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Overview:
Feature F-1675 Ethernet Link Redundancy via Smart-Probing enhances the IMG’s ability to initiate a switchover due to a failure in the IMG’s network. Currently the IMG employs a link based Ethernet Redundancy scheme. In the current scheme, the IMG would initiate a switch-over such as from interface Data 0 to Data 1 located on the rear of the IMG. With the addition of this feature the IMG can be configured to employ a probe-based detection scheme. In this scheme, the IMG would ‘probe’ a set of pre-configured endpoints (send an ARP request packet). The endpoints would then reply with a Gratuitous ARP packet. These packets inform the IMG that the endpoints are still ‘alive’. If the IMG sends out an ARP Request Packet and does not receive a Gratuitous ARP in return it will continue to send ARP Requests until the pre-configured number of requests is met. If at that time no Gratuitous ARP’s are sent back then the IMG will initiate a 'switchover’ to its ‘Hot Standby’ Port (Data 1 in this case). If the switchover solves the problem, then the IMG will continue processing calls on the new ‘switched-over’ port. However, if the issue is not solved, the IMG would continue to switch back and forth between Data 0 and Data 1 (ping pong effect) until the issue in the network is solved. The feature is enabled through ClientView and can be enabled on any of the network interfaces (CTRL, DATA, SIGNALING) located on the rear of the IMG.
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