I'm currently using a Cisco 7613 for aggregation of customer T1 circuits. I am terminating approximately 36 DS3s on this device. We use an MRTG type solution for providing a graphical representation of interface utilization for the individual T1 circuits.
This setup has prompted a discussion of whether it better to poll (SNMP) the 7613 for all the interface data or the T1 interfaces on each of the customer T1 routers.
That said, my questions are:
1. What is the standard practice in this situation?
2. Is there a significant impact to 7613 when performing heavy SNMP polling?
3. Is the increase in network traffic significant when polling a large number of remote devices?
Any thoughts or experience with this would be appreciated.