usage: check_snmp.py [-h] [-v VERSION] [-c COMMUNITY] [-r] [-f] [-b]
                     [--config [CONFIG]]
                     host [category [category ...]]

positional arguments:
  host                  The host to connect to.
  category              One or more of the categories from the configuration
                        separated by spaces.

optional arguments:
  -h, --help            show this help message and exit
  -v VERSION, --version VERSION
                        The SNMP version to use.
  -c COMMUNITY, --community COMMUNITY
                        The community string to use.
  -r, --respect         Respect properties marked as important when other
                        results contain errors.
  -f, --format          Include additional format like colors in the output.
  -b, --brief           Output brief information (only description and
                        combined status).
  --config [CONFIG]     The configuration file to load.

{
  "config": {
    "status-ok": [ "xxx", ... ]                  # status values that indicate OK. Values should be lower case.
    "status-warning": [ "xxx", ... ]             # status values that indicate WARNING. Values should be lower case.
    "status-critical": [ "xxx", ... ]            # status values that indicate CRITICAL. Values should be lower case.
    "global-list-bullet": "xxxx",                # bullet string prepended for each item in a category.
                                                 # E.g. each disk item returned. Default is "  - ".
    "global-oid-separator": "xxxx",              # string to separate each sub item in an oid entry.
                                                 # E.g. each piece of info of a disk. Default is ", ".
    "custom-mappings": {                         # (optional) custom logic to convert raw value to standard status values (ok, fail, etc.).
      "xxxxxxxx": { "xx": "ok", "xx": "fail" },
      ...
    },
    "custom-converters": {                       # (optional) custom python code applied to the oid result.
      "xxxxxxxx": "xxxxxxxxxxx{0}xxxxxxx",       # the code will be used in eval() and {0} refers to the raw oid result.
      ...
    }
  },
  "dell": {
    "mib_dir": "xxxxxxxxxxxxxxxxxxxxxxxx",       # do not change these unless you know what you are doing.
    "mib": "xxxxxxxxxxxxxxx",                    # do not change these unless you know what you are doing.
    "categories": {
      "xxxxxxxxx": {                             # category name can be any string.
                                                 # used in the command line for category selection.
        "description": "xxxxxxxxxxxxxxxxxx",
        "oids": [
          {
            "oid": "xxxxxxxxxxxxxxxx",
            "type": "status",                    # type can be "text", "status", or "custom".
            "prefix": "xxxxxxxxxxxx"             # (optional) used to annotate this oid and customize output.
            "suffix": "xxxxxxxxxxxx"             # (optional) used to annotate this oid and customize output.
            "mapping": "xxxxxxxxxxxx"            # (optional for non-custom type) specify custom mapping to use for this oid.
          },
          ...
          "list-bullet": "xxxx"                  # (optional) string to override the global list bullet.
          "oid-separator": "xxx",                # (optional) string to override the global oid separator.
        ],
        "important": true                        # (optional) true or false.
      },
      ...
    }
  },
  "hpe": {
    ...                                          # same structure as dell.
  }
}