SNMPv3 credentials are not working in Spectrum to Device

Products

• CA Spectrum
• DX NetOps

Issue/Introduction

We created an SNMPv3 profile and used it to model a device using the Model by IP functionality in Spectrum OneClick.

When the OK button is selected, a popup window appears stating the device is reachable via ICMP but not SNMP.

Cause

Running a sniffer trace on the SpectroSERVER system sniffing the ip address of the device being modeled showed the following response from the device:

usmStatsUnknownUserNames OBJECT-TYPE
 SYNTAX Counter32 (0 .. 4294967295)
 ACCESS read-only
 STATUS current

 DESCRIPTION
 "The total number of packets received by the SNMP engine which were dropped because they referenced a user that was not known to the SNMP engine."
  ::= { usmStats 3 }

-- 1.3.6.1.6.3.15.1.1.3

Basically, the device is responding to the SNMPv3 request stating the user in the SNMPv3 profile is not recognized.

Environment

Release : Any

Component : Spectrum Discovery

Resolution

Verify the user specified in the SNMPv3 profile is correct for the device being modeled.