On 02/11/2010 07:48 PM, Randy McAnally wrote:
Thanks for that information.
What is the 'least problematic' method, step by step, to upgrade from SXF to
SXI since I have dual sups? I can handle a single reboot but don't want to
whack any config or cause the sups to lose redundancy or need multiple or
extended downtimes.
Load the firmware onto both sup, change the boot statement, reload the
standby sup and it will come up in RPR mode. Force a switchover, the new
sup will finish booting & reload the linecards.
We do this for almost all our software upgrades, and the outage it
typically in the region of 90 seconds. There's nothing special in this
regard about going to SXI - this is how we did it.
It's worth noting that AFAICT ISSU requires the linecards to have
sufficient RAM to pre-load the new IOS image, and many standard
linecards e.g. 6748-SFP/DFC-3B do not, and will therefore not do a
"fast" ISSU. It's also relevant that for ISSU the old and new images
have to be "compatible" and I have my doubts how often that will be the
case...
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