Patent ID: 9379964
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. In a network component, a method for discovering a topology-transparent zone (TTZ), the method comprising: obtaining a TTZ identifier (ID) that is uniquely associated with the TTZ; identifying the network component as an edge node of the TTZ; identifying any links between the network component and any connected edge nodes of the TTZ as TTZ links; identifying a link connected to a second network component that is assigned the TTZ ID, wherein the second network component is an internal node of the TTZ; receiving a triggering command to initiate discovering the TTZ; generating a router information (RI) link-state advertisement (LSA) comprising a first field that indicates the TTZ ID in response to receiving the triggering command; and distributing the RI LSA using the link, wherein the TTZ is a zone within an area that is part of a network.