Hi,

We have installed 3 x CRS354-48P-4S+2Q+ (they are connected to a L3 Cisco Switch). What we are doing is using the CRS354-48P-4S+2Q+ for L2 for both our Data and VoIP (had cisco switch before).

All L3 connections are comming to the Switch into port 48

I have added 3 VLANs in the Mikrotik Switch ID 9, 16 and 18.
Member of port 9 are Port 1 and 48 (and all the SPF)
Member of port 16 and 18 are all ports.

In VLAN all ports (VLAN MODE) are in strick mode
Port 1, 48 (and all spf) are Only Tagged using port 9
Port 2 to 47 are VLAN Receive Any with default VLANID 16

All equipment do received their VLAN correctly (16 for Data and 18 for phone), but I keep losing phones/data every 30 sec or so. even in the Mikrotik SWOS on the top I see a red message saying Error: Lost Connection comming and going.

Did I forgot a setting somewhere?