Management Information for TCP/IP-based internets", STD 16, RFC
1155, Performance Systems International, Hughes LAN Systems, May
1990.
[4] McCloghrie K., and M. Rose, Editors, "Management Information Base
for Network Management of TCP/IP-based internets", STD 17, RFC
1213, Performance Systems International, March 1991.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple
Network Management Protocol", STD 15, RFC1157, SNMP Research,
Performance Systems International, Performance Systems
International, MIT Laboratory for Computer Science, May 1990.
[6] McCloghrie, K., and F. Kastenholz, "Evolution of the Interfaces
Group of MIB-II", RFC1573, Hughes LAN Systems, FTP Software,
January 1994.
[7] Information processing systems - Open Systems Interconnection -
Specification of Abstract Syntax Notation One (ASN.1),
International Organization for Standardization. International
Standard 8824, (December, 1987).
[8] Information processing systems - Open Systems Interconnection -
Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1), International Organization for Standardization.
International Standard 8825, (December, 1987).
[9] Rose, M., and K. McCloghrie, Editors, "Concise MIB Definitions",
RFC1212, Performance Systems International, Hughes LAN Systems,
March 1991.
[10] Rose, M., Editor, "A Convention for Defining Traps for use with
the SNMP", RFC1215, Performance Systems International, March
1991.
8. Security Considerations
Security issues are not discussed in this memo.
9. Author's Address
Steven Waldbusser
Carnegie Mellon University
5000 Forbes Ave.
Pittsburgh, PA 15213
EMail: waldbusser@cmu.edu
10. Appendix: Changes from RFC1271
The RMON MIB has not been significantly changed since RFC1271 was
issued.
Two changes were made to object definitions:
1) A new status bit has been defined for the
captureBufferPacketStatus object, indicating that the packet
order within the capture buffer may not be identical to the
packet order as received off the wire. This bit may only be used
for packets transmitted by the probe. Older NMS applications can
safely ignore this status bit, which might be used by newer
agents.
2) The packetMatch trap has been removed. This trap was never
actually 'approved' and was not added to this document along with
the risingAlarm and fallingAlarm traps. The packetMatch trap
could not be throttled, which could cause disruption of normal
network traffic under some circumstances. An NMS should configure
a risingAlarm threshold on the appropriate channelMatches
instance if a trap is desired for a packetMatch event. Note that
logging of packetMatch events is still supported--only trap
generation for such events has been removed.
In addition, several clarifications to individual object definitions
have been added to assist agent and NMS implementors:
- global definition of "good packets" and "bad packets"
- more detailed text governing conceptual row creation and
modification
- instructions for probes relating to interface changes and
disruptions
- clarification of some ethernet counter definitions
- recommended formula for calculating network utilization
- clarification of channel and captureBuffer behavior for some
unusual conditions
- examples of proper instance naming for each table