While Meraki appliances have traditionally relied on UDP port 7351 for cloud communication and TCP ports 80 and 443 for backup communications, with MX 16 we are beginning a transition to using TCP port 443 as the primary means for cloud connectivity. In order to ensure proper connectivity to the Meraki cloud after this upgrade, please ensure that traffic using TCP port 443 between 209.206.48.0/20 is allowed through any firewalls that may be deployed upstream of your Meraki appliances.
HTTP proxy, which allows default management traffic from MX appliances to be sent through a proxy, is deprecated on MX 16 and higher firmware versions.
Legacy products notice
When configured for this version, Z1, MX60, MX60W, MX80, and MX90 devices will run MX 14.56.
Bug fixes
Corrected an issue in the NBAR heuristic classification engine that could occasionally lead to large numbers of misclassifications.
Resolved a very rare issue that could result in otherwise healthy MX appliances losing connection to the MX Dashboard.
Stability improvements for MX67(C,W), MX68(W,CW), MX75, and MX85 appliances.
Known issues
After making some configuration changes on MX84 appliances, a brief period of packet loss may occur. This will affect all MX84 appliances on all MX firmware versions
Due to MX 15 regressions, USB cellular connectivity may be less reliable on some modems
Due to an MX 15 regression, the management port on MX84 appliances does not provide access to the local status page
Client traffic will be dropped by MX65(W), MX67(C,W), and MX68(W,CW) appliances if 1) The client is connected to a LAN port with 802.1X authentication enabled and 2) The VLAN ID of the port is configured to 16, 32, 48, 64, 80, 96, 112, 128, 144, 160, 176, 192, 208, 224, or 240.
