kea/doc/examples/kea4/multiple-options.json

# This is an example configuration file for the DHCPv4 server in Kea.
# It demonstrates simple configuration of the options for a subnet.

{ "Dhcp4":

{
# Kea is told to listen on ethX interface only.
  "interfaces-config": {
    "interfaces": [ "ethX" ]
  },

# We need to specify the the database used to store leases. As of
# September 2016, four database backends are supported: MySQL,
# PostgreSQL, Cassandra, and the in-memory database, Memfile.
# We'll use memfile  because it doesn't require any prior set up.
  "lease-database": {
    "type": "memfile"
  },

# Addresses will be assigned with a lifetime of 4000 seconds.
  "valid-lifetime": 4000,

# Renew and rebind timers are commented out. This implies that options
# 58 and 59 will not be sent to the client. In this case it is up to
# the client to pick the timer values according to RFC2131. Uncomment the
# timers to send these options to the client.
#  "renew-timer": 1000,
#  "rebind-timer": 2000,

// Defining a subnet. There are 3 DHCP options returned to the
// clients connected to this subnet. The first and third options are
// identified by the name. The third option is identified by the
// option code.
  "subnet4": [
    {
       "pools": [ { "pool":  "192.0.2.10 - 192.0.2.200" } ],
       "subnet": "192.0.2.0/24",
       "interface": "ethX",
       "option-data": [
         {
             "name": "domain-name-servers",
             "data": "192.0.2.1, 192.0.2.2"
         },
         {
             "name": "routers",
             "data": "192.0.2.1"
         },
         {
             // String options that have a comma in their values need to have
             // it escaped (i.e. each comma is predeced by two backslashes).
             // That's because commas are reserved for separating fields in
             // compound options. At the same time, we need to be conformant
             // with JSON spec, that does not allow "\,". Therefore the
             // slightly uncommon double backslashes notation is needed.
             "name": "boot-file-name",
             "data": "EST5EDT4\\,M3.2.0/02:00\\,M11.1.0/02:00"

             // Legal JSON escapes are \ followed by "\/bfnrt character
             // or \u followed by 4 hexa-decimal numbers (currently Kea
             // supports only \u0000 to \u00ff code points).
             // CSV processing translates '\\' into '\' and '\,' into ','
             // only so for instance '\x' is translated into '\x'. But
             // as it works on a JSON string value each of these '\'
             // characters must be doubled on JSON input.
         }
       ]
    } 
  ]
},

# The following configures logging. It assumes that messages with at least
# informational level (info, warn, error and fatal) should be logged to stdout.
"Logging": {
    "loggers": [
        {
            "name": "kea-dhcp4",
            "output_options": [
                {
                    "output": "stdout"
                }
            ],
            "severity": "INFO"
        }
    ]
}

}