Hello, I've configured two squid hosts for hierarchy on accelerator mode,one is parent,another is child. The main config of the child squid is: http_port 80 vhost cache_peer 192.168.0.210 parent 80 3130 icp_port 3130 query_icmp on hierarchy_stoplist cgi-bin \.php acl all src 0.0.0.0/0.0.0.0 icp_access deny all never_direct allow all The main config for the parent is: http_port 80 vhost icp_port 3130 icp_hit_stale on hierarchy_stoplist cgi-bin \.php acl localnet src 192.168.0.0/24 icp_access allow localnet icp_access deny all The squid version and compile info are shown as below: Squid Cache: Version 2.6.STABLE5 configure options: '--prefix=/home/squid' '--enable-async-io=32' '--enable-removal-policies=heap,lru' '--with-maxfd=65535' '--enable-epoll' '--enable-snmp' '--disable-cache-digests' '--disable-poll' '--disable-ident-lookup' '--disable-wccp' '--disable-select' '--enable-dlmalloc' '--enable-referer-log' '--enable-large-files' '--enable-icmp' When Squid started,I saw the errors in the cache.log: 2006/12/27 10:46:24| icmpSend: send: (111) Connection refused 2006/12/27 10:46:24| Closing Pinger socket on FD 17 and lots of these info in access.log: TIMEOUT_FIRST_UP_PARENT/192.168.0.210 It seems my squid's hierarchy config is wrong.Please helps,thank you.