I have performed micro code upgrades using ISSU on the Juniper platform. On Thu, Nov 8, 2012 at 4:52 PM, Kasper Adel <karim.a...@gmail.com> wrote:
> What i was asking is full ISSU, even with micro code. I assume between > Major release there will be microcode upgrade most of the time. > > > On Fri, Nov 9, 2012 at 2:48 AM, Phil <bedard.p...@gmail.com> wrote: > > > The major vendors have figured it out for the most part by moving to > > stateful synchronization between control plane modules and implementing > > non-stop routing. > > > > ALU has supported ISSU on minor releases for many years and just added > > support for major releases. > > > > The Cisco Nexus ISSU works well, I've done an upgrade on a 5K switch and > > it was completely hitless. > > > > Juniper and Cisco with the 9K have gone through some hurdles but ISSU is > > actually usable now if the software versions support it. > > > > The main remaining hurdle is updating microcode on linecards, they still > > need to be rebooted after an upgrade. > > > > Phil > > > > On Nov 8, 2012, at 6:22 PM, Kasper Adel <karim.a...@gmail.com> wrote: > > > > > Hello, > > > > > > We've been hearing about ISSU for so many years and i didnt hear that > any > > > vendor was able to achieve it yet. > > > > > > What is the technical reason behind that? > > > > > > If i understand correctly, the way it will be done would be simply to > > have > > > extra ASICs/HW to be able to build dual circuits accessing the same > > memory, > > > and gracefully switch from one to another. Is that right? > > > > > > Thanks, > > > Kim > > >
