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[MX 480] No console access on devices Master RE

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  • 1.  [MX 480] No console access on devices Master RE

    Posted 02-23-2018 01:41

    Hi all, 

     

    I'm recently having issues conencting to one of my mx480 routers (Junos: 15.1F6-S2.3) routing engine console port. 

     

    Trying xxxxx...
    Connected to xxxxx.
    Escape character is '^]'.

     

    We've swapped the console cables from RE 1 to RE 0 to rule out any issues of cabling and / or configuration.

    I''ve tested also with a direct console connection from my laptop into RE 0 but I still get no output.

     

    No changes were made on the device in order to restrict or tamper with the console

    access and I'm wondering if I need to enable or restart a process in order to regain console access. 

     

    Has anyone else come across this issue ?

     

     

    Thanks, 

     



  • 2.  RE: [MX 480] No console access on devices Master RE

     
    Posted 02-23-2018 03:00

    Hi,

     

    At the console terminal widow, type CTRL Z or CTRL X and try again.

    Hope you're setting the right serial port values:

    https://www.juniper.net/documentation/en_US/release-independent/junos/topics/task/installation/port-mx960-console-aux-connecting.html

     

    BTW, are you able too ssh? if yes, check the message logs and try to console, look out for abonrmal log?

    If possible, could you restart mdg process (restart management) and try console?

     

     

     

     

     

     

     

     



  • 3.  RE: [MX 480] No console access on devices Master RE

    Posted 02-23-2018 04:42

    Hi karand, 

     

    We did set the console values correctly. As mentioed previously we swapped the consoles between the 

    REs and we could reach RE1 without issues, moreover we did manage to connect to RE1 also without issues using a laptop and acable. 

     

    I think I'll go by your recomandation of restarting mgd process though 

    (CTRL-X/CTRL-Z did not make a difference btw) and will report back. 

     

    PS: SSH is also working fine, no issues there.

    Regards, 

    rei



  • 4.  RE: [MX 480] No console access on devices Master RE

     
    Posted 02-24-2018 09:12

    Confirm that the console port is not disabled under

    system ports console

     



  • 5.  RE: [MX 480] No console access on devices Master RE

    Posted 03-07-2018 00:50

    Hi spuluka, 

     

    Console is not disabled and it's not even defined under system . 

    My question though is if I restart the MGD process then will this affect in any way the forwarding plane ?

     

    Since my issue is reaching via console, RE 0 which is Master right now do I need to 

    do a RE switchover and then execute the command so as not to potentally affect the forwarding plane  ?

     

    Thanks, 

    rei



  • 6.  RE: [MX 480] No console access on devices Master RE

     
    Posted 03-07-2018 00:56

    Hi Rei,

     

    Would suggest restart mgd before RE switch.

     

     

     

     



  • 7.  RE: [MX 480] No console access on devices Master RE

    Posted 03-07-2018 01:59

    If restart the MGT or reboot RE and verify any session logs. And also try with Secure CRT or Putty with diffrent version of settings.



  • 8.  RE: [MX 480] No console access on devices Master RE

    Posted 03-29-2018 02:35

     

    If I restart the MGD process will it affect the forwarding plane ?

     

    Thanks, 

    rei



  • 9.  RE: [MX 480] No console access on devices Master RE

    Posted 03-29-2018 03:24

    Yes we can restart the MGD without distrub the forwarding plane traffic.



  • 10.  RE: [MX 480] No console access on devices Master RE
    Best Answer

     
    Posted 03-29-2018 08:17

    Hi,

     

    Its been a while, you still haven't restart MGD??
    Prior restarting mgd,  try "commit full | display detail" once and then try to console.
    BTW, I'd ask this previously, could you monitor the messages log (/var/log/messages) & look out for abonrmal log when you attempt to console the master RE.

    1. commit full | display detail. Once commit is completed, check for console.

    2. restart management.  Once MGD is restarted, wait for 30~40 secs and check for console.

    3. schdule a M/w for RE switch if step1 & 2 doesn't help. Prior switch, check following on RE to ensure RE is ready for switch:

    >show task replication
    >show database-replication summary
    >request chassis routing-engine master switch check
    >show system switchover (on backup RE)
    >request chassis routing-engine master switch (on master RE)

     

     



  • 11.  RE: [MX 480] No console access on devices Master RE

    Posted 04-11-2018 00:57

    Hi,

     

    Sorry for the late reply but it takes time to perform an action on this particular router 🙂

     

    Restarting the mgd process did not yield any results and console was still unavailabe. 

    So I switched the mastership and rebooted RE0 which brought back the console line.

     

    Connected to aa.bb.cc.dd
    Escape character is '^]'.


    FreeBSD/i386 (xxxx_RE0) (ttyu0)

    login:

    ---

    Model RE-S-2000
    Serial ID xxxxxxxxxxx
    Start time 2018-04-05 04:45:38 CEST
    Uptime 6 days, 4 hours, 57 minutes, 46 seconds
    Last reboot reason Router rebooted after a normal shutdown.

     

    Thank you all for your input, 

    rei



  • 12.  RE: [MX 480] No console access on devices Master RE

    Posted 03-29-2018 12:31

    Hi rei,

     

    Please follow below KB to restart mgd process.

     

    How to restart the MGD process

     

    //Regards

    AD