Hi,   I would like to seek to some solution with network deployement for Meraki. A couple weeks ago, i have deployed full scale of meraki MX, MS & MR with 2 different link . Link 1 is Dedicated Internet Access 100 Mbps Link 2 is pppoe connection 100 Mbps   I deployed 2 MX ( MX250) with warm spare setup as per below : Link 1 ( DIA ) connected to port internet at MX1 Link 2 (PPPOE) connected to port internet at MX2   Below the MX, I have deployed 2 units Meraki MS425 with stacked using QSFP cable with configurations below : Port 19 MX 1 connected to MS 1 port 5  Port 19 MX 2 connected to MS 2 port 3 From this switch, i distributed the connection to access switch using meraki MS225 48port. Total access switch that i have is 5 units Meraki MS225.   So from each MS425 there's 2 fiber cable connected to each MS225 performing LACP.  MS 1  connected to port 49  MS 2  connected to port 50  performing link aggregation and this is happen in each access switches.    My question, when do speed test, the lnternet showing that it is only 20 Mbps, top rate is 40 Mbps. and its getting worst ?. I have discussed with other engineer, some of them says that there's a looping inside.    I also have set the STP from the core swith as 0 -likely root. But the internet performance still not achieve as we expected.    Perhaps, anyone can advise me or having the similiar experience with this kind of issue.   Thank you.     ... View more