Common Contracts

Link state agreement

Link State Agreement • March 9th, 2004

• Contract Type
  Link State Agreement
• Filed
  March 9th, 2004

Earlier notes2 proposed an agreement protocol (documented in P802.1aq clause 133) that ensures loop-free active topology(ies) without requiring that bridges cease forwarding frames after every topology change. This note proves that the forwarding rules guarantee loop-free link state operation for (a) simple shortest path destination-based unicast (b) hop- by-hop multipath unicast (c) spanning tree (unicast with possible flooding, and multicast)