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Patch 86251-08 For Rapier Series Switches SHOW IP ADVERTISE 59
Patch 86251-08 for Software Release 2.5.1
C613-10356-00 REV I
To create a polling instance, use the command:
ADD PING POLL=poll-id IPADDRESS={ipadd|ipv6add[%interface]}
[CRITICALINTERVAL=1..65535]
[DESCRIPTION=poll-description] [FAILCOUNT=1..100]
[LENGTH=4..1500] [NORMALINTERVAL=1..65535]
[SAMPLESIZE=1..100] [SIPADDRESS={ipadd|ipv6add}]
[TIMEOUT=1..30] [UPCOUNT=1..100]
•where poll-id is a number from 1 to 100, and identifies the polling
instance in the trigger commands and in other PING POLL commands.
The router or switch can poll up to 100 IP addresses at once.
The NORMALINTERVAL parameter specifies the time period between pings
when the device is reachable. By default, this is set to 30 seconds. The
CRITICALINTERVAL parameter specifies the time period between pings
when the router or switch has not received a reply to at least one ping and
when the device is unreachable. The default is 1 second. The
CRITICALINTERVAL enables the router or switch to quickly observe changes
in the state of the device, and should be set to a much lower value than the
NORMALINTERVAL.
The number of pings that the router or switch will examine to consider a
change in state is controlled by three parameters: FAILCOUNT, SAMPLESIZE,
and UPCOUNT. The FAILCOUNT is the number of pings that must be
unanswered for the router or switch to consider the device unreachable. The
default is 5. The SAMPLESIZE is the total number of pings within which the
FAILCOUNT number of pings must be unanswered. If SAMPLESIZE and
FAILCOUNT are the same, the unanswered pings must be consecutive. If
SAMPLESIZE is greater than FAILCOUNT, a device that does not always reply
to pings may be declared unreachable. By default, SAMPLESIZE is equal to
FAILCOUNT. The UPCOUNT is the number of consecutive pings that must be
answered for the router or switch to consider the device reachable again. The
default is 30. The interaction between these parameters is shown in Figure 3.
Figure 3: The interaction between states and parameters for ping polling.
UP: device reachable
DOWN: device unreachable
LINKDOWN trigger
activated
LINKUP trigger
activated
Substates of DOWN:
Down: Last ping failed
Poll frequency of CRITICALINTERVAL.
Critical Down: Last ping succeeded
Poll frequency of CRITICALINTERVAL.
after UPCOUNT
consecutive ping
replies
after FAILCOUNT
failed pings in
SAMPLESIZE window
Substates of UP:
Up: No failed pings in SAMPLESIZE window.
Poll frequency of NORMALINTERVAL.
Critical Up: At least 1 failed ping in SAMPLESIZE window.
Poll frequency of CRITICALINTERVAL.
ping-trigger2