My site was running well for the past three years. Recently Googlebot's request my server got increased. and at one time I got network unreachable error. When I contacted my hosting company they asked suggestions from me and I gave a list of Google ips to white list. They said that their server will block IPs which request huge numbers of pages.
After that my site appeared well in Google. Now after a month, I get "network unreachable" reported in Google Webmaster Tools. When I inquired to my host, they said I have to change my plan from shared hosting to a VPS account or a dedicated hosting.
I have 300 links indexed by Google. Previously the crawl rate was default and now I reduced to the one shown in the picture. Will this affect my indexing in Google?
Will my host block Google IPs for the new lowered crawl rate? I have 300 links indexed and they irresponsible say that I have to switch over to vps.