Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 10 – NAPTR records
Cisco VCS Deployment Guide: Cluster creation and maintenance (Cisco VCS X7.0.n)
Page 62 of 63
Looking up a domain NAPTR record
Example: NAPTR record allowing E20 endpoints to detect that they are in the public (external)
network.
network.
~ # dig -t NAPTR example.com
; <<>> DiG 9.4.1 <<>> -t NAPTR example.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1895
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 6, ADDITIONAL: 4
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1895
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 6, ADDITIONAL: 4
;; QUESTION SECTION:
;example.com. IN NAPTR
;example.com. IN NAPTR
;; ANSWER SECTION:
example.com. 2 IN NAPTR 50 50 "se" "SIPS+D2T" "" _sips._tcp.example.com.
example.com. 2 IN NAPTR 90 50 "se" "SIP+D2T" "" _sip._tcp.example.com.
example.com. 2 IN NAPTR 100 50 "se" "SIP+D2U" "" _sip._udp.example.com.
example.com. 2 IN NAPTR 50 50 "se" "SIPS+D2T" "" _sips._tcp.example.com.
example.com. 2 IN NAPTR 90 50 "se" "SIP+D2T" "" _sip._tcp.example.com.
example.com. 2 IN NAPTR 100 50 "se" "SIP+D2U" "" _sip._udp.example.com.
;; AUTHORITY SECTION:
example.com. 320069 IN NS nserver2.example.com.
example.com. 320069 IN NS nserver.euro.example.com.
example.com. 320069 IN NS nserver.example.com.
example.com. 320069 IN NS nserver3.example.com.
example.com. 320069 IN NS nserver4.example.com.
example.com. 320069 IN NS nserver.asia.example.com.
example.com. 320069 IN NS nserver2.example.com.
example.com. 320069 IN NS nserver.euro.example.com.
example.com. 320069 IN NS nserver.example.com.
example.com. 320069 IN NS nserver3.example.com.
example.com. 320069 IN NS nserver4.example.com.
example.com. 320069 IN NS nserver.asia.example.com.
;; ADDITIONAL SECTION:
nserver.example.com. 56190 IN A 17.111.10.50
nserver2.example.com. 57247 IN A 17.111.10.59
nserver3.example.com. 57581 IN A 17.22.14.50
nserver4.example.com. 57452 IN A 17.22.14.59
nserver.example.com. 56190 IN A 17.111.10.50
nserver2.example.com. 57247 IN A 17.111.10.59
nserver3.example.com. 57581 IN A 17.22.14.50
nserver4.example.com. 57452 IN A 17.22.14.59
;; Query time: 11 msec
;; SERVER: 10.44.8.11#53(10.44.8.11)
;; WHEN: Tue Jul 13 17:08:40 2010
;; MSG SIZE rcvd: 385
;; SERVER: 10.44.8.11#53(10.44.8.11)
;; WHEN: Tue Jul 13 17:08:40 2010
;; MSG SIZE rcvd: 385
~ #