Method for determining round trip times for devices with ICMP echo disable
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United States of America Patent
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May 17, 2011
Grant Date -
N/A
app pub date -
Oct 18, 2004
filing date -
Oct 18, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for determining reachability of a device connected to a computer network by receiving from a requesting device at least one ICMP echo request, the at least one ICMP echo request having a destination address associated with a non-echoing device; in response to the received ICMP echo request, sending a ping to the non-echoing device; receiving from the non-echoing device a reply to the sent ping; issuing from a routing device a subsequent at least one ICMP echo request to the non-echoing device and determining that no response is received to the issued at least one ICMP echo request; receiving at least one subsequent ICMP echo request from a requesting device, the at least one subsequent having a destination address associated with the non-echoing device; and in response to the received reply to the additional ping, sending a proxy ICMP echo reply to the requesting device.
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