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Periodically Spectrum Network Configuration Manager captures or uploads fail for SSH/SCP communication mode

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Article ID: 20728

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Updated On:

Products

CA Spectrum

Issue/Introduction

Periodically Spectrum Network Configuration Manager (NCM) captures or uploads fail for SSH/SCP communication mode and $SPECROOT/NCM/NCMSERV.OUT file contains similar errors

java.io.EOFException: SSHSCP1: premature EOF
      at com.mindbright.sshcommon.SSHSCP1.readFully(SSHSCP1.java:444)
      at com.mindbright.sshcommon.SSHSCP1.readFromRemote(SSHSCP1.java:285)
      at com.mindbright.sshcommon.SSHSCP1.copyToLocal(SSHSCP1.java:179)
      at com.mindbright.util.SshSCPConnection.copyFromRemote(SshSCPConnection.java:192)
      at com.aprisma.spectrum.scmd.CiscoSCP.captureConfig(CiscoSCP.java:143)
      at com.aprisma.spectrum.scmd.CiscoSCP.captureRunningConfig(CiscoSCP.java:98)
      at com.aprisma.spectrum.scmd.ScmServiceImpl.captureRunningConfigImpl(ScmServiceImpl.java:278)
      at com.aprisma.spectrum.scmd.ScmServiceImpl.captureRunningConfigRun(ScmServiceImpl.java:194)
      at com.aprisma.spectrum.scmd.ScmServiceImpl.access$000(ScmServiceImpl.java:30)
      at com.aprisma.spectrum.scmd.ScmServiceImpl$1.run(ScmServiceImpl.java:1861)
      at java.lang.Thread.run(Thread.java:662)

Environment

Any

Resolution

For Spectrum 10.1 and below:

1. Create new file in $SPECROOT/NCM/ncmprops
2. Add single line entry covering:
    com.mindbright.ssh2.SSH2StreamChannel.checkRxWindowSize.enabled=true

Setting will automatically be picked up in about 5 seconds of ncmprops file being saved and at time of next NCM SSH/SCP capture task.

In addition to this setting additional setting for the Mindterm library usage could be added:
     com.mindbright.sshcommon.SSHSCP1.readFully.initstat1=true
     com.mindbright.sshcommon.SSHSCP1.readFully.initwait=10000
     com.mindbright.ssh2.SSH2InternalChannel.usejavaapi=true


NOTE: The ncmprops will not be overwritten on upgrade, but will need to be added to any SpectroSERVER that has devices which will use the SSH/SCP communication mode for NCM. 

For Spectrum 10.2 and above:

A new library implementation via "jsch" is available which then avoids using Mindterm library for NCM SSH/SCP tasks. Please reference the "NCM Support for SSH using Jsch libraries" section of the documentation form more information.