@@ -474,6 +474,35 @@ accessible at the target port on every node regardless if there is a task for

 the service running on the node. For more information refer to

 [Use swarm mode routing mesh](https://docs.docker.com/engine/swarm/ingress/).

+### Publish a port for TCP only or UCP only

+

+By default, when you publish a port, it is a TCP port. You can

+specifically publish a UDP port instead of or in addition to a TCP port. When

+you publish both TCP and UDP ports, Docker 1.12.2 and earlier require you to

+add the suffix `/tcp` for TCP ports. Otherwise it is optional.

+

+#### TCP only

+

+The following two commands are equivalent.

+

+```bash

+$ docker service create --name dns-cache -p 53:53 dns-cache

+

+$ docker service create --name dns-cache -p 53:53/tcp dns-cache

+```

+

+#### TCP and UDP

+

+```bash

+$ docker service create --name dns-cache -p 53:53/tcp -p 53:53/udp dns-cache

+```

+

+#### UDP only

+

+```bash

+$ docker service create --name dns-cache -p 53:53/udp dns-cache

+```

+

 ### Create services using templates

 You can use templates for some flags of `service create`, using the syntax