LRS Reference Manual
B - SNMP Support
- B.1 - Introduction
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- B.2 - LRS SNMP Support
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B.1 Introduction
SNMP is an abbreviation for Single Network Management Protocol. SNMP commands enable users (usually system administrators) to get information from and control other nodes on a local area network.
Information about SNMP can be obtained in RFCs (Request For Comments). RFCs can be obtained via anonymous FTP from nisc.jvnc.net. To obtain a specific RFC, use the pathname pub/RFC/ rfcnnn, where nnn is the name of the desired RFC. To obtain the RFC index, use the pathname pub/RFC/rfc-index.txt.
The extent to which other nodes may be controlled and/or queried for information is documented in Management Information Bases (MIBs). The MIBs and SNMP in general are documented in RFCs 1066, 1067, 1098,1317, 1318, and 1213.
The following MIBs are supported:
| MIB-II (RFC 1213): | System, Interface, Address Translation, IP, ICMP, TCP, and UDP. They do not support the EGP group. |
| RS-232 MIB (RFC 1317): | All objects (RS-232-style objects). |
| Character MIB (RFC 1318): | All objects (character-oriented devices). |
B.2 LRS SNMP Support
- The LRS will respond to queries for unknown MIBs with a "not in MIB" error to the requesting host.
- The LRS has a local SNMP security table to restrict or prevent unauthorized SNMP configuration.
- The LRS will also generate limited forms of 3 of the SNMP traps. Traps are sent to a host when an abnormal event occurs on the LRS.
Currently, the LRS will generate a Coldstart trap when it first boots, and will send a Linkup trap when the startupfile (if any) has been read from a host and normal operation commences. If a startupfile has been configured but the download fails, the LRS will send an Authentication trap. In all 3 cases, the trap will be directed to the IP address of the loadhost for the LRS. If a loadhost has not been specified (Flash ROM based units, for example), the traps will not be sent. The LRS will not generate traps other than the cases listed here.
LRS Reference Manual - 4 MARCH 1996
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