Segment routing: Less state, less capability. IP/MPLS RSVP-TE: More state, more capability

The Important Segment routing (for MPLS) supports explicit routes with LESS STATE than IP/MPLS RSVP-TE, but WITHOUT* bandwidth reservation signaling IP/MPLS with RSVP-TE supports explicit routes, with MORE STATE than Segment Routing (for MPLS), but WITH bandwidth reservation signaling Segment routing: Less state, less capability. IP/MPLS RSVP-TE: More state, more capability. *Not withstanding “https://tools.ietf.org/html/draft-ietf-spring-resource-aware-segments-00” and management interfaces, which will be discussed below….

Book Review: Navigating Network Complexity

From a small number of hosts that are unreachable to large Internet outages, complexity sneaks up and bites network operators, sometimes at the most unexpected and undesirable times. While many mistakes in networks are manual configuration errors, the events of August 30th 2020, served to remind, that automated processes can sometimes propagate a mistake, fast,…

You cannot eliminate complexity for the SAME capability & certainty

The common saying in networking “you cannot eliminate complexity, you can only move it around” are words to live by. Providing insight into the combinatorial complexity in engineering tradeoffs. I find it useful to think about the issue in a slightly modified way “You cannot eliminate complexity for the SAME capability (& certainty)”. Information theory points…