Here is some tcpdumps as well, for reference there is a client connected to em1 which is sending the ARP and DHCP request packets. dhcpd is listening on vether0.
switch0: 15:09:28.708823 arp who-has 8.8.8.8 tell 169.254.10.62 15:09:29.574297 0.0.0.0.68 > 255.255.255.255.67: xid:0x1e787469 \ secs:46 [|bootp] [tos 0x10] 15:09:29.574536 0.0.0.0.68 > 255.255.255.255.67: xid:0x1e787469 \ secs:46 [|bootp] [tos 0x10] 15:09:29.574557 0.0.0.0.68 > 255.255.255.255.67: xid:0x1e787469 \ secs:46 [|bootp] [tos 0x10] 15:09:31.672393 arp who-has 8.8.4.4 tell 169.254.10.62 vether0: 15:09:28.708794 arp who-has 8.8.8.8 tell 169.254.10.62 15:09:29.574547 0.0.0.0.68 > 255.255.255.255.67: xid:0x1e787469 \ secs:46 [|bootp] [tos 0x10] 15:09:29.574787 10.0.0.1.67 > 10.0.0.33.68: xid:0x1e787469 \ secs:46 Y:10.0.0.33 S:10.0.0.1 [|bootp ] [tos 0x10] 15:09:31.672628 arp who-has 8.8.4.4 tell 169.254.10.62 em1: 15:09:12.676542 arp who-has 8.8.4.4 tell 169.254.10.62 15:09:13.467594 0.0.0.0.68 > 255.255.255.255.67: xid:0x1e787469 \ secs:30 [|bootp] [tos 0x10] 15:09:13.700573 arp who-has 8.8.4.4 tell 169.254.10.62 I just realized I grabbed the wrong chunk of the em1 log (it has the 30 second poll instead of the 46) but otherwise it is identical. The same packet appears 3 times on switch0 (which has vether0, em1 and em2 -- em2 doesn't have an active carrier and no tcpdump was done but I suspect that packet would show up there). The response from vether0 doesn't appear on switch0 or em1 however. John On Fri, Nov 6, 2020 at 3:21 PM John McGuigan <j...@upperbound.ca> wrote: > > After reading through the switch section of the ifconfig manpage I > changed the line in /etc/hostname.switch0 from: > > add vether0 > > to: > > addlocal vether0 > > Unfortunately, I'm still having the same issue, I can see ARP and DHCP > packets from the client computer on em1, vether0 and switch0, and can > see the ARP-REPLY and DHCP-REPLY packets on vether0 but they > never show up on vether0 or switch0. I also tried: > > sysctl net.inet.ip.forwarding=1 > > In case there was an issue forwarding between interfaces but no luck. > > Also tested this on the Nov 3rd 6.8-current snapshot with the same > results. > > Does anyone recognize this issue, packet replies not being forwarded > from the vether0 to physical adapter on a switch(4)? > > For reference, this behavior doesn't happen if I use a bridge(4) with > the same ports and hostname.if except for the addlocal vs add > I mentioned earlier. > > If someone wouldn't mind replicating this on their hardware (I've > tested this on two APU2s) it would definitely be appreciated. > > Thanks, > > John
