SNMPBULKWALK(1)

💖 SNMPBULKWALK 💖

okay so bestie, welcome to snmpbulkwalk from the Net-SNMP fam — this is the little icon that goes and fetches a whole subtree of management values using SNMP GETBULK requests. yes, a whole tree, in one go. main character energy fr fr. 🌳✨

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✨ SYNOPSIS ✨

snmpbulkwalk [APPLICATION OPTIONS] [COMMON OPTIONS] AGENT [OID]

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🦋 DESCRIPTION 🦋

so snmpbulkwalk is an SNMP application that uses SNMP GETBULK requests to query a network entity efficiently for a tree of information. like, it doesn't do the one-at-a-time thing, it just asks nicely for a bunch at once. slay.

You can hand it an object identifier (OID) right on the command line. That OID tells it which portion of the object identifier space is gonna get searched using GETBULK requests. Every single variable in the subtree below the OID you gave gets queried, and their values get presented to you. 💅

Each variable name comes out in the format specified over in variables(5). iykyk.

If you don't pass an OID argument at all? No worries, snmpbulkwalk will search MIB-2 by default. it just knows what to do. 🫶

Now — if the network entity has an error processing the request packet, an error packet comes back and a message gets shown, helping you pinpoint why the request was malformed. so helpful honestly.

And if the tree search causes attempts to search beyond the end of the MIB, you'll get the message "End of MIB" displayed. that's it, that's the end, no more tree. 🌸

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🎀 OPTIONS 🎀

• -Cc — do NOT check whether the returned OIDs are increasing. Some agents (LaserJets are an example 👀) return OIDs out of order but can still complete the walk anyway. Other agents return OIDs that are out of order and can cause snmpbulkwalk to loop indefinitely 😭. By default, snmpbulkwalk tries to detect this behavior and warns you when it hits an agent acting illegally. Use -Cc to turn off this behaviour. (drama, but valid drama.)
• -Ci — include the given OID in the search range. Normally snmpbulkwalk uses GETBULK requests starting with the OID you specified and returns all results in the MIB tree after that OID. But sometimes you wanna include the OID you put on the command line in the printed results, if it's a valid OID in the tree itself. This option lets you do exactly that. periodt.
• -Cn<NUM> — set the non-repeaters field in the GETBULK PDUs. This specifies the number of supplied variables that should not be iterated over. The default is 0.
• -Cp — upon completion of the walk, print the number of variables found. little report card moment 📝
• -Cr<NUM> — set the max-repetitions field in the GETBULK PDUs. This specifies the maximum number of iterations over the repeating variables. The default is 10.

In addition to these options, snmpbulkwalk takes the common options described in the snmpcmd(1) manual page. 📖

⚠️ Note that snmpbulkget REQUIRES an argument specifying the agent to query and at most one OID argument, as described above. one. not two. okay bestie? 💀

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🌈 EXAMPLE 🌈

The command:

snmpbulkwalk -v2c -Os -c public zeus system

will retrieve all of the variables under system:

sysDescr.0 = STRING: "SunOS zeus.net.cmu.edu 4.1.3_U1 1 sun4m"
sysObjectID.0 = OID: enterprises.hp.nm.hpsystem.10.1.1
sysUpTime.0 = Timeticks: (155274552) 17 days, 23:19:05
sysContact.0 = STRING: ""
sysName.0 = STRING: "zeus.net.cmu.edu"
sysLocation.0 = STRING: ""
sysServices.0 = INTEGER: 72

In contrast to snmpwalk, this information will typically be gathered in a single transaction with the agent, rather than one transaction per variable found. snmpbulkwalk is thus more efficient in terms of network utilisation, which may be especially important when retrieving large tables. the way it just... batches. obsessed. 🔥

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⭐ NOTE ⭐

As the name implies, snmpbulkwalk utilizes the SNMP GETBULK message, which is not available in SNMP v1. so if you're on v1, this is not the vibe, sorry bestie 🙈

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👑 SEE ALSO 👑

snmpcmd(1), variables(5).

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Net-SNMP version V5.9.5.2, dated 01 May 2002 💜 — yeah it's been around a minute and it still ate. go walk a MIB, bestie, you got this 🧚💖