According to this guide I setup two servers.
Now these two servers can't ping each other, this is
arp -n result:
# arp -n Address HWtype HWaddress Flags Mask Iface x.x.x.129 ether xx:xx:xx:xx:xx:xx C br0 x.x.x.21 (incomplete) br0 x.x.x.138 (incomplete) br0
I can't ping x.x.x.21
Note: according to that guide br0 is default interface and there is no MAC Address Defined in it.
So How can I fix it? Thanks