Make sure your "mywebserver.com" is reachable from netapp
you can use "network ping" command to make sure its reachable from cluster. (cluster shell)
if you dont have a HTTP server you can use "hfs http server) (http://www.rejetto.com/hfs/?f=dl)
its a self exceutable.. easiest way to setup a http server.
I'm actually in the middle of an upgrade..
this is what i use.
system image get -node * -package http://172.17.69.112/NetApp/91P1_q_image.tgz
system image update -node node-01 -package 91P1_q_image.tgz -setdefault true
system image update -node node-02 -package 91P1_q_image.tgz -setdefault true
then takeover giveback one by one..
thanks,
Robin.