METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR PRESERVING NETWORK BANDWIDTH DURING NETWORK ADDRESS TRANSLATION (NAT) DEVICE UNAVAILABILITY OR AFTER NAT DEVICE REBOOT

Abstract: a method for preserving network bandwidth during nat device unavailability or after a nat device reboot includes receiving, by a session initiation protocol (sip) proxy, messages from sip endpoints, determining, by the sip proxy, that at least some of the sip endpoints are located behind a nat device. the method further includes determining, by the sip proxy, that the nat device is potentially unavailable or has potentially rebooted, testing, by the sip proxy, reachability of at least some of the sip endpoints located behind the nat device and determining that the at least some of the sip endpoints are unreachable, classifying, by the sip proxy, all of the sip endpoints located behind the nat device as unreachable, and rejecting, by the sip proxy, sip messages directed towards the sip endpoints located behind the nat device.

Inventor(s): Lalit Grover, Vimal Chandra Tewari, Jayesh Shrimali

CPC Classification: H04L65/1073 (Registration or de-registration)

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