How to update link delay & routing tables during runtime about p4-utils HOT 1 OPEN

Hi!

1. There is ways to change the delay during runtime, but there is not a direct API in mininet or p4-utils. You will have to write the code yourself. I will give you some pointers: Here you can find how network conditions are added to links: https://github.com/mininet/mininet/blob/master/mininet/link.py#L231. If you inspect this class you will see how mininet/p4-utils modify the interface delay. Basically it uses linux tc netem qdisc. You will need to find way to modify the interface netem memory on your own.

2. Yes also provide a runtime controller to add rules dynamically. You can find many examples at the p4-learning repository, for example this one shows how to fill routing tables from a python controller: https://github.com/nsg-ethz/p4-learning/tree/master/exercises/08-Simple_Routing/thrift

from p4-utils.