Good Afternoon my fellow Meraki gurus.
We have noticed a weird situation with several of our clients. Site to site is down for sites that have ATT as ISP. if we change the connection to Comcast or any other ISP the Tunnel comes online. ATT tunnel is down. is also blocking our monitoring agents to call back to our colo.
We have talked to ATT using each of the affected client's accounts and no Firewall rules or traffic blocks are being applied on the ATT side. we talked to Verizon on our colo and no traffic is being blocked on the receiving end either.
Again if I change ISP on client side (our agents and VPN tunnels start checking in) on ATT no joy
Tested MX firmware version 16.16, 17.7 and 17.8 same results