Re: XDP redirect - ping fail

Yes, IFACE1 has a route(static) to IFACE3 and ping succeeds.
Ping fails to IFACE4 from IFACE1, Do I need NAT and does XDP have support ?


On Thu, May 4, 2023 at 11:05 AM Shaw, Jeffrey B
<[email protected]> wrote:
>
> On 5/4/2023 10:38 AM, team lnx wrote:
> > Hello,
> >
> > I see a ping not working in below topology with xdp redirect
> >
> >
> > IFACE1 <--------->   IFACE2      IFACE3    <------------------> IFACE4
> >
> > IFACE2 and IFACE3 are on same host machine
> >
> > IFACE1 and IFACE2 are  on static ip
> > IFACE3 and IFACE4 are on dynamic ip, IFACE4 runs dhcp server
> >
> > steps
> > 1. assign static ip between IFACE1 and IFACE2 (ex: 172.168.2.x)
> > 2. dynamic ip between IFACE3 and IFACE4 (ex: 192.168.2.x)
> > 3. Run xdp redirect on IFACE2 and IFACE3
> > 4. start ping from IFACE1 to IFACE4
>
> Does IFACE1 have a route to 192.168.2.x and is the next hop resolved?
> You can use `tcpdump` on IFACE1 and IFACE4 to see what packets are sent
> and received.