In Squid, neighbor usually means the same thing as peer. A neighbor cache is one that you have defined with the cache_host configuration option. Neighbor refers to either a parent or a sibling.
In Harvest 1.4, neighbor referred to what Squid calls a sibling. That is, Harvest had parents and neighbors. For backward compatability, the term neighbor is still accepted in some Squid configuration options.
$Id: FAQ.sgml,v 1.77 1999/07/23 16:54:10 wessels Exp $