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Cisco Bug: CSCuj05123 - Security: 20 sysdb conn are open before user is authenticated via AAA

Last Modified

Jun 10, 2018

Products (1)

  • Cisco Network Convergence System 6000 Series Routers

Known Affected Releases


Description (partial)

while executing telnet tests. We configure "vty-pool default 0 99 line-template vty" and then run script to establish a telnet sessions to consume all possible telnet sessions determined by vty-pool.

as we do this we encounter an issue of where there is an artificial cieling of connection per process on LWM Layer. This leads to leads to sysdb_mc crashing.

This is a scale issue impacting telnet connectivity

this can be easily reproduced by establishing telnet sessions on system running IOS-XR NG 500.38I

on system running IOS-XR NG 500.38I, we configure "vty-pool default 0 99 line-template vty" or any 

We run a script that establishes telnet sessions, that are all active simultaneously. A the while attempting to consume all configured vty-pool.

This will lead to consuming connections on LWM layer.
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