daniel.dawalibi at idm.net.lb
Tue Aug 28 09:13:28 UTC 2007
I have 2 caching DNS servers.
When query a domain through dig command it takes a long time to resolving;
sometimes the Total query time exceed 12000 ms as shown below
I would like to note that we don't have a connection problem, or packet
Could anyone help to know the reason of this delay in resolving and how we
can reduce it to a few milliseconds?
# dig www.yofo.com
; <<>> DiG 8.3 <<>> www.yofo.com
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2
;; QUERY SECTION:
;; www.yofo.com, type = A, class = IN
;; ANSWER SECTION:
www.yofo.com. 4H IN CNAME yofo.com.
yofo.com. 4H IN A 22.214.171.124
;; AUTHORITY SECTION:
yofo.com. 4H IN NS dns.created.com.
yofo.com. 4H IN NS dns2.created.com.
;; ADDITIONAL SECTION:
dns.created.com. 1d23h55m59s IN A 126.96.36.199
dns2.created.com. 1d23h55m59s IN A 188.8.131.52
;; Total query time: 12636 msec
;; FROM: ns to SERVER: default -- 127.0.0.1
;; WHEN: Tue Aug 28 12:07:15 2007
;; MSG SIZE sent: 30 rcvd: 137
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