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 reload the box to launch new images in order to avoid any kind of downtime (even with a fixed boot process). The problem with ISSU is that it requires specific support across specific protocols, features and hardware in the router, which invariably means having to run the latest code that supports the features you feel need ISSU, and/or the latest hardware that meets the ISSU requirements per the vendor (it's like chasing your own tail). Since we schedule all maintenance in a maintenance window anyway (whether it's service-impacting or not), I see no point for ISSU. But to each their own. Mark.