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Document publishing a UDP port

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Signed-off-by: Misty Stanley-Jones <misty@docker.com>
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Misty Stanley-Jones 2016-11-28 15:31:43 -08:00
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docs/reference/commandline/service_create.md
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@ -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 the service running on the node. For more information refer to
[Use swarm mode routing mesh](https://docs.docker.com/engine/swarm/ingress/). [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 ### Create services using templates
You can use templates for some flags of `service create`, using the syntax You can use templates for some flags of `service create`, using the syntax