[ovs-dev] Windows OVS issue

[Alin Serdean]

Hello Wenying,

Trimming the email a bit.

Please see my comments inlined.

> Hi,
> 
> I am using OVS on Windows Server 2019 to provide container networking.
> OpenFlow is used to support both container and host networking, and OVS
> conntrack feature is also used on my setup. I find a lot of error or warning in
> ovs-vswitchd log, are there any thoughts about the errors?
> 
> e.g.,
> 2020-04-27T19:54:27.142Z|34004|odp_util(handler7)|WARN|Dropped 56
> log messages in last 59 seconds (most recently, 1 seconds ago) due to excessive
> rate 2020-04-27T19:54:27.142Z|34005|odp_util(handler7)|WARN|the flow
> key in error is:
> recirc_id(0),ct_state(0),ct_zone(0),ct_mark(0),ct_label(0),ct_tuple4(src=0.0.0.
> 0,dst=0.0.0.0,proto=0,tp_src=0,tp_dst=0),eth(src=68:4f:64:15:61:9a,dst=01:0
> 0:0c:cc:cc:cd),in_port(1),eth_type(0x05ff)
> 2020-04-27T19:55:27.535Z|34006|odp_util(handler7)|WARN|Dropped 56
> log messages in last 59 seconds (most recently, 2 seconds ago) due to excessive
> rate 2020-04-27T19:55:27.535Z|34007|odp_util(handler7)|WARN|invalid
> Ethertype 1535 in flow key 2020-04-
> 27T19:55:27.535Z|34008|odp_util(handler7)|WARN|Dropped 56 log
> messages in last 59 seconds (most recently, 2 seconds ago) due to excessive rate
> 2020-04-27T19:55:27.535Z|34009|odp_util(handler7)|WARN|the flow key in
> error is:
> recirc_id(0),ct_state(0),ct_zone(0),ct_mark(0),ct_label(0),ct_tuple4(src=0.0.0.
> 0,dst=0.0.0.0,proto=0,tp_src=0,tp_dst=0),eth(src=68:4f:64:15:61:9a,dst=01:0
> 0:0c:cc:cc:cd),in_port(1),eth_type(0x05ff)

[Alin Serdean] From what I can see those are packets which are missing a valid
Ethernet type. 

> 
> Except for above error logs, there are also some igmp warnings printed:
> 
...
> 2020-04-27T19:45:53.412Z|33960|dpif(handler7)|WARN|system at ovs-
> system: execute ct(zone=65520,nat),recirc(0x59b7) failed (Unknown error) on
> packet
> igmp,vlan_tci=0x0000,dl_src=00:15:5d:49:62:bd,dl_dst=01:00:5e:00:00:16,nw
> _src=172.16.6.17,nw_dst=224.0.0.22,nw_tos=0,nw_ecn=0,nw_ttl=1,igmp_ty
> pe=34,igmp_code=0
> with metadata skb_priority(0),skb_mark(0),in_port(5) mtu 0

[Alin Serdean] The windows datapath does not support IGMP, only ICMP, TCP,
UDP and minimal support for FTP.

> 
> Thanks,
> Wenying
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