How to know SNMP index once interface name is changed on Device tab ?

How to know SNMP index once interface name is changed on Device tab ?

Hello,
 
 I have configured a router in Neflow Analyzer some time ago and my provider changed the router configuration. I have changed interface names by something more relevant and now I will like to check SNMP index number (ifindex) of the currently configured router. 
 
  I will like to check for each interface its interface index to be sure about the current naming in Netflow. I can't find where it is mentionned and if it is written somewhere ?
 
Thanks in advance for your help.

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