Is there a way to set the timeout on a bad connection? When watching tcpdump on the two IPs, I did not see my squid instance try the other IP automatically. I had to refresh my web browser connection multiple times. This also indicates some DNS caching persistence. Are there other DNS settings that can improve this behavior? Thanks for your tips. > On Monday, November 21, 2016 11:54 PM, Garri Djavadyan <garryd@xxxxxxxxx> wrote: > > On Tue, 2016-11-22 at 03:59 +0000, Jiann-Ming Su wrote: > >> If a website has two (or more) IP addresses, and the TCP connection >> to one of them fails, can squid3 be configured to try the other IP >> address(es)? > > Hi, > > The behavior you described is default for Squid. For example, you can > set 'debug_options ALL,1 14,9' to confirm it: > > 2016/11/22 09:47:50.426 kid1| 14,3| ipcache.cc(433) ipcacheParse: > ipcacheParse: mail.ru #0 [2a00:1148:db00:0:b0b0::1] > 2016/11/22 09:47:50.426 kid1| 14,3| ipcache.cc(422) ipcacheParse: > ipcacheParse: mail.ru #1 94.100.180.199 > 2016/11/22 09:47:50.426 kid1| 14,3| ipcache.cc(422) ipcacheParse: > ipcacheParse: mail.ru #2 94.100.180.201 > 2016/11/22 09:47:50.426 kid1| 14,3| ipcache.cc(422) ipcacheParse: > ipcacheParse: mail.ru #3 217.69.139.199 > 2016/11/22 09:47:50.426 kid1| 14,3| ipcache.cc(422) ipcacheParse: > ipcacheParse: mail.ru #4 217.69.139.200 > 2016/11/22 09:47:50.426 kid1| 14,9| comm.cc(646) comm_connect_addr: > connecting to: [2a00:1148:db00:0:b0b0::1]:80 > 2016/11/22 09:47:50.427 kid1| 14,2| ipcache.cc(924) ipcacheMarkBadAddr: > ipcacheMarkBadAddr: mail.ru [2a00:1148:db00:0:b0b0::1]:80 > 2016/11/22 09:47:50.427 kid1| 14,3| ipcache.cc(889) ipcacheCycleAddr: > ipcacheCycleAddr: mail.ru now at 94.100.180.199 (2 of 5) > 2016/11/22 09:47:50.427 kid1| 14,9| comm.cc(646) comm_connect_addr: > connecting to: 94.100.180.199:80 > 2016/11/22 09:48:50.036 kid1| 14,2| ipcache.cc(924) ipcacheMarkBadAddr: > ipcacheMarkBadAddr: mail.ru 94.100.180.199:80 > 2016/11/22 09:48:50.036 kid1| 14,3| ipcache.cc(889) ipcacheCycleAddr: > ipcacheCycleAddr: mail.ru now at 94.100.180.201 (3 of 5) > 2016/11/22 09:48:50.036 kid1| 14,9| comm.cc(646) comm_connect_addr: > connecting to: 94.100.180.201:80 > 2016/11/22 09:49:50.091 kid1| 14,2| ipcache.cc(924) ipcacheMarkBadAddr: > ipcacheMarkBadAddr: mail.ru 94.100.180.201:80 > 2016/11/22 09:49:50.091 kid1| 14,3| ipcache.cc(889) ipcacheCycleAddr: > ipcacheCycleAddr: mail.ru now at 217.69.139.199 (4 of 5) > 2016/11/22 09:49:50.092 kid1| 14,9| comm.cc(646) comm_connect_addr: > connecting to: 217.69.139.199:80 > 2016/11/22 09:50:50.152 kid1| 14,2| ipcache.cc(924) ipcacheMarkBadAddr: > ipcacheMarkBadAddr: mail.ru 217.69.139.199:80 > 2016/11/22 09:50:50.153 kid1| 14,3| ipcache.cc(889) ipcacheCycleAddr: > ipcacheCycleAddr: mail.ru now at 217.69.139.200 (5 of 5) > 2016/11/22 09:50:50.153 kid1| 14,9| comm.cc(646) comm_connect_addr: > connecting to: 217.69.139.200:80 > > > Garri > _______________________________________________ > squid-users mailing list > squid-users@xxxxxxxxxxxxxxxxxxxxx > http://lists.squid-cache.org/listinfo/squid-users > _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users
