HYDRO: A Hybrid Routing Protocol for Lossy and Low Power Networks
Problem Statement
Hydro Properties
Topology and Workload
Beyond the Protocol Survey
Limitations of HYDRO
Multicast Forwarding
Source Routing
ROLL Protocol-Survey Criteria
Multiple Controllers
Willingness and Node Attributes

Source Routing
Limitations
Packet overhead per packet, dependent on size of route
Large routes could dominate packet size, and require this state to be maintained at originating nodes
Reduces local agility
Silver Lining / Solutions
20-hops mentioned as max-depth in routing requirements docs
Multiple border routers bounds maximum length of a path
Hop-by-hop route install option can be used
Use hybrid landmark routing:
Source route broken up across a set of landmarks on a path