All of the available network packet behaviors, and their default option values.

Caveats:

• Behaviors are applied to a node’s network interface and affect all DB to DB node traffic
• :delay - Use :normal distribution of delays for more typical network behavior
• :loss - When used locally (not on a bridge or router), the loss is reported to the upper level protocols. This may cause TCP to resend and behave as if there was no loss.

See tc-netem(8).

Drop traffic from src to dest.

Takes a test and a grudge: a map of nodes to collections of nodes they should drop messages from, and makes those changes to the test’s network.

Removes packet loss and delays.

Introduces randomized packet loss

End all traffic drops and restores network to fast operation.

IPFilter rules

Default iptables (assumes we control everything).

Returns the network interface of the current host.

Does nothing.

Deletes root qdisc for given dev on current node.

Shapes network behavior, i.e. packet delay, loss, corruption, duplication, reordering, and rate for the given nodes.

Delays network packets with options:

  {:mean          ; (in ms)
  :variance       ; (in ms)
  :distribution}  ; (e.g. :normal)