Hi,

We are setting up DFM for just the "Unresponsive" events initially with email-notify being sent for both Active and Clear states.

As per the documentation DFM uses a combination of SNMP and ICMP polling to check the device availability with ICMP interval being dependent on the "Reachability" interval defined in the polling parameters.

However I have also found out that ICMP polling interval is also dependent on the "Retry" parameter ?

E.g. With Reachability set to default of 240sec, the ICMP polling will be

Retry = 1, ICMP = 220

Retry = 2, ICMP = 200,

Retry = 3, ICMP = 180,

Retry = 4, ICMP = 160

Is there a particular formula that is used to calculate ICMP Polling Interval ?

Also the Retry interval is also effecting when the Active Event notification is sent.

E.g. Assuming the first Echo Request packet doesn't get a response then if

Retry = 1, 3 ICMP Packets are sent before the notification is sent

Retry = 2, 5 ICMP packets

Retry = 3, 7 ICMP packets

Retry = 4, 9 ICMP packets

All these ICMP retry packets are being sent with an approx. interval of 9-10 sec.

How can I customize the interval for these ICMP retry packets ?

Is it possible to control, when the Email Notification is sent after all the ICMP Retry packets result in failure?

E.g. Is this scenario possible ?

ICMP Polling Interval = 180Sec

1. Device is determined to be down

2. DFM waits for X amount of seconds

3. DFM tries ICMP polling again and if fails again then Sends the notification ?

Can this parameter help ?

++++++++++++++

#

# How long, in seconds, an event must remain active before the

# adapter sends a notification.

#

eventSmoothingInterval = 0

+++++++++++++++++++

This is from the NMSROOT\objects\smarts\conf\notifier\mail-notify.conf

file.

Thanks,

Naman