RFC 1857 (rfc1857) - Page 2 of 27

A Model for Common Operational Statistics

RFC 1857                 Operational Statistics             October 1995


   3.3.4   Per Interface Variables not in any MIB ................... 9
   3.3.5   Per Node Variables ....................................... 9
   3.3.6   Metrics not being Retrievable with SNMP ................. 10
   3.4     Recommended Metrics ..................................... 10
   4.      Polling Frequencies ..................................... 10
   4.1     Variables Needing High Resolution Polling ............... 11
   4.2     Variables not Needing High Resolution Polling ........... 11
   5.      Pre-Processing of Raw Statistical Data .................. 11
   5.1     Optimizing and Concentrating Data to Resources .......... 11
   5.2     Aggregation of Data ..................................... 12
   6.      Storing of Statistical Data ............................. 12
   6.1     The Storage Format ...................................... 13
   6.1.1   The Label Section ....................................... 14
   6.1.2   The Device Section ...................................... 15
   6.1.3   The Data Section ........................................ 17
   6.2     Storage Requirement Estimations ......................... 17
   7.      Report Formats .......................................... 18
   7.1     Report Types and Contents ............................... 18
   7.2     Contents of the Reports ................................. 19
   7.2.1   Offered Load by Link .................................... 19
   7.2.2   Offered Load by Customer ................................ 19
   7.2.3   Resource Utilization Reporting .......................... 20
   7.2.3.1 Utilization as Maximum Peak Behavior .................... 20
   7.2.3.2 Utilization as Frequency Distribution of Peaks .......... 20
   8.      Considerations for Future Development ................... 20
   8.1     A Client/Server Based Statistical Exchange System ....... 21
   8.2     Inclusion of Variables not in the Internet Standard MIB . 21
   8.3     Detailed Resource Utilization Statistics ................ 21
   Appendix A  Some formulas for statistical aggregation ........... 22
   Appendix B  An example .......................................... 24
   Security Considerations ......................................... 27
   Author's Address ................................................ 27

1.  Introduction

   Many network administrations commonly collect and archive network
   management metrics that indicate network utilization, growth and
   reliability.  The primary goals of this activity are to facilitate
   near-term problem isolation and longer-term network planning within
   the organization.  There is also the broader goal of cooperative
   problem isolation and network planning among network administrations.
   This broader goal is likely to become increasingly important as the
   Internet continues to grow, particularly as the number of Internet
   service providers expands and the quality of service between
   providers becomes more of a concern.






Lambert                      Informational