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    Restart Counters Overview

    The MobileNext Broadband Gateway configured as a P-GW includes the P-GW restart counter (IE) in all GTPv2 messages that it sends to peers. The broadband gateway also receives the S-GW restart counters in GTPv2 messages from the S-GW.

    A broadband gateway configured as a P-GW increments the restart counter each time the P-GW is restarted. A broadband gateway receives the peer restart count from the recovery IE in the following GTP-C messages:

    • Echo request
    • Echo response
    • Bearer/PDP context create
    • Update messages

    A broadband gateway identifies a peer restart by comparing the locally stored peer restart event with the most recent restart count that is received from a peer. If the broadband gateway detects that a peer has restarted by comparing the previously received restart count with the currently received restart count, the broadband gateway deletes all the subscriber sessions associated with the down peer.

    Published: 2011-11-17