Hi Gavin,

we are seeing a similar message in a setup where we have multiple
distinct subnets configured on our default gateway (a phyiscal switch).
If ovn then sends a packet from an ip in one of the subnets to an ip in
another of these subnets it will send it to the default gateway which in
turn will forward it directly.
The default gateway also seems to send this ICMP Redirect that you are
seeing as well.
It seems like there is no handling in ovn for such packets.

However this message (at least for us) does not impact functionality in
any way, since the default gateway will continue to forwards packets.

Regards
Felix

On Wed, Sep 06, 2023 at 09:52:53AM -0700, Gavin McKee via discuss wrote:
> FYI
>
> We are running
> ovs-vsctl (Open vSwitch) 2.17.6
> ovn 22.09.2
>
> On Wed, 6 Sept 2023 at 09:43, Gavin McKee <gavmcke...@googlemail.com> wrote:
>
> > Hi,
> >
> > Can anyone tell me why I see the following log message (Invalid argument)
> > on packet?
> >
> > 2023-09-06T16:31:35.771Z|00002|dpif(handler14)|WARN|system@ovs-system:
> > execute pop_vlan,ct(zone=713,nat),recirc(0x9c) failed (Invalid argument) on
> > packet
> > icmp,dl_vlan=120,dl_vlan_pcp=0,vlan_tci1=0x0000,dl_src=9c:05:91:22:ec:fd,dl_dst=fe:5c:f5:1a:96:4b,nw_src=Z.Z.Z.Z,nw_dst=X.X.X.X,nw_tos=0,nw_ecn=0,nw_ttl=48,nw_frag=no,icmp_type=5,icmp_code=1
> > icmp_csum:daf4
> >
> > Thanks
> >
> > Gav
> >

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> https://mail.openvswitch.org/mailman/listinfo/ovs-discuss

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