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:
Nov. 17, 2015
Filed:
Apr. 29, 2013
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Sridhar Pitchai, San Jose, CA (US);
Selvam Ramanathan, Sunnyvale, CA (US);
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
A method is implemented by a network device for a fast traffic recovery process for the virtual redundant router protocol (VRRP), where improved speed in a switchover from a master VRRP router to a backup VRRP router is obtained by synchronizing an address resolution protocol (ARP) cache between the master VRRP router and the backup VRRP router such that after the switchover the backup VRRP router functions as a new master VRRP router and does not need to relearn media access control (MAC) address to Internet Protocol (IP) mappings of hosts using the new master VRRP as a gateway. The process involves receiving an ARP entry on an interface of the network device and checking whether the network device is configured as the master VRRP router. The process then sends a gratuitous ARP message to the backup VRRP router in response to the network device being the master VRRP router.