[rancid] Juniper CLI prompts out of sync causing frequent changes

[Chris Wopat]

We actually do not have a banner, but your mention of that reminds me that
indeed, when doing some updates recently we enabled login-tip (
https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/login-tip-edit-system.html/)
which is almost certainly putting something random in a banner-ish area
upon each login.

Here are 3 random examples from the same device:

========================================================
Password:
--- JUNOS 14.1X53-D47.3 built 2018-05-10 21:38:01 UTC
JUNOS tip:
Use the 'no-more' CLI pipe to disable the CLI's more capability and
let the multiple pages of output scroll without stopping.


--- JUNOS 14.1X53-D47.3 built 2018-05-10 21:38:01 UTC
JUNOS tip:
Use ESC-/ in the CLI to expand strings into matching words from the
command line history.

Password:
--- JUNOS 14.1X53-D47.3 built 2018-05-10 21:38:01 UTC
JUNOS tip:
Use the TAB key to autocomplete interface names in operational mode.
========================================================

Since they liberally use dashes, single quotes, forward slashes and so on-
this seems to be the likely culprit?

Would it be possible to filter out anything between "JUNOS tip" and the
first valid prompt so we have a chance of leaving them enabled?


--Chris



On Fri, Jul 27, 2018 at 12:00 PM, heasley <heas at shrubbery.net> wrote:

> Fri, Jul 27, 2018 at 08:18:08AM -0500, Chris Wopat:
> > Hi folks,
> >
> > Last year I commented on an issue we're seeing across many Juniper
> devices.
> > I neglected to follow up on Heasley's response then but are seeing it a
> lot
> > more frequently now, perhaps related to some OS upgrades or something
> else.
> >
> >
> > Thread was here:
> >
> > http://www.shrubbery.net/pipermail/rancid-discuss/2017-
> October/009916.html
> > http://www.shrubbery.net/pipermail/rancid-discuss/2017-
> October/009922.html
> >
> > Looking at the last week or so of these we've had, they're on devices
> > running 14.1X53-D4*, which is primaraily QFX5100 but also a few EX4200.
> >
> > Here's output from a single diff, its like this on various commands
> nearly
> > every run:
> >
> >
> >
> > Index: configs/r-kettlemoraine-hub
> > ===================================================================
> > retrieving revision 1.144
> > diff -u -4 -r1.144 r-kettlemoraine-hub
> > @@ -1,7 +1,8 @@
> >   #RANCID-CONTENT-TYPE: juniper
> >   #
> >   # r-kettlemoraine-hub> show chassis clocks
> > + # show chassis environment
> >   # r-kettlemoraine-hub> show chassis environment
> >   # Class Item                           Status
> >   # Power FPC 0 Power Supply 0           OK
> >   #       FPC 0 Power Supply 1           OK
> > Index: configs/r-lacrossecity-hub
> > ===================================================================
> > retrieving revision 1.108
> > diff -u -4 -r1.108 r-lacrossecity-hub
> > @@ -15,9 +15,8 @@
> >   #       FPC 0 Fan 2                    OK
> >   #       FPC 0 Fan 3                    OK
> >   #
> >   # r-lacrossecity-hub> show chassis firmware
> > - # show chassis fpc detail
> >   # Part                     Type       Version
> >   # FPC 0                    uboot      U-Boot 1.1.6 (Jun  5 2012 -
> > 02:24:53) 1.0.0
> >   #                          loader     FreeBSD/PowerPC U-Boot bootstrap
> > loader 2.4
> >   #
> > Index: configs/r-platteville-hub
> > ===================================================================
> > retrieving revision 1.274
> > diff -u -4 -r1.274 r-platteville-hub
> > @@ -1,7 +1,8 @@
> >   #RANCID-CONTENT-TYPE: juniper
> >   #
> >   # r-platteville-hub> show chassis clocks
> > + # show chassis environment
> >   # r-platteville-hub> show chassis environment
> >   # Class Item                           Status
> >   # Power FPC 0 Power Supply 0           OK
> >   #       FPC 0 Power Supply 1           OK
> >
> > Heasley, you chimed in saying the prompt may be out of sync. While I
> don't
> > quite know what that means, you suggested sending output of:
> >
> > eval `rancid -Ct juniper device`
> >
> > Here that is, finally:
> >
> > jlogin -t 120 -c 'show chassis clocks;show chassis environment;show
> chassis
> > firmware;show chassis fpc detail;show chassis hardware detail;show
> chassis
> > hardware models;show chassis routing-engine;show chassis scb;show chassis
> > sfm detail;show chassis ssb;show chassis feb detail;show chassis feb;show
> > chassis cfeb;show chassis alarms;show system license;show system
> > boot-messages;show system core-dumps;show version detail;show version
> > invoke-on other-routing-engine;show configuration;file checksum md5
> > /var/db/scripts/*/*;file list recursive /var/db/scripts/'
> r-platteville-hub
> >
> > You may notice some additions at the end which help us track some slax
> > scripts:
> >
> > file checksum md5 /var/db/scripts/*/*;file list recursive
> /var/db/scripts/'
> >
> > we've had those in place for quite some time (before this) so I'm unsure
> if
> > those are related.
>
> not likely.  I presume you have a banner with something that looks like a
> prompt; like https://www.juniper.net/documentation/software/junos/
> junos93/swconfig-system-basics/configuring-a-system-login-message.html.
> if not, you'll have to share output with me.
>
> eval `rancid -t juniper -C hostname` &> output
>
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