We are experiencing issues with transmitting MDM push. Some are successfully transmitting, but the majority are failing. The following message occurred on the server:
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:430f:0:0:0:a:443
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:4303:0:0:0:b:443
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:430c:0:0:0:b:443
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:430b:0:0:0:a:443
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:4303:0:0:0:b:443
java.util.concurrent.ExecutionException: io.netty.channel.AbstractChannel$AnnotatedSocketException: Network is unreachable: api.push.apple.com/2620:149:208:4306:0:0:0:d:443
Apple system status was normal. Since some are successfully transmitting, we suspect that the issue may not be related to the network.