[Kea-users] Problem during running DHCP server on VLAN interface

[Seyyed Hesam Ghasemi]

Is it possible to have a DHCP server on a VLAN interface? I tried but I
receive "interface doesn't exist" error. Is there any issue with my
configuration?


I have created a vlan interface with name "vlan10" and ID of 10 on physical
interface named "port2":

user:~# ip a
3: port2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state
DOWN group default qlen 1000
    link/ether 00:0c:29:3d:0e:3c brd ff:ff:ff:ff:ff:ff
    inet 2.2.2.1/24 scope global port2
       valid_lft forever preferred_lft forever
20: vlan10 at port2: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc
noqueue state LOWERLAYERDOWN group default qlen 1000
    link/ether 00:0c:29:3d:0e:3c brd ff:ff:ff:ff:ff:ff
    inet 1.1.1.1/24 scope global vlan10
       valid_lft forever preferred_lft forever

user:~# cat /proc/net/vlan/vlan10
vlan10  VID: 10  REORDER_HDR: 1  dev->priv_flags: 1021
         total frames received            0
          total bytes received            0
      Broadcast/Multicast Rcvd            0

      total frames transmitted            0
       total bytes transmitted            0
Device: port2
INGRESS priority mappings: 0:0  1:0  2:0  3:0  4:0  5:0  6:0 7:0
 EGRESS priority mappings:
root at nsg4-113-120:~#


I have tried the following json configs and all caused errors but none of
them works:

{
  "command": "config-test",
  "service": [
    "dhcp4"
  ],
  "arguments": {
    "Dhcp4": {
      "control-socket": {
        "socket-name": "/run/kea/socket-v4",
        "socket-type": "unix"
      },
      "interfaces-config": {
        "interfaces": [
          "port2.10"
        ]
      },
      "subnet4": [
        {
          "interface": "port2.10",
          "id": 10,
          "pools": [
            {
              "pool": "2.2.2.10-2.2.2.20"
            }
          ],
          "subnet": "2.2.2.0/24",
          "reservations": [],
          "valid-lifetime": 3600,
          "option-data": [
            {
              "data": "192.168.92.11",
              "code": 6,
              "space": "dhcp4"
            },
            {
              "data": "2.2.2.2",
              "code": 3,
              "space": "dhcp4"
            }
          ]
        }
      ],
      "client-classes": [],
      "option-data": []
    }
  }
}

Error: [ { "result": 1, "text": "Failed to select interface: interface
'port2.10' doesn't exist in the system (<wire>:0:609) (<wire>:0:608)"
} ]



{
  "command": "config-test",
  "service": [
    "dhcp4"
  ],
  "arguments": {
    "Dhcp4": {
      "control-socket": {
        "socket-name": "/run/kea/socket-v4",
        "socket-type": "unix"
      },
      "interfaces-config": {
        "interfaces": [
          "vlan01 at port2"
        ]
      },
      "subnet4": [
        {
          "interface": "vlan01 at port2",
          "id": 10,
          "pools": [
            {
              "pool": "2.2.2.10-2.2.2.20"
            }
          ],
          "subnet": "2.2.2.0/24",
          "reservations": [],
          "valid-lifetime": 3600,
          "option-data": [
            {
              "data": "192.168.92.11",
              "code": 6,
              "space": "dhcp4"
            },
            {
              "data": "2.2.2.2",
              "code": 3,
              "space": "dhcp4"
            }
          ]
        }
      ],
      "client-classes": [],
      "option-data": []
    }
  }
}

Error: [ { "result": 1, "text": "Failed to select interface: interface
'vlan01 at port2' doesn't exist in the system (<wire>:0:609)
(<wire>:0:608)" } ]
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