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The Lounge War Stories How not to install fibre links between data centres! Post 302686933 by gull04 on Wednesday 15th of August 2012 04:49:57 PM
Old 08-15-2012
How not to install fibre links between data centres!

Hi Folks,

A couple of years ago we had to replace the core switches between two of our data centres, a simple task for the most part - these new switches would be state of the art Cisco Catalyst units.

The link between the two sites was a dark fibre, with 8Gb bandwidth running full duplex over a redundant cable pair. It was quite a surprise when we started to tidy up the cables to find this - see the attached images.

The cables comprised two male to male cables, with the ends joined with Bluetack. I'm amazed that it worked for so long. - Actually I'm amazed it worked at all!

Regards

Dave
How not to install fibre links between data centres!-bluetack_fairyjpg
How not to install fibre links between data centres!-bluetack_fairy_againjpg

Last edited by gull04; 08-15-2012 at 09:33 PM..
 

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rancid(1)						      General Commands Manual							 rancid(1)

NAME
rancid - Cisco configuration filter SYNOPSIS
rancid [-dlV] (-f filename | hostname) DESCRIPTION
rancid is a perl(1) script which uses the login scripts (see clogin(1)) to login to a device, execute commands to display the configuration, etc, then filters the output for formatting, security, and so on. rancid's product is a file with the name of it's last argument plus the suffix .new. For example, hostname.new. There are complementary scripts for other platforms and/or manufacturers that are supported by rancid(1). Briefly, these are: agmrancid Cisco Anomaly Guard Module (AGM) arancid Alteon WebOS switches arrancid Arista Networks devices brancid Bay Networks (nortel) cat5rancid Cisco catalyst switches cssrancid Cisco content services switches erancid ADC-kentrox EZ-T3 mux f10rancid Force10 f5rancid F5 BigIPs fnrancid Fortinet Firewalls francid Foundry and HP procurve OEMs of Foundry hrancid HP Procurve Switches htranicd Hitachi Routers jerancid Juniper Networks E-series jrancid Juniper Networks mrancid MRTd mrvrancid MRV optical switches mtrancid Mikrotik routesrs nrancid Netscreen firewalls nsrancid Netscaler nxrancid Cisco Nexus boxes prancid Procket Networks rivrancid Riverstone rrancid Redback srancid SMC switch (some Dell OEMs) trancid Netopia sDSL/T1 routers tntrancid Lucent TNT xrancid Extreme switches xrrancid Cisco IOS-XR boxes zrancid Zebra routing software The command-line options are as follows: -V Prints package name and version strings. -d Display debugging information. -l Display somewhat less debugging information. -f rancid should interpret the next argument as a filename which contains the output it would normally collect from the device ( hostname) with clogin(1). SEE ALSO
control_rancid(1), clogin(1), rancid.conf(5) CAVEATS
Cisco IOS offers a DHCP server that maintains a text database which can be stored remotely or on local storage. If stored locally, the file changes constantly and causes constant diffs from rancid. If this file's name ('ip dhcp database') matches the regex dhcp_[^[:space:].].txt, it will be filtered. For Catalyst switches running CatOS, type cat5, the prompt must end with '>'. clogin(1) looks for '>' to determine when a login is successful. For example: cat5k> cat5k> enable Password: cat5k> (enable) rancid works on Cisco Catalyst 1900 series switches that are running Enterprise Edition software. This software provides a menu at connection time that allows a command line interface to be used by entering 'K' at the prompt. 26 April 2011 rancid(1)
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