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Cisco Bug: CSCuj61034 - Can't SSH into router.

Last Modified

May 12, 2020

Products (19)

  • Cisco ASR 9000 Series Aggregation Services Routers
  • Cisco CRS-1 Line Card Chassis (Dual)
  • Cisco CRS-1 Line Card Chassis (Multi)
  • Cisco CRS-3 Multishelf System
  • Cisco CRS-1 16-Slot Line Card Chassis
  • Cisco ASR 9922 Router
  • Cisco CRS-1 4-Slot Single-Shelf System
  • Cisco IOS XR Software
  • Cisco ASR 9010 Router
  • Cisco CRS-1 8-Slot Line Card Chassis
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Known Affected Releases

4.2.3.BASE 4.3.2.MGBL

Description (partial) 

Cannot SSH into router.

The router generates the following log messages:
RP/0/RP0/CPU0 : SSHD_[65915]: %SECURITY-SSHD-3-ERR_GENERAL : Failed to allocate pty

RP/0/RP0/CPU0 : devc-vty[181]: %MGBL-TTY-3-KERNEL : Unexpected internal error encountered 'Resource temporarily unavailable'  : pkg/bin/devc-vty : (PID=536791) :  -Traceback= 83d56c4 bc28137 bc28e2a 83d0882 83d181a 83d6c56 83d25a7 83d3577 822706e 8227016 82242c5 83e85fa 83e9a4a 42000c1 4200038

Cannot SSH into router.

The router generates the following log messages:
RP/0/RP0/CPU0 : SSHD_[65915]: %SECURITY-SSHD-3-ERR_GENERAL : Failed to allocate pty

RP/0/RP0/CPU0 : devc-vty[181]: %MGBL-TTY-3-KERNEL : Unexpected internal error encountered 'Resource temporarily unavailable'  : pkg/bin/devc-vty : (PID=536791) :  -Traceback= 83d56c4 bc28137 bc28e2a 83d0882 83d181a 83d6c56 83d25a7 83d3577 822706e 8227016 82242c5 83e85fa 83e9a4a 42000c1 4200038

Symptom:Cannot SSH into router.

The router generates the following log messages:
RP/0/RP0/CPU0 : SSHD_[65915]: %SECURITY-SSHD-3-ERR_GENERAL : Failed to allocate pty

RP/0/RP0/CPU0 : devc-vty[181]: %MGBL-TTY-3-KERNEL : Unexpected internal error encountered 'Resource temporarily unavailable'  : pkg/bin/devc-vty : (PID=536791) :  -Traceback= 83d56c4 bc28137 bc28e2a 83d0882 83d181a 83d6c56 83d25a7 83d3577 822706e 8227016 82242c5 83e85fa 83e9a4a 42000c1 4200038

Conditions:* SSH is configured
* Trying to connect to the router via SSH
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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