Alcatel-Lucent 7750 SR-OS, Руководство по настройке

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VRRP
7750 SR OS Router Configuration Guide Page 381
padding-size
Syntax padding-size size
no padding-size
Context config>vrrp>priority-event>host-unreachable
Description
This command allows the operator to increase the size of IP packet by padding the PDU.
The no form of the command reverts to the default.
Default 0
Parameters size — Specifies amount of increase to to ICMP PDU.
Values 0 — 16384
timeout
Syntax timeout seconds
no timeout
Context config>vrrp vrrp-policy-id >priority-event>host-unreachable ip-addr
Description This command defines the time, in seconds, that must pass before considering the far-end IP host
unresponsive to an outstanding ICMP echo request message.
The timeout value is not directly related to the configured interval parameter. The timeout value
may be larger, equal, or smaller, relative to the interval value.
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:
• 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).
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.