gues host on arp table

[JustCyber]

Hi All
I have guest arp record for (192.168.15.100 VM) in proxmox server:

root@node1:~# arp -an
? (192.168.56.2) at d4:ca:6d:51:f8:0a [ether] on eth0
? (192.168.11.11) at 98:de:d0:1b:ac:2a [ether] on eth2
? (192.168.15.100) at 56:25:78:8a:a6:1f [ether] on eth0

But no route to this network:
root@node1:~# ip ro
default via 192.168.56.2 dev eth0 onlink
192.168.11.0/24 dev eth2 proto kernel scope link src 192.168.11.3
192.168.28.0/23 dev vmbr0 proto kernel scope link src 192.168.28.3
192.168.56.0/24 dev eth0 proto kernel scope link src 192.168.56.3

Why this host exist in arp table?

 

[guletz]

.... because your guests and server host use the same bridge(think like a switch).