[ovs-discuss] Kernel cache flow match error with linux bond port as physical NIC GRO on

康敬亭 jingting at unitedstack.com
Fri Feb 26 07:06:42 UTC 2016

Hi guys:

I hava test environment as below:
ENV: Neutron + ovs(2.1.2) with linux bond(eth2,eth3), vm in compute node couldn't get ip from dhcp server.

I had flow [1] added  in br-int, and with eth2 and eth3 GRO on, the kernel cache flow was [3],and packets droped. But with eth2 and eth3 GRO off, the kernel cache flow was[2], and the packets will be forward with pop_vlan, and works OK.

In the failed situation, I found error msg in log as below:
 openvswitch: netlink: Flow modification message rejected, unmasked key does not match.

Anyone have idea about what wrong about ovs does not works with the linux bond?
OVS can't get field of vlan to match for packets from linux bond port with gro on?


[1]  cookie=0x0, duration=1383.630s, table=0, n_packets=237, n_bytes=68899, idle_age=3, priority=3,in_port=37,dl_vlan=2001 actions=mod_vlan_vid:1,NORMAL

[2]skb_priority(0),in_port(6),eth(src=fa:16:3e:09:58:b6,dst=fa:16:3e:32:b3:d5),eth_type(0x8100),vlan(vid=2001,pcp=0),encap(eth_type(0x0800),ipv4(src=,dst=,proto=17/0,tos=0xc0/0,ttl=64/0,frag=no/0xff)), packets:0, bytes:0, used:never, actions:pop_vlan,7

[3]skb_priority(0),in_port(6),eth(src=fa:16:3e:09:58:b6,dst=fa:16:3e:32:b3:d5),eth_type(0x8100),vlan(vid=2001/0xfff,pcp=0/0x0,cfi=1/1),encap(eth_type(0x0800),ipv4(src=,dst=,proto=17/0,tos=0xc0/0,ttl=64/0,frag=no/0xff)), packets:0, bytes:0, used:never, actions:drop
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