I have a CCR1036-8G-2S+ installed at the main Italian Internet Exchange (MIX).
RouterOS is 6.38.5.
Routers does basically: BGP (2 FRT + some BGP peers), OSPF, NAT.
Recently, MIX support contacted me because of undesired traffic seen on their IX switches.
Actually, it seems that some packets (unicast UDP+TCP) are directed through the IX port (the wrong one).
For example:
Internet Exchange switch is connected to eth1 port (via VLAN).
Carrier 1 is connected directly to port eth3
Carrier 2 is connected directly to port sfp-plus1
some packet from my router MAC directed to the MAC of one of my two carriers is transmitted from the Mikrotik to the IX port, where I cannot see that MAC (by arp).
On my ARP TABLE I can see the destination MAC of the router of my two carriers correctly associated to the port eth3 and sfp-plus1.
On port eth3 I only see the MAC belonging to other peers communicating with IX switch.
Do you have any idea why some traffic is broadcasted from Mikrotik to the wrong port?
Thanks,
Massimo