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OPERATIONAL DEFECT DATABASE
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Upon establishing a new console connection or a new Telnet/SSH session to the Cat9k High Availability setup [be it a Cat9300 stack using the back-side stacking technology or a Cat9500 Stackwise Virtual pair using the front-side stacking] the following log messages may be seen: Console session Cat9300_stack# [console-relay] Selected VTY line number 1 for console relay. [console-relay] Checking VTY access: addr(0xABCDEFAB) tableid(266) liin_tableid(266) [console-relay] Selected VTY line number 1 for console relay. [console-relay] Checking VTY access: addr(0xABCDEFAB) tableid(266) liin_tableid(266) [console-relay] LIIN tableid check passed. [console-relay] VTY-1. Relayed console using settings: terminal length: 24, width: 80, execution timeout: 600000 milliseconds, rx/tx speed: 9600/9600. Using existing?(false). Defaults exist?(false). [console-relay] Detected console relayed from member. Adding a logger. [console-relay] LIIN tableid check passed. [console-relay] VTY-1. Relayed console using settings: terminal length: 24, width: 80, execution timeout: 600000 milliseconds, rx/tx speed: 9600/9600. Using existing?(false). Defaults exist?(false). Cat9300_stack# Telnet session Cat9300_stack# [console-relay] Checking VTY access: addr(0xABCDEFAB) tableid(1) liin_tableid(266) [console-relay] Checking VTY access: addr(0xABCDEFAB) tableid(1) liin_tableid(266) Cat9300_stack# where 0xABCDEFAB represents IPv4 address from where the session was initiated [in hexadecimal format]
Cat9k High Availability setup [be it a Cat9300 stack using the back-side stacking technology or a Cat9500 Stackwise Virtual pair using the front-side stacking] 17.02.01 or newer version switchover has occurred new console connection or new Telnet/SSH session
Execute the 'undebug all' command or the 'no debug platform software console-relay' command 17.01.01 and older version do not exhibit this phenomenon
This situation occurs because the standby switch has the console relay debug [debug platform software console-relay] enabled out-of-box [without explicitly being enabled by the user] Cat9300_stack#show debugging Packet Infra debugs: Ip Address Port ------------------------------------------------------|---------- Cat9300_stack# Cat9300_stack-stby#show debugging Console relay: platform software console-relay basic debugging is on Packet Infra debugs: Ip Address Port ------------------------------------------------------|---------- Cat9300_stack-stby# Upon switchover, the standby switch [with the debugs enabled] becomes the active switch and this debug will generate the log messages shown above