network protocol traffic connecting to other DECnet Level-2 Area Routers providing DECnet communication with various VAX, PDP and other DECnet-speaking machines around the world as a part of
(the global hobbyist DECnet network).
At this time I am running Cisco IOS Software, 7200 Software (C7200-A3JK9S-M), Version 12.4(25d), RELEASE SOFTWARE (fc1) on the 7204VXR. The software comes with an excellent SNMP agent that includes DECnet routing information available to external SNMP clients.
The intent of this post is to summarize in one place the MIB definition files and configuration instructions for Debian-based Linux distributions for accessing the information provided by the SNMP agent on the switch in a pretty way. A specific goal was to have snmpwalk display DECnet information using fully defined human-readable OIDs instead of long series of dot-separated raw SNMP OIDs.
These steps are common for any installation of Net-SNMP on a Debian-derived Linux distribution (including Ubuntu 20.04). As root:
At this point, SNMP tools should be able to find and use the MIBs. Test with
We need three additional MIBs for fully defining human-readable OIDs comprising DECnet-related entries in Cisco's SNMP information base. Grab them from the following links and copy them to /usr/share/snmp/mibs directory that is included in Net-SNMP MIB search path.
Walk the CISCO MIB using a command line like below. Provide the correct IP address and community string.
OLD-CISCO-DECNET-MIB::dnArea.1 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnArea.2 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnArea.5 = INTEGER: 5
OLD-CISCO-DECNET-MIB::dnArea.9 = INTEGER: 9
OLD-CISCO-DECNET-MIB::dnArea.12 = INTEGER: 12
OLD-CISCO-DECNET-MIB::dnArea.24 = INTEGER: 24
OLD-CISCO-DECNET-MIB::dnArea.27 = INTEGER: 27
OLD-CISCO-DECNET-MIB::dnArea.28 = INTEGER: 28
OLD-CISCO-DECNET-MIB::dnArea.29 = INTEGER: 29
OLD-CISCO-DECNET-MIB::dnArea.30 = INTEGER: 30
OLD-CISCO-DECNET-MIB::dnArea.31 = INTEGER: 31
OLD-CISCO-DECNET-MIB::dnArea.33 = INTEGER: 33
OLD-CISCO-DECNET-MIB::dnArea.34 = INTEGER: 34
OLD-CISCO-DECNET-MIB::dnArea.35 = INTEGER: 35
OLD-CISCO-DECNET-MIB::dnArea.38 = INTEGER: 38
OLD-CISCO-DECNET-MIB::dnArea.39 = INTEGER: 39
OLD-CISCO-DECNET-MIB::dnArea.41 = INTEGER: 41
OLD-CISCO-DECNET-MIB::dnArea.42 = INTEGER: 42
OLD-CISCO-DECNET-MIB::dnArea.52 = INTEGER: 52
OLD-CISCO-DECNET-MIB::dnArea.59 = INTEGER: 59
OLD-CISCO-DECNET-MIB::dnArea.60 = INTEGER: 60
OLD-CISCO-DECNET-MIB::dnArea.61 = INTEGER: 61
OLD-CISCO-DECNET-MIB::dnArea.62 = INTEGER: 62
OLD-CISCO-DECNET-MIB::dnACost.1 = INTEGER: 10
OLD-CISCO-DECNET-MIB::dnACost.2 = INTEGER: 8
OLD-CISCO-DECNET-MIB::dnACost.5 = INTEGER: 15
OLD-CISCO-DECNET-MIB::dnACost.9 = INTEGER: 7
OLD-CISCO-DECNET-MIB::dnACost.12 = INTEGER: 10
OLD-CISCO-DECNET-MIB::dnACost.24 = INTEGER: 13
OLD-CISCO-DECNET-MIB::dnACost.27 = INTEGER: 7
OLD-CISCO-DECNET-MIB::dnACost.28 = INTEGER: 15
OLD-CISCO-DECNET-MIB::dnACost.29 = INTEGER: 9
OLD-CISCO-DECNET-MIB::dnACost.30 = INTEGER: 7
OLD-CISCO-DECNET-MIB::dnACost.31 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnACost.33 = INTEGER: 6
OLD-CISCO-DECNET-MIB::dnACost.34 = INTEGER: 8
OLD-CISCO-DECNET-MIB::dnACost.35 = INTEGER: 14
OLD-CISCO-DECNET-MIB::dnACost.38 = INTEGER: 18
OLD-CISCO-DECNET-MIB::dnACost.39 = INTEGER: 5
OLD-CISCO-DECNET-MIB::dnACost.41 = INTEGER: 5
OLD-CISCO-DECNET-MIB::dnACost.42 = INTEGER: 6
OLD-CISCO-DECNET-MIB::dnACost.52 = INTEGER: 14
OLD-CISCO-DECNET-MIB::dnACost.59 = INTEGER: 3
OLD-CISCO-DECNET-MIB::dnACost.60 = INTEGER: 10
OLD-CISCO-DECNET-MIB::dnACost.61 = INTEGER: 5
OLD-CISCO-DECNET-MIB::dnACost.62 = INTEGER: 15
OLD-CISCO-DECNET-MIB::dnAHop.1 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.2 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.5 = INTEGER: 3
OLD-CISCO-DECNET-MIB::dnAHop.9 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.12 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.24 = INTEGER: 3
OLD-CISCO-DECNET-MIB::dnAHop.27 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.28 = INTEGER: 3
OLD-CISCO-DECNET-MIB::dnAHop.29 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.30 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.31 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAHop.33 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.34 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.35 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.38 = INTEGER: 4
OLD-CISCO-DECNET-MIB::dnAHop.39 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.41 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.42 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.52 = INTEGER: 3
OLD-CISCO-DECNET-MIB::dnAHop.59 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.60 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAHop.61 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAHop.62 = INTEGER: 2
OLD-CISCO-DECNET-MIB::dnAIfIndex.1 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.2 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.5 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.9 = INTEGER: 14
OLD-CISCO-DECNET-MIB::dnAIfIndex.12 = INTEGER: 25
OLD-CISCO-DECNET-MIB::dnAIfIndex.24 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.27 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.28 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.29 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.30 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.31 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAIfIndex.33 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.34 = INTEGER: 20
OLD-CISCO-DECNET-MIB::dnAIfIndex.35 = INTEGER: 21
OLD-CISCO-DECNET-MIB::dnAIfIndex.38 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.39 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.41 = INTEGER: 22
OLD-CISCO-DECNET-MIB::dnAIfIndex.42 = INTEGER: 23
OLD-CISCO-DECNET-MIB::dnAIfIndex.52 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnAIfIndex.59 = INTEGER: 25
OLD-CISCO-DECNET-MIB::dnAIfIndex.60 = INTEGER: 25
OLD-CISCO-DECNET-MIB::dnAIfIndex.61 = INTEGER: 26
OLD-CISCO-DECNET-MIB::dnAIfIndex.62 = INTEGER: 1
OLD-CISCO-DECNET-MIB::dnANextHop.1 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.2 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.5 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.9 = Hex-STRING: FF 27
OLD-CISCO-DECNET-MIB::dnANextHop.12 = Hex-STRING: FC EF
OLD-CISCO-DECNET-MIB::dnANextHop.24 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.27 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.28 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.29 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.30 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.31 = Hex-STRING: 00 00
OLD-CISCO-DECNET-MIB::dnANextHop.33 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.34 = Hex-STRING: FF 8B
OLD-CISCO-DECNET-MIB::dnANextHop.35 = Hex-STRING: FF 8F
OLD-CISCO-DECNET-MIB::dnANextHop.38 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.39 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.41 = Hex-STRING: 01 A4
OLD-CISCO-DECNET-MIB::dnANextHop.42 = Hex-STRING: FE AB
OLD-CISCO-DECNET-MIB::dnANextHop.52 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnANextHop.59 = Hex-STRING: FC EF
OLD-CISCO-DECNET-MIB::dnANextHop.60 = Hex-STRING: FC EF
OLD-CISCO-DECNET-MIB::dnANextHop.61 = Hex-STRING: FF F7
OLD-CISCO-DECNET-MIB::dnANextHop.62 = Hex-STRING: 03 7C
OLD-CISCO-DECNET-MIB::dnAAge.1 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.2 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.5 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.9 = INTEGER: 33
OLD-CISCO-DECNET-MIB::dnAAge.12 = INTEGER: 40
OLD-CISCO-DECNET-MIB::dnAAge.24 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.27 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.28 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.29 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.30 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.31 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.33 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.34 = INTEGER: 43
OLD-CISCO-DECNET-MIB::dnAAge.35 = INTEGER: 25
OLD-CISCO-DECNET-MIB::dnAAge.38 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.39 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.41 = INTEGER: 125
OLD-CISCO-DECNET-MIB::dnAAge.42 = INTEGER: 39
OLD-CISCO-DECNET-MIB::dnAAge.52 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.59 = INTEGER: 26
OLD-CISCO-DECNET-MIB::dnAAge.60 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAAge.61 = INTEGER: 43
OLD-CISCO-DECNET-MIB::dnAAge.62 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.1 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.2 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.5 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.9 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.12 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.24 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.27 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.28 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.29 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.30 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.31 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.33 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.34 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.35 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.38 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.39 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.41 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.42 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.52 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.59 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.60 = INTEGER: 0
OLD-CISCO-DECNET-MIB::dnAPrio.61 = INTEGER: 64
OLD-CISCO-DECNET-MIB::dnAPrio.62 = INTEGER: 0
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