC address
> and output VLAN, with periodic rebalancing as traffic patterns change.
> - active-backup: Assigns all flows to one slave, failing over to a
> backup slave when the active slave is disabled. This is the only bonding
> mode in which interfaces may be plugged into different upstream switches.
>
> According to the explanation, I think I have a wrong configuration in my
> OVS because I have different upstream switches for bonded port,,
>
> Do you think it could be the reason of some packet loss in OVS? Are those
> rules still effective in OVS 1.0.99?
I agree that you're using the wrong bonding type. It is not the source
of the lost packets. I wouldn't worry about the lost packets, because
they will happen occasionally, especially with such an old version of
OVS, and there is nothing you can do about it.
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