Anthony, Amos, The 2 squid are kid/parent each of them (both sibling). So, when one aks the second, they play the role of kid -> parent, am I right ? Here is the way: Squid1 checks the Squid2 and gets that: ... user-ip TCP_MISS/504 708 GET http://code.jquery.com/ui/1.10.3/jquery-ui.js - CD_SIBLING_HIT/10.1.1.2 ... Squid2 replies that to the Squid1: ... squid1-ip TCP_MISS/504 478 GET http://code.jquery.com/ui/1.10.3/jquery-ui.js - HIER_NONE/- text/html I did many wget with "unavailable" objects from both squid servers, i can get the objects correctly. I'll disable the sibling to check if we still have TCP_MISS/504, keep you posted... As the 2 squid are in production at the ISP datacenter, not sure I could apply a debug... They do have the same route connected to 2 mikrotik (squid1 -> mikrotik1, squid 2 -> mikrotik2), both mikrotik connected to the same cisco router. Mangles/DNS/Gateway on mikrotiks are the same. Fred. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/TCP-MISS-504-in-cache-peer-tp4671944p4671962.html Sent from the Squid - Users mailing list archive at Nabble.com. _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users