We are aware that multiple Seattle nodes ( SEA106KVM , SEA124KVM, SEA125KVM,SEA107KVM,SEARYZEN101, SEARYZEN100) are experiencing network connectivity issues.
We are currently looking into this node further.
UPDATE: This is now resolved. It was a network glitch specific to those nodes only, all VM's are now responsive again. If you are still experiencing any issues please open a support ticket and we'd be happy to assist.