SNMP

Latest revision as of 11:38, 21 January 2022

Opendigitalradio has reserved a Private Entreprise Number for SNMP: 51436

OID: iso.org.dod.internet.private.enterprise.opendigitalradio (1.3.6.1.4.1.51436)

The goal of the Project SNMP is to make the monitoring statistics available through SNMP.

Update January 2022: It is such a pleasure to work with SNMP that this effort has stalled.

[edit] Steps

Understand how to represent our monitoring values in a MIB

List what by whan to monitor and define keyword

Define a MIB structure and write a MIB

The best pratice seem to have 1 MIB by product/software and reserve one sub-level for each

51436.1 for ODR-DabMux

51436.2 for ODR-DabMod

51436.3 for ODR-AudioEnc

51436.4 for ODR-PadEnc

As every tool can be run more than once on a machine, all of them need to start with a table.

Understand how to interface with snmpd and write scripts to connect the mmbTools with snmpd

[edit] Things to monitor

Things to monitor for the ODR-mmbTools:

• ODR-PadEnc
  • Nothing
• ODR-AudioEnc
  • Nothing. Audio levels are available through ODR-DabMux
• ODR-DabMux
  • Seconds until expiry of TAI bulletin
  • For each ZMQ input:
    • state (0 Unknown, 1 NoData, 2 Unstable, 3 Silent, 4 Streaming)
    • min buffer
    • max buffer
    • number of ZMQ underruns (overflows at 2^32 - 1)
    • number of ZMQ overruns (overflows at 2^32 - 1)
    • audio level peak, left channel
    • audio level peak, right channel
  • We could add the number of frames encoded, to detect a stuck multiplexer (To be discussed)
• ODR-DabMod
  • one set of values for CFR
    • Percentage of samples clipped
    • Percentage of errors clipped
    • MER after CFR
    • PAPR before CFR
    • PAPR after CFR
  • The configured TIST offset
  • The current TIST value
  • To be added: The TIST value of the frame FCT=0
  • one set of values for SDR device
    • Number of underruns
    • Number of late packets
    • Number of frames transmitted