When I dig this: dig s1.mytest.blogchina.org +trace
I got many these info: mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 183.60.59.217#53(ns1.dnsv5.com) in 6 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 112.90.143.36#53(ns1.dnsv5.com) in 116 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 180.153.162.153#53(ns2.dnsv5.com) in 27 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 221.130.12.61#53(ns2.dnsv5.com) in 165 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 122.225.217.194#53(ns2.dnsv5.com) in 24 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. What does this death loop mean? How it happened? Thanks. _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users