I think I see a problem in the implementation of bonding when
recirculation is available. Are you able to try out a patch? If so,
try the following. It is not a good way to solve the issue, but it
should illustrate whether recirculation is the problem.
diff --git a/ofproto/bond.c b/ofproto/bond.c
index f87cdba7908f..bb6a80411de5 100644
--- a/ofproto/bond.c
+++ b/ofproto/bond.c
@@ -927,7 +928,7 @@ bond_recirculation_account(struct bond *bond)
static bool
bond_may_recirc(const struct bond *bond)
{
- return bond->balance == BM_TCP && bond->recirc_id;
+ return bond->balance == BM_TCP && bond->recirc_id && false;
}
static void
On Fri, Oct 05, 2018 at 04:45:21AM +0000, Arun Navasivasakthivelsamy wrote:
> Also, ofproto/trace is suggesting that the packet will be hashed to a slave
> (instead of just to the active port) with lacp-fallback-ab option.
>
> This is with active-backup bond mode:
>
>
> [root@frankfurter02-4 ~]# ovs-appctl ofproto/trace br0
> in_port=6,dl_dst=28:99:3a:08:7a:cf
>
> Bridge: br0
>
> Flow:
> in_port=6,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=28:99:3a:08:7a:cf,dl_type=0x0000
>
>
> Rule: table=0 cookie=0 priority=0
>
> OpenFlow actions=NORMAL
>
> forwarding to learned port
>
>
> Final flow: unchanged
>
> Megaflow:
> recirc_id=0,in_port=6,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=28:99:3a:08:7a:cf,dl_type=0x0000
>
> Datapath actions: 5
>
>
> This is with balance-tcp with lacp-fallback-ab mode (LACP is not negotiated):
>
>
> [root@frankfurter02-4 ~]# ovs-appctl ofproto/trace br0
> in_port=6,dl_dst=28:99:3a:08:7a:cf
>
> Bridge: br0
>
> Flow:
> in_port=6,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=28:99:3a:08:7a:cf,dl_type=0x0000
>
>
> Rule: table=0 cookie=0 priority=0
>
> OpenFlow actions=NORMAL
>
> forwarding to learned port
>
>
> Final flow: unchanged
>
> Megaflow:
> recirc_id=0,in_port=6,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=28:99:3a:08:7a:cf,dl_type=0x0000
>
> Datapath actions: hash(hash_l4(0)),recirc(0x1)
>
> From: Arunkumar Navasiva
> <[email protected]<mailto:[email protected]>>
> Date: Thursday, October 4, 2018 at 4:18 PM
> To: "[email protected]<mailto:[email protected]>"
> <[email protected]<mailto:[email protected]>>
> Subject: Issue with OVS lacp-fallback-ab option
>
> Hello folks,
>
> We’re seeing an issue with lacp-fallback-ab option on ovs 2.5/2.6/2.8. It
> looks like when LACP is not enabled on the TOR switch ports, OVS on the
> centos server is not falling back cleanly to active-backup, and continues to
> send some portions of the traffic through the backup interface (we’ve seen
> this occur with various TOR vendor switches). Please see the attached
> screenshot which shows that some traffic still hashes to backup interface. We
> looked at the TOR forwarding table, and MAC addresses of VMs running on this
> server flaps between the two corresponding TOR switch ports of the bond . I’m
> still in the early stages of debugging this, but wanted to reach out to you
> to see if this is already a known issue? If not, any help on how to debug
> this further will be helpful.
>
>
> Thanks
> -Arun
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