[149095] in North American Network Operators' Group

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Re: juniper mx80 vs cisco asr 1000

daemon@ATHENA.MIT.EDU (Mark Tinka)
Sat Jan 28 00:56:32 2012

From: Mark Tinka <mtinka@globaltransit.net>
To: Randy Bush <randy@psg.com>
Date: Sat, 28 Jan 2012 13:55:37 +0800
In-Reply-To: <m2sjj05qn5.wl%randy@psg.com>
Cc: North American Network Operators' Group <nanog@nanog.org>
Reply-To: mtinka@globaltransit.net
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

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On Saturday, January 28, 2012 01:42:54 PM Randy Bush wrote:

> my fear is that issu is a very complex hack to cover that
> it takes a week to boot the turkey.  and adding more
> complexity will not make things better in the long run,
> probably worse in fact.

True, and also to (well, in theory, anyway) not have to=20
reload the box to launch new images in order to avoid any=20
kind of downtime (even with a fixed boot process).

The problem with ISSU is that it requires specific support=20
across specific protocols, features and hardware in the=20
router, which invariably means having to run the latest code=20
that supports the features you feel need ISSU, and/or the=20
latest hardware that meets the ISSU requirements per the=20
vendor (it's like chasing your own tail).

Since we schedule all maintenance in a maintenance window=20
anyway (whether it's service-impacting or not), I see no=20
point for ISSU. But to each their own.

Mark.

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