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**To update a virtual router**
The following ``update-virtual-router`` example uses a JSON input file to update a virtual router listener port. ::
aws appmesh update-virtual-router \
--cli-input-json file://update-virtual-router.json
Contents of ``update-virtual-router.json``::
{
"meshName": "app1",
"spec": {
"listeners": [
{
"portMapping": {
"port": 8080,
"protocol": "http"
}
}
]
},
"virtualRouterName": "vrServiceB"
}
Output::
{
"virtualRouter": {
"meshName": "app1",
"metadata": {
"arn": "arn:aws:appmesh:us-east-1:123456789012:mesh/app1/virtualRouter/vrServiceB",
"createdAt": 1563810546.59,
"lastUpdatedAt": 1563819431.352,
"uid": "a1b2c3d4-5678-90ab-cdef-11111EXAMPLE",
"version": 2
},
"spec": {
"listeners": [
{
"portMapping": {
"port": 8080,
"protocol": "http"
}
}
]
},
"status": {
"status": "ACTIVE"
},
"virtualRouterName": "vrServiceB"
}
}
For more information, see `Virtual Routers <https://docs.aws.amazon.com/app-mesh/latest/userguide/virtual_routers.html>`__ in the *AWS App Mesh User Guide*.