Collecting Device Serial Numbers and Asset Tags over SNMP
A few weeks ago, one of our customers asked us if we could pull serial numbers out of Cisco devices because this would be very useful for their MSSP business. We were able to update the scan engine quick and this feature is now included as of release 1.15.3. Pulling serial numbers remotely can be very useful to for support questions and to see if a device’s warranty has expired and it should be replaced. You must have SNMP credentials (or the v2 community “public”) configured for your scans for this query to work.
If taking old equipment off the network is your use case, Rumble can also show the device age based on the MAC address manufacturing date.
In your Rumble Console, go to Inventory in the left navigation and enter:
Clicking on a host in this list and scrolling down to the SNMP section, we see the serial number for this Netgear device:
Clicking on the left-side search icon will produce a report of all serial numbers found across the organization:
A similar feature enables you to find the asset tags of Dell iDRAC systems, which are stored in the
snmp.sysName property. A good query to use to find these is:
You can also filter for specific asset tags. A good query to find Dell iDRAC Asset Tags is:
Clicking on the left-side search icon will produce a report of all SNMP system names across the organization, including the Dell iDRAC asset tags. These asset tags can be queried online from the Dell website to obtain the full specification of the hardware.
For Rumble Enterprise users who need to manage Cisco device warranties or support warranty contracts, there is a new export format available that makes sharing data between Rumble and the Smart Net Total Care (SNTC) portal a lot easier. The Rumble Cisco SNTC CSV export is formatted specifically so you can export your data and directly import it into your SNTC portal.
In your Rumble Console, go to your inventory and filter only for Cisco devices (
os:cisco). From the Export menu, you can see options to export all assets or queried asset results.
From the Export menu, choose Cisco SNTC CSV, located under Export Search Results.
This will only export the results from the
os:cisco query. The export includes the host name, IP address, serial number, product ID, MAC address, system location, software type, and software version.
If you are not seeing any results, make sure that a valid SNMP v2 or v3 credential was provided as part of the discovery scan.
If you haven’t had a chance to try Rumble, or would like to find serial numbers & asset tags on your internal network, sign up for a free trial and let us know what you think!
October 25, 2021
How to find Cisco devices running IOS XE
Cisco recently disclosed a command execution vulnerability that affects some versions of IOS XE SD-WAN software running on Cisco routing devices and virtual instances. With a CVSSv3 score of 7.8, this vulnerability (assigned CVE-2021-1529) is due to inadequate input …Read More
February 9, 2021
Rumble 1.16: Duplicate SSH Keys, Rogue Remote Access Solutions, and Device Serial Numbers/Asset Tags
Rumble v1.16 Rumble Network Discovery 1.16 is out, helping you find duplicate SSH keys, monitor for rogue remote access solutions, and collect device serial numbers and asset tags. Finding Duplicate SSH Host Keys Rumble excels at finding outliers on the network, and …Read More
January 3, 2020
Security Surprises with SNMP v3
Update (2021-10-08): This issue was cited in an excellent paper on SNMP v3 discovery by Taha Albakour, Oliver Gasser, Robert Beverly, and Georgios Smaragdakis. If you are interested in this type of research, please check out our Modern Network Discovery presentation and …Read More