Re: Quick question.

["Alexei Roudnev" <alex () relcom net>]

We had 6509 which failed, because backplain failed (it can not happen -:)
but it happen) - iof course, no any 'dual CPU dual power' could prevent
it... Image broken line card - it can crash whole box no matter how much
'dual' things you have. The same with software error (I crashed one of 6509
just running 'snmpwalk' on it).

So, I always prefer to have 2 boxes and application level reliaility instead
of playing with 'dual everything' solutions (last example - 2 days ago one
of our dual-power Intel servers failed because of 1 power supply failure -
it did not broke, but it did something wrong''' and system crashed...).

Fortunately, 6509 reliability is very high and you must found someone wioth
thousands of 65xx to answer your question...

----- Original Message ----- 
From: "RAMARAJAN, ARVIND, ALABS" <aramarajan () att com>
To: "Vish Yelsangikar" <vyelsangikar () netflix com>; "Nanog" <nanog () nanog org>
Sent: Thursday, July 29, 2004 10:26 AM
Subject: RE: Quick question.




Maybe it is something to do with the following Cisco Field Notice:

Message Type : Field Notice

Title: Cisco Field Notice: Cat6xxx Switches And 76xx Series Routers Running
A Sup2 With CatOS Versions 7.6(1)
Through 7.6(4) May Hang After Running For A Period Of Time
URL:
http://www.cisco.com/en/US/customer/products/hw/switches/ps700/products_field_notice09186a008026758e.shtml

Posted: July 27, 2004

Summary: Cat6xxx Switches and 76xx Series Routers running a Sup2 with CatOS
versions 7.6(1) through 7.6(4)
may hang after running for a period of time.

-----Original Message-----
From: owner-nanog () merit edu [mailto:owner-nanog () merit edu]On Behalf Of
Vish Yelsangikar
Sent: Thursday, July 29, 2004 12:57 AM
To: Nanog
Subject: Quick question.



Sorry for the spam.  I am trying to find this info, but can't find it
anywhere. So posting my question to a wide and experienced audience.

What are the chances of dual Sup 6500 chassis going down completely for
whatever reason in general or hardware failure in particular. Anyone has
MTBF for 6500 with dual everything (power supply, sup)?

You may reply to me off list.

Thanks.

Vish.