Drop traffic from src to dest.

Removes packet loss and delays.

Introduces randomized packet loss

End all traffic drops and restores network to fast operation.

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)

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