All Cisco Meraki networking devices are capable of passing IPv6 traffic, limited to the per-product specifics outlined below.
MR Access Points
MR 27.X firmware has an essential IPv6 Support that is limited to the following:
Ability to pass clients' IPv6 traffic in bridge mode
Ability to receive an IPv6 uplink address via SLAAC and connect to the Meraki dashboard
IPv6 support in ping traceroute Meraki dashboard tools.
Please see the details here.
MR 28.X and newer firmware versions added the new IPv6 features. Please refer to IPv6 Support on MR Access Points for full details on supported IPv6 functionality
MX Security Appliance and Teleworker Gateways
Cisco Meraki security appliances can pass IPv6 traffic in Routed (NAT), as well as pass-through mode. Please see the IPv6 Support on MX Security & SD-WAN Platforms KB for full details on supported functionality.
Cisco Meraki Switches can pass IPv6 traffic, as well as report information on clients using IPv6. Switch clients' IPv6 address and IPv6 address (link local) can be added as columns on the clients usage page.
Note: IPv4 is still required for Meraki management traffic to/from the cloud.
IPv6 ACLs are supported in MS firmware versions 10.0 and newer. Prior to MS 10.0, IPv4 only ACLs were configured on the Switch > IPv4 ACL page. IPv4 and IPv6 access lists are now configured under Switch > Configure > ACL. For more information, reference the Configuring ACLs and Switch ACL Operation articles.
Note: MS22/42/220/320 do not support IPv6 Access Lists at this time.