Upgrading from #Varnish 2.1 to 3.0
►https://www.varnish-cache.org/docs/trunk/installation/upgrade.html
Upgrading from Varnish 2.1 to 3.0
This is a compilation of items you need to pay attention to when upgrading from Varnish 2.1 to 3.0
Changes to VCL
In most cases you need to update your VCL since there has been some changes to the syntax.