Famous operational issues

Justin Streiner streinerj at gmail.com
Tue Feb 23 22:22:56 UTC 2021

An interesting sub-thread to this could be:

Have you ever unintentionally crashed a device by running a perfectly
innocuous command?
1. Crashed a 6500/Sup2 by typing "show ip dhcp binding".
2. "clear interface XXX" on a Nexus 7K triggered a cascading/undocument
Sev1 bug that caused two linecards to crash and reload, and take down about
two dozen buildings on campus at the .edu where I used to work.
3. For those that ever had the misfortune of using early versions of the
"bcc" command shell* on Bay Networks routers, which was intended to make
the CLI make look and feel more like a Cisco router, you have my
condolences.  One would reasonably expect "delete ?" to respond with a list
of valid arguments for that command.  Instead, it deleted, well...
everything, and prompted an on-site restore/reboot.

BCC originally stood for "Bay Command Console", but we joked that it really
stood for "Blatant Cisco Clone".

On Tue, Feb 16, 2021 at 2:37 PM John Kristoff <jtk at dataplane.org> wrote:

> Friends,
> I'd like to start a thread about the most famous and widespread Internet
> operational issues, outages or implementation incompatibilities you
> have seen.
> Which examples would make up your top three?
> To get things started, I'd suggest the AS 7007 event is perhaps  the
> most notorious and likely to top many lists including mine.  So if
> that is one for you I'm asking for just two more.
> I'm particularly interested in this as the first step in developing a
> future NANOG session.  I'd be particularly interested in any issues
> that also identify key individuals that might still be around and
> interested in participating in a retrospective.  I already have someone
> that is willing to talk about AS 7007, which shouldn't be hard to guess
> who.
> Thanks in advance for your suggestions,
> John
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