FAQs on WAN RTT Monitor



1. Why there are no alerts from the device?

You might not have received alerts from the device if the trap host is not configured in the  source Router. Make sure you configure the routers to send traps to NetFlow Analyzer. Telnet the router and type the following command:

snmp-server host <netflowanalyzer server IP> traps <host community string> rtr

For instance, if the NetFlow Analyzer's host IP Address is 192.168.18.128, and the community string is private, the command would be:

snmp-server host 192.168.18.128 traps private rtr

2. Why  should i give Snmp Write community to the router?

Both, the SNMP read and write community string needs to be set on the source router. The write community is used to configure the IPSLA agent on the device while the read community is used by NetFlow Analyzer to gather performance data from the router.


3. Why I am getting 'Source router SNMP write community may be wrong' error message?

NetFlow Analyzer uses SNMP to gather data from the Cisco IP SLA agent. This error is displayed when wrong SNMP read / write community string is configured for the source router of the WAN RTT Monitor in NetFlow Analyzer. 

To configure the correct SNMP write community string in NetFlow Analyzer, go to the snapshot page of the source router and change the SNMP credentials by clicking on the "Click here to change" corresponding to the "passwords" field. In the pop-up enter the appropriate credentials and submit it. After successfully submitting the correct SNMP credentials, try to add the VoIP Monitor again for the Source device (Modules > WAN RTT > Settings)

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