Hi Teaminx Have you already tried to send an icmp packet with zero payload to see with bpf_printk what happens before redirection? Il giorno ven 12 mag 2023 alle ore 21:17 team lnx <teamlnxi8@xxxxxxxxx> ha scritto: > > 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 > <jeffrey.b.shaw@xxxxxxxxx> 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. -- E' meglio coltivare GNU/Linux... tanto Windows si pianta da solo!!
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