NCM capture fails with Error - "com.jcraft.jsch.JSchException: Auth fail for methods..."

Products

• DX NetOps
• CA Spectrum

Issue/Introduction

NCM capture of running or starting config fails with the following errors generated in the NCMSERV.OUT log:

Oct 19, 2024 14:44:01.157 - com.aprisma.spectrum.scmd.ScmService.NCM Server Started with services  : [io.grpc.ServerServiceDefinition@272113c4]

com.jcraft.jsch.JSchException: Auth fail for methods 'publickey,keyboard-interactive,password'

        at com.jcraft.jsch.Session.connect(Session.java:521)

        at com.jcraft.jsch.Session.connect(Session.java:199)

        at com.aprisma.spectrum.scmd.JschSSH.getSession(JschSSH.java:97)

        at com.aprisma.spectrum.scmd.CustomSSH.jschCustomCapture(CustomSSH.java:82)

        at com.aprisma.spectrum.scmd.CustomSSH.capture(CustomSSH.java:56)

        at com.aprisma.spectrum.scmd.ScmServiceImpl.captureRunningConfigImpl(ScmServiceImpl.java:704)

        at com.aprisma.spectrum.scmd.ScmServiceImpl.captureRunningConfigRun(ScmServiceImpl.java:474)

        at com.aprisma.spectrum.scmd.ScmServiceImpl$1.run(ScmServiceImpl.java:4151)

        at java.base/java.lang.Thread.run(Unknown Source)

com.jcraft.jsch.JSchException: Auth fail for methods 'publickey,keyboard-interactive,password'

And in the debug output, we see:

Oct 20, 2024 18:31:41.828 (captureRunningConfig for host: 192.168.0.1) - Session created successfully

Oct 20, 2024 18:31:41.834 (captureRunningConfig for host: 192.168.0.1) -  Execute sucessful com.jcraft.jsch.ChannelShell@5yyxxxx

Oct 20, 2024 18:31:41.853 (captureRunningConfig for host: 192.168.0.1) -  Channel connection sucessfull :

Oct 20, 2024 18:31:41.930 (captureRunningConfig for host: 192.168.0.1) - getSSHOutput() started waitTries :5

Oct 20, 2024 18:31:41.930 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :0

Oct 20, 2024 18:31:42.932 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :1

Oct 20, 2024 18:31:43.936 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :2

Oct 20, 2024 18:31:44.939 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :3

Oct 20, 2024 18:31:45.941 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :4

Oct 20, 2024 18:31:46.942 (captureRunningConfig for host: 192.168.0.1) - while true loop counter :5

Oct 20, 2024 18:31:46.942 (captureRunningConfig for host: 192.168.0.1) - exit-status: -1

Environment

DX NetOps Spectrum all currently supported releases

Cause

The exit status is -1 which means it has failed to connect due to SSH authentication problems with the device.

 

Resolution

We've seen issues where the 'Enable Password' is set on the Device Family level:

If config capture still fails; remove the 'Enable Password' field content and test again.