On Wed, Nov 15, 2023 at 12:42:46PM +0100, Luca Di Gregorio wrote:
> # uname -a
> OpenBSD XXXXX.my.domain 7.4 GENERIC#0 amd64
>
> # ifconfig vxlan0 tunnel SOURCE_IP DEST_IP:8472 vnetid 5
> # ifconfig vxlan0 inet 192.168.5.1/30
> # ifconfig vxlan0 up
>
> # ifconfig vxlan0: I can't see the dest UDP port 8472 anywhere
> vxlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> lladdr fe:e1:ba:d9:e4:0b
> index 18 llprio 3
> encap: vnetid 5 parent none txprio 0 rxprio outer
> groups: vxlan
> tunnel: inet SOURCE_IP --> DEST_IP ttl 1 nodf
> Addresses (max cache: 100, timeout: 240):
> inet 192.168.5.1 netmask 0xfffffffc broadcast 192.168.5.3
>
> # ping 192.168.5.2
>
> In tcpdump, I see that arp packets are sent to UDP port 4789, not 8472:
> SOURCE_IP.4789 > DEST_IP.4789: VXLAN vni 5: arp who-has 192.168.5.2 tell
> 192.168.5.1 [ttl 1]
>
> Is this a bug?
It helps to read the vxlan(4) manpage, specifcially the paragraph abouts ports.
-Otto
