Alcatel-Lucent 7450 ESS Series Configuration Manual page 321

If the timeout value is larger than the interval value, multiple ICMP echo request messages may be
outstanding. Every ICMP echo request message transmitted to the far end host is tracked individually
according to the message identifier and sequence number.
With each consecutive attempt to send an ICMP echo request message, the timeout timer is loaded
with the timeout value. The timer decrements until:
Note that it is possible for a required ARP request to succeed or timeout after the message timeout
timer expires. In this case, the message request is unsuccessful.
If an ICMP echo reply message is not received prior to the timeout period for a given ICMP echo
request, that request is considered to be dropped and increments the consecutive message drop
counter for the priority event.
If an ICMP echo reply message with the same sequence number as an outstanding ICMP echo request
message is received prior to that message timing out, the request is considered successful. The
consecutive message drop counter is cleared and the request message no longer is outstanding.
If an ICMP Echo Reply message with a sequence number equal to an ICMP echo request sequence
number that had previously timed out is received, that reply is silently discarded while incrementing
the priority event reply discard counter.
The no form of the command reverts to the default value.
Default
1
Parameters
seconds — The number of seconds before an ICMP echo request message is timed out. Once a
7450 ESS OS Router Configuration Guide
• An internal error occurs preventing message sending (request unsuccessful).
• An internal error occurs preventing message reply receiving (request unsuccessful).
• A required route table entry does not exist to reach the IP address (request unsuccessful).
• A required ARP entry does not exist and ARP request timed out (request unsuccessful).
• A valid reply is received (request successful).
message is timed out, a reply with the same identifier and sequence number is discarded.
Values
1 — 60
VRRP
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