The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2026
Filed:
Apr. 23, 2024
Cisco Technology, Inc., San Jose, CA (US);
Satish Kumar Mahadevan, San Ramon, CA (US);
Balaji Sundararajan, Fremont, CA (US);
Basavaraju Halappa, San Jose, CA (US);
Sourav Sen, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques for ensuring symmetric forwarding between disparate networks are described herein. In active/standby hub architectures, hub nodes may be configured to convert a preference order (e.g., indicating a preferred hub node), specified by an endpoint on a wide-area network (WAN)-side of a network, into a local-area network (LAN)-side-routing-metric that is distributed to datacenter router(s) on the LAN-side of the network. When an active hub node loses connection to all of the available routing controllers, the active hub may automatically manipulate the LAN-side-routing-metric to make the metric worse than the standby hub to indicate that the routes being advertised by the active hub are 'stale,' such that the datacenter routers prefer the standby hub, avoiding traffic asymmetry as a result of the lost connection.