Become a member of the Cisco Meraki Community today. Get answers from our community of experts in record time. Join now Technical Forums : Security & SD-WAN : Re: Disabling IPV6 on WAN. Much respect on the Team's thoughts and feelings on having the ability to enable or disable IPV6 on the WAN, but I can share the fact my personal issues with.. There is no way to disable the MX from receiving this address. If you believe it's causing an issue, contact your ISP and ask that they disable IPv6 on the link. Or you could try contacting Meraki support and see if they can disable it on the MX from the backend (not sure if this is possible or not)
I think some devices are seeing IPV6, trying to use IPV6 and timing out and falling back to IPV4. So users are complaining of slowness. We disable IPV6 on computers, but Iphones /Ipads are another story. And it's the apple crowd complaining of slowness,. RDNSS allows for the specification of IPv6 DNS servers so clients are able to look up IPv6 AAAA records without the need for an IPv4 intermediary. Once the servers are configured they will be advertised as part of the IPv6 Router Advertisement (RA) process. Configuration: Go to Security & SD-WAN > Configure > DHCP page.