Middle Atlantic RLNK-410R-IEC-NS handleiding

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Middle Atlantic

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Handleiding

UNDERSTANDING AN AUTOPING CONFIGURATION

Page 55

Measuring Modem/Router Start-Up Time

When configuring AutoPing, it’s important to know the start-up time of the modem/router. The start-up

time is the amount of time between when the modem/router is powered-up until it starts routing traffic

to the Internet.

NOTE: If your Internet connection is down from your Internet Service Provider (ISP) or your AutoPing

settings don’t take your modem/router’s start-up time into account, the result is referred to as Cyclic

Rebooting, where your RackLink continuously turns the controlled outlet on and off.

To measure your modem/router start-up time:

1. Leave your modem/router unplugged/powered off.

2. Open a command prompt and Ping an address on the internet using the –t option (Ping

continuously) as follows:

ping –t www.google.com

You should see replies indicating “Request timed out”.

3. Start a stopwatch while plugging in the modem/router’s power cable.

Once you see “Reply from…” as a response, stop the stopwatch.

This is your start-up time for the modem/router.

NOTE: It may be beneficial to add a few seconds to the start-up time just to be safe. For our

example, we will assume the modem/router boots up in about 2 minutes.

Calculating Frequency, Failures, and Cycles

Before configuring AutoPing in your RackLink device, it’s important to understand the relationship

between Frequency, Failures, and Cycles. It is good practice to keep the default values for Frequency

and Failures (30 and 3, respectively) and adjust your outlet recovery cycle time (Cycle-Time) to equal

your measured recovery time from “Measuring Modem/Router Start-Up Time” on page 55, plus at

least 1 frequency.

In our example, we set Frequency to 30 seconds, Failures to 3, which results in your Internet

connection being down for 90 seconds in order to trigger an AutoPing recovery. Finally, we set an

outlet Cycle-Time of 150 seconds (a modem/router reboot of 120 seconds + a Frequency of 30

seconds).

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