NETEM

The following class provides access to the netem (Network Emulator) queuing discipline:

• NetemQDisc

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class NetemQDisc(qdisc_handle: Handle, parent_handle: Optional[Handle], *, delay: Optional[Union[float, int, Tuple]] = None, limit: Optional[int] = None, drop: Optional[Union[int, Tuple]] = None, duplicate: Optional[Union[int, Tuple]] = None, corrupt: Optional[Union[int, Tuple]] = None, reorder: Optional[Union[int, Tuple]] = None, gap: Optional[int] = None)

Bases: QDisc

This class provides access to the netem queueing discipline (see tc-netem(8)).

Parameters:

• qdisc_handle – Handle of this NetemQDisc

• parent_handle – Handle of the parent QDisc, or None if this is a root queuing discipline

• delay – delay (in ms) added to each outgoing packet; delay can be specified as a float, as an int, or as a tuple of the form (delay, [jitter, [correlation]])

• limit – packet limit

• drop – drop percentage; drop can be specified as an int, or as a tuple of the form (percent, [correlation])

• duplicate – duplicate percentage; duplicate can be specified as an int, or as a tuple of the form (percent, [correlation])

• corrupt – corrupt percentage; corrupt can be specified as an int, or as a tuple of the form (percent, [correlation])

• reorder – reorder percentage; reorder can be specified as an int, or as a tuple of the form (percent, [correlation])

• gap – packet distance when reordering

get_description() → str

Returns a string describing this NetemQDisc instance and its attributes

get_delay() → Optional[float]

Returns the delay added to outgoing packets (in ms)

get_delay_all() → Optional[Tuple]

Returns the delay parameters as the tuple (delay, [jitter, [correlation]])

get_limit() → Optional[int]

Returns the packet limit

get_loss() → Optional[int]

Returns the packet loss rate (percentage)

get_loss_all() → Optional[Tuple]

Returns the packet loss parameters as the tuple (percent, [correlation])

get_duplicate() → Optional[int]

Returns the duplicate packet percentage

get_duplicate_all() → Optional[Tuple]

Returns the packet duplication parameters as the tuple (percent, [correlation])

get_corrupt() → Optional[int]

Returns the corrupted packet percentage

get_corrupt_all() → Optional[int]

Returns the packet corruption parameters as the tuple (percent, [correlation])

dump(outfile: TextIO, level=0, qclass_map: Optional[Mapping[Handle, QClass]] = None)

Recursively dump this Qdisc to outfile.

The qclass_map, if present, is used to determine the destination QClass objects of traffic filters.

get_config() → QDiscConfig

Returns the QDiscConfig where this QDisc/QClass has been instantiated, or None if not instantiated.

get_handle() → Handle

Returns the QDisc/QClass handle

get_interface() → Optional[str]

Returns the interface where this QDisc/QClass has been instantiated, or None if the QDisc/QClass is not instantiated.

get_parent_handle() → Optional[Handle]

Returns the handle of the parent of this QDisc/QClass

get_reorder() → Optional[int]

Returns the reordered packet percentage

get_stats() → Optional[QStats]

Returns queuing stats.

is_default() → bool

Returns True if this QDisc is the default qdisc used by the kernel.

static is_ingress() → bool

Returns True if this QDisc is the ingress qdisc

is_root() → bool

Returns True if this is a root QDisc

get_reorder_all() → Optional[int]

Returns the packet reordering parameters as the tuple (percent, [correlation])

get_gap() → Optional[int]

Returns the gap (in packets) when reordering

qdisc_creation_args() → List[str]

Returns the arguments expected by tc(8) to create a netem qdisc