adept technology GRouter4, Руководство пользователя

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Fig.3.8: Twin Mode Setup Page
HeartBeat Time : is sets the time period in milliseconds between cycles of the twin mode
monitoring packets. e active member of the redundant pair or active twin , sends out two round
trip monitoring packets during each HeartBeat period that test both the 709.1 and IP interfaces of
both routers. e default is 1000 ms. Increasing the HeartBeat Time increases the fail over latency
time. Decreasing it increases network traffic and load on the router. A practical lower limit is 100
ms.
Timeout Cushion : is sets the time period in milliseconds of latency cushion for the time out
for failure detection of the monitoring packets. In other words if aer a time equal to HeartBeat
Time + Cushion, both monitoring packets are not detected by a router then a monitoring failure
has been deemed to have occurred. e routers then go to an active diagnostic mode. e
cushion should always be less than the HeartBeat Time but greater than the expected latency due
to propagation delays. e default is 200 ms.
AutoSync Time : is sets the time period in milliseconds between automatic synchronization
attempts from the twin to the inactive twin. e default is 5000 ms.
Diagnostic Retrie s: is sets the number of retries that the active diagnostic interrogation
request/response message will use. A diagnostic is sent out from each interface (709 and IP)
whenever a monitoring failure occurs. If the interrogation packet fails aer
Diagnostic Retries
number of retries then a fault of the associated network interface will have been deemed to have
occurred. is will generate an alarm. e default is two retries. If spurious faults occur it may be
because
Diagnostic Retries is too low and the diagnostic responses are getting lost due to
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