On Tue, 6 Sep 2011, Mark Tinka wrote:
Personally, I don't mind the lack of ISSU. There is no way I'm going to trust that things will go well even when ISSU is supported, so we'll always be running upgrades during outage windows, and not using ISSU just to be sure.
There is also the question about what "ISSU" is. For me, it should be hitless or at least sub 50ms traffic hit. As far as I know, none of the router manufacturers come even close to this, even when they're talking about the future.
Multiple seconds outage is not "in service".
The worst thing issue I have with IOS XR upgrades is the amount of time it takes to run the patch. Even an SMU can take decades, especially if it needs to reload the line cards/fabric. It's really annoying - almost 1.5hrs upgrading a single box.
Yes, it's a nightmare.
But, I hear there are plans to significantly reduce the upgrades times in upcoming code. Not sure if you need the new RP's or if the current ones will do.
Well, "significantly" in this case is not the "order of magnitude" improvement that I feel is needed to make this good.
-- Mikael Abrahamsson email: [email protected] _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
