Hello, from squid3.0's config file (squid.conf.default): # use 'background-ping' to only send ICP queries to this # neighbor infrequently. This is used to keep the neighbor # round trip time updated and is usually used in # conjunction with weighted-round-robin. If I use it in reverse proxy, the parent is a realserver, then I can't use "background-ping" and "weighted-round-robin", is it? Since realserver doesn't accept ICP queries. Thanks.