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How Solarwind calculates Response time and packet loss.

Hi All,

I am new to solarwind,infact this is my second day in solarwind.I just wanted to know how solarwind calculates Response time and Packet loss.Which OID it uses for this purpose.Also Could you please let me know how it calculates the packet drop report.I mean any mathematical calculation.

Please reply ,this is critical for us.

Regards,

N.Dubey

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neilmborilla

Same thing when you issue ping command on your command prompt (ICMP protocol)

sonu

Thanks for your information.

I just want to conform how it utilise the ICMP ping.Is there is any script for that or there is any OID from which it collects data.

I am interetsed in learning how it works in details.Like it will continously ping the device and save information some were and use that information for reporting.

Regards,

N.Dubey

GoldTipu

Node response time calculated by ICMP (Ping) packet and stores the information in DB calculating average basses on last 5 ping response from Node. ICMP doesn't use any OID since its not a SNMP request . Only OID value been pulled by SNMP .

Here is a good tool to monitor the ping response from Device. You can use it from Orion server and see what average you have this might be slightly different .

http://www.solarwinds.com/products/toolsets/Ping.aspx

Telnet is deferent protocol and response might be different depending on the device setup as well.

Also here is some info on how warning Status Works:
**************************************************
Node warning Interval:

When devices stop responding or are simply dropping ICMP (Ping) packings.
NPM will switch Node status from UP to WARNING.
If device does not respond within the Fast Polling Interval, The device Status is set as Down.

Fast polling interval is applied when a ping/snmp-query failed for the first time.

The default value for fast-polling is 120 seconds.

Fast Polling Interval is hard coded into the System,
and it does this every 10 seconds, for i.e. 120 seconds.

You can only change the DURATION of the Fast Polling,
by adjusting the setting in Advanced Settings, Node Warning Interval.
This changes the time period that Orion will Fast Poll until it marks the node down.

So if your Alert is to send an email if a Node goes Down,
it might have to be down for at least 2-3 minutes before Node is marked as down.
**************************************************

noobes

Hi Malik,

I have the engineers toolset and want to run the continuous ping tool on 5 nodes for an 8 hour period. Should I expect any problems with this would I generate a huge amount of data? Thanks @malik Haider

sean.martinez

The Standard Packet size of ICMP Packets on most ping you use in terminal or command prompt are about 20 bytes in size. Solarwinds adds text to the ICMP Packet (every Solarwinds Tool usually will have the packet information such as "Solarwinds <Product Name> <Some Version>" under the settings which you can change to add more of less data and a timeout of 2500ms). Most packet sizes Solarwinds uses are roughly 40 bytes, so taking 40 bytes polled every 10 seconds over 24 hours, each device would consume roughly 0.3456 Megabytes per day, jumping to 1 second 3.456 Megabytes per day.

You should not see any issues unless either latency or bandwidth becomes a problem.

noobes

Thanks Sean!