Tag Name icp_hit_stale
Usage icp_hit_stale on|off

Description
If you want to return ICP_HIT for stale cache objects, set this option to ‘on’. If you have sibling relationships with caches in other administrative domains, this should be ‘off’. If you only have sibling relationships with caches under your control, then it is probably okay to set this to ‘on’

Default icp_hit_stale off