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Availability monitoring with SNMP

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Hello Experts,

 

Good Morning!!

 

Client is having 100 devices in their environment and they are not ready to allow or enable ICMP for 40 devices. In such case how NNMi will react for Node Up/Down in absence of ICMP. Will SNMP help us in that scenario and there is no need of ICMP generally too..?

 

Thanks.

Praveen M

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Re: Availability monitoring with SNMP

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Hello Praveen M,

 

you don't need ICMP for NodeDown as SNMP is the preferred method.

 

HTH and kind regards

 

Allessandro

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Re: Availability monitoring with SNMP

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Hello Praveen M,

 

you don't need ICMP for NodeDown as SNMP is the preferred method.

 

HTH and kind regards

 

Allessandro

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Re: Availability monitoring with SNMP

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Thank you Allessandro.. As per the deployment reference document, it is mentioned as

* The State Poller cannot monitor devices that are not configured to respond to SNMP requests. (However, if the device responds to SNMP, State Poller does not use ICMP.) - Does it mean that state poller if not uses ICMP then SNMP poll would assist In alerting for device or ip address up/down..?

Thanks

Praveen M

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Re: Availability monitoring with SNMP

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Hello Praveen M,

 

you can configure NNMi to use ICMP and/or SNMP for monitoring. ICMP can determine, if an IP address is not responding to ICMP requests (ping). SNMP uses SNMP requests to get the response from SNMP MIB variables as sysUptime of the SNMP agent on a device (primary method to check if the node is up). Other SNMP requests can check for the state of interfaces or power supplies/fans/chassis/cards/....

ICMP monitoring is very simple, but with SNMP NNMi does even more: to get the root cause NNMi checks the interface state of connected neighbour devices (as discovered and stored in the NNMI database) and correlates the different symptoms to one root cause.

Different scenarios are discussed in the White Paper "Causal Analysis" of version 10.10.

 

HTH and kind regards

 

Allessandro

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