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# AWS::AppMesh::Mesh MeshSpec
<a name="aws-properties-appmesh-mesh-meshspec"></a>

An object that represents the specification of a service mesh.

## Syntax
<a name="aws-properties-appmesh-mesh-meshspec-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-appmesh-mesh-meshspec-syntax.json"></a>

```
{
  "[EgressFilter](#cfn-appmesh-mesh-meshspec-egressfilter)" : EgressFilter,
  "[ServiceDiscovery](#cfn-appmesh-mesh-meshspec-servicediscovery)" : MeshServiceDiscovery
}
```

### YAML
<a name="aws-properties-appmesh-mesh-meshspec-syntax.yaml"></a>

```
  [EgressFilter](#cfn-appmesh-mesh-meshspec-egressfilter): 
    EgressFilter
  [ServiceDiscovery](#cfn-appmesh-mesh-meshspec-servicediscovery): 
    MeshServiceDiscovery
```

## Properties
<a name="aws-properties-appmesh-mesh-meshspec-properties"></a>

`EgressFilter`  <a name="cfn-appmesh-mesh-meshspec-egressfilter"></a>
The egress filter rules for the service mesh.  
*Required*: No  
*Type*: [EgressFilter](aws-properties-appmesh-mesh-egressfilter.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`ServiceDiscovery`  <a name="cfn-appmesh-mesh-meshspec-servicediscovery"></a>
An object that represents the service discovery information for a service mesh.  
*Required*: No  
*Type*: [MeshServiceDiscovery](aws-properties-appmesh-mesh-meshservicediscovery.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)