Hi all, I'm running Windows based multi instance Squid with multi interface connected to different ISP for load balancing. The configuration is like below. Squid Main http_port <my network interface>:8080 icp_port 3130 tcp_outgoing_adderss <my network interface> Squid Parent A http_port <my network interface>:8081 icp_port 3131 tcp_outgoing_adderss <ISP A interface> Squid Parent B http_port <my network interface>:8082 icp_port 3132 tcp_outgoing_adderss <ISP B interface> Users -> Main Squid -(Round Robbin Parent)-> Squid Parent A/B -(Direct)-> ISP A/B -> Internet The performance is very bad and sometime Squid Parent B was hang (service was stopped) with "Loop" related log on Cache.Log. I didn't see CPU and RAM exhausting and the HD queue was low enough. Any suggestion with my problem ? Best regards. -- Lazuardi Nasution Laboratorium Sistem Kendali & Komputer LABTEK 8 Lantai 2 ITB Ganesha 10 Bandung 40132 +628122142597 +622291230584