Extra DHCP options (extra-dhcp-opt)

The DHCP options extension allows adding DHCP options that are associated to a Neutron port. They are tagged such that they can be associated from the hosts file to designate a specific network interface and port. The DHCP tag scheme used to associate options to the host files is the port_id (UUID - in the form of 8-4-4-4-12 for a total of 36 characters), these associate options to a Neutron port and its network. The Dynamic Host Configuration Protocol (DHCP) provides a framework for passing configuration information to hosts on a TCP/IP network. Configuration parameters and other information are carried in tagged data items that are stored in the ‘options’ field of the DHCP message.

You can specify a DHCP options when defining or updating a port by specifying the extra_dhcp_opts tag and providing its options as name value pairs, such as, opt_name=’bootfile-name’, opt_value=’pxelinux.0’.

Concepts

The extra-dhcp-opt extension is an attribute extension which adds the following set of attributes to the port resource:

  • extra-dhcp-opt:opt_name - Specified the DHCP option that this is defined as mapped to this port resource. Examples are bootfile-name, server-ip-address, tftp-server, etc..
  • extra-dhcp-opt:opt_value - Identifies the value associated with the opt_name. These are handled in opt_name, opt_value pairs only. value_opt can be any text string depending upon the name.

The actual semantics of extra-dhcp-opt attributes depend on the name of the dhcp option being used that defines the vendor extension to DHCP. For example reference RFC: http://tools.ietf.org/html/rfc2132, contains specific detail on BOOTP Vendor Extensions.

List ports

GET /ports

Lists ports with attributes.

Normal response Code: 200 OK

Error response Codes: 401 Unauthorized

This operation returns all the ports defined in Neutron that to which this user has access.

Example List ports with extra_dhcp_opts: JSON response

{
  "ports": [
  {
    "status": "DOWN",
    "binding:host_id": null,
    "name": "",
    "allowed_address_pairs": [],
    "admin_state_up": true,
    "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
    "tenant_id": "7ea98790cd854fb5a82ef3d41e5c156b",
    "extra_dhcp_opts": [{"opt_value": "testfile.1", "opt_name": "bootfile-name"}, {"opt_value": "123.123.123.45", "opt_name": "server-ip-address"}, {"opt_value": "123.123.123.123", "opt_name": "tftp-server"}],
    "binding:vif_type": "ovs",
    "device_owner": "",
    "binding:capabilities": {"port_filter": true},
    "mac_address": "fa:16:3e:52:92:3a",
    "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.228"}],
    "id": "3c0c7a37-690a-43a8-8088-5d4c2c7f8484",
    "security_groups": ["9bf6f19a-ba4a-470f-b8ce-28c9ad66556c"],
    "device_id": ""
  },
  {
    "status": "ACTIVE",
    "binding:host_id": null,
    "name": "",
    "allowed_address_pairs": [],
    "admin_state_up": true,
    "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
    "tenant_id": "7ea98790cd854fb5a82ef3d41e5c156b",
    "extra_dhcp_opts": [],
    "binding:vif_type": "ovs",
    "device_owner": "compute:probe",
    "binding:capabilities": {"port_filter": true},
    "mac_address": "fa:16:3e:49:56:07",
    "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.227"}],
    "id": "5212d40a-c2f5-4a5d-ad18-694658047654",
    "security_groups": ["9bf6f19a-ba4a-470f-b8ce-28c9ad66556c"],
    "device_id": "zvm2"
  }
  ]
}

Show port details

GET /ports/``port_id``

Shows details about a specified port, including extra-dhcp-opt attributes.

Normal response Code: 200 OK

Error response Code: 401 Unauthorized, 404 Not Found

This operation returns, for the port specified in the request URI, its port attributes, including the extra_dhcp_opts attributes.

Example Show port details with extra-dhcp-opt attributes: JSON response

{
    "port":
    {
        "status": "DOWN",
        "binding:host_id": null,
        "name": "",
        "allowed_address_pairs": [],
        "admin_state_up": true,
        "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
        "tenant_id": "7ea98790cd854fb5a82ef3d41e5c156b",
        "extra_dhcp_opts": [
            {"opt_value": "testfile.1","opt_name": "bootfile-name"},
            {"opt_value": "123.123.123.123", "opt_name": "tftp-server"},
            {"opt_value": "123.123.123.45", "opt_name": "server-ip-address"}
        ],
        "binding:vif_type": "ovs",
        "device_owner": "",
        "binding:capabilities": {"port_filter": true},
        "mac_address": "fa:16:3e:52:92:3a",
        "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.228"}],
        "id": "3c0c7a37-690a-43a8-8088-5d4c2c7f8484",
        "security_groups": ["9bf6f19a-ba4a-470f-b8ce-28c9ad66556c"],
        "device_id": ""
     }
}

Create port

POST /ports

Creates a port and explicitly specifies attributes with the extra-dhcp-opt extension attributes.

Normal response Code: 200 OK

Error response Code: 401 Unauthorized.

This operation returns, for the port specified in the request URI, its port attributes, including the extra_dhcp_opts attributes.

Example Create port with extra-dhcp-opt attributes: JSON request

{
    "port":
    {
        "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
        "extra_dhcp_opts": [
            {"opt_value": "pxelinux.0", "opt_name": "bootfile-name"},
            {"opt_value": "123.123.123.123", "opt_name": "tftp-server"},
            {"opt_value": "123.123.123.45", "opt_name": "server-ip-address"}
        ],
        "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.230"}],
        "admin_state_up": true
    }
}

Example Create port with extra-dhcp-opt attributes: JSON response

{
    "port":
    {
        "status": "DOWN",
        "binding:host_id": null,
        "name": "",
        "allowed_address_pairs": [],
        "admin_state_up": true,
        "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
        "tenant_id": "7ea98790cd854fb5a82ef3d41e5c156b",
        "extra_dhcp_opts": [
            {"opt_value": "123.123.123.123", "opt_name": "tftp-server"},
            {"opt_value": "pxelinux.0", "opt_name": "bootfile-name"},
            {"opt_value": "123.123.123.45", "opt_name": "server-ip-address"}
        ],
        "binding:vif_type": "ovs",
        "device_owner": "",
        "binding:capabilities": {"port_filter": true},
        "mac_address": "fa:16:3e:43:3c:b7",
        "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.230"}],
        "id": "055d27c0-0194-4782-be45-275ff2c95c61",
        "security_groups": ["9bf6f19a-ba4a-470f-b8ce-28c9ad66556c"],
        "device_id": ""
    }
}

Update port

PUT /ports/``port_id``

Updates attributes for a port, including extra_dhcp_opts extension attributes.

Normal response Code: 200 OK

Error response Code: 401 Unauthorized.

This operation allow for the updating of attributes for the port specified in the request URI, its port attributes, including the extra_dhcp_opts attributes.

Example Update port with extra-dhcp-opt attributes: JSON request

{
    "port":
    {
        "extra_dhcp_opts": [{"opt_value": "testfile.1", "opt_name": "bootfile-name"}]
     }
}

Example Update port with extra-dhcp-opt attributes: JSON response

{
    "port":
    {
        "status": "DOWN",
        "binding:host_id": null,
        "name": "",
        "allowed_address_pairs": [],
        "admin_state_up": true,
        "network_id": "87733bcc-8144-41b1-bb6b-d011d7a5168e",
        "tenant_id": "7ea98790cd854fb5a82ef3d41e5c156b",
        "extra_dhcp_opts":
        [
            {"opt_value": "123.123.123.123", "opt_name": "tftp-server"},
            {"opt_value": "testfile.1", "opt_name": "bootfile-name"},
            {"opt_value": "123.123.123.45", "opt_name": "server-ip-address"}
        ],
        "binding:vif_type": "ovs",
        "device_owner": "",
        "binding:capabilities": {"port_filter": true},
        "mac_address": "fa:16:3e:43:3c:b7",
        "fixed_ips": [{"subnet_id": "99a8aea3-b9da-409d-a5e5-f45338ceb4d3", "ip_address": "172.24.4.230"}],
        "id": "055d27c0-0194-4782-be45-275ff2c95c61",
        "security_groups": ["9bf6f19a-ba4a-470f-b8ce-28c9ad66556c"],
        "device_id": ""
    }
}

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