Invention Grant
- Patent Title: Stateful LISP subscription for overlapping subnetworks
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Application No.: US16715382Application Date: 2019-12-16
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Publication No.: US10999239B2Publication Date: 2021-05-04
- Inventor: Jesus Arango , Vina Ermagan , Johnson Leong , Sanjay Kumar Hooda
- Applicant: Cisco Technology, Inc.
- Applicant Address: US CA San Jose
- Assignee: Cisco Technology, Inc.
- Current Assignee: Cisco Technology, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Edell, Shapiro & Finnan, LLC
- Main IPC: H04L12/28
- IPC: H04L12/28 ; H04L29/12 ; H04L12/713 ; H04L12/26

Abstract:
A Location/Identifier Separation Protocol (LISP) mapping server, including: a network interface for communicating with a LISP-enabled network; a mapping database; a subscription database; and an overlapping subscription publication engine (OSPE) to: receive a first mapping of a first subnetwork to a first routing locator (RLOC); add the first mapping to the mapping database; receive from a first ingress tunnel router (ITR) a subscription request for an endpoint identifier (EID) within the first subnetwork; add to a first subscription entry for the first subnetwork in the subscription database a subscription for the first ITR; receive a second mapping of a second subnetwork to a second RLOC, wherein the second subnetwork overlaps the first subnetwork; add the second mapping to the mapping database; and copy at least part of the first subscription entry to a second subscription entry for the second subnetwork.
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