cohydra.node.switch

Simulated network switch.

Classes

SwitchNode

This is representing a switch between other nodes.

class cohydra.node.switch.SwitchNode(name)

Bases: cohydra.node.base.Node

This is representing a switch between other nodes.

It uses ns-3 internals for routing.

bridge_device = None

The ns-3 internal device to route packages.

add_interface(interface, *args, **kwargs)

Add an interface to the node.

Warning: Do not call this function manually.

The functionality is handled by the network and channels.

Parameters

• interface (Interface) – The interface to add.

• name (str) – The name of the interface.

• prefix (str) – If no name is supplied, the function works out a name by appending a number to the prefix.

prepare(simulation)

Do all neccesary steps to prepare a node for the simulation.

Parameters

simulation (Simulation) – The simulation to prepare the node for.

wants_ip_stack()

Indicates whether a IP stack shall be installed onto the node.

Installing is handled by the Channel.

Returns

True indicates that a ns-3 IP stack shall be installed when preparing this node.

Return type

bool

execute_command(command, user=None)

Execute a command within the node.

Parameters

• command (str or list of str) – The command to execute.

• user (str) – If a user (name) is specified, the command is executed as this user. Warning: Not all nodes support this feature.

go_offline()

Disconnect the node from all channels.

go_online()

Connect the node back to all channels.

set_position(x, y, z=0)

Set the position of the node and updates the mobitlity model.

Parameters

• x (float) – The x-position.

• y (float) – The y-position.

• z (float) – The z-position.

Inheritance Diagramm