Configuring Dns Servers For Enum And Uri Dialing - Cisco TelePresence Administrator's Manual

flag determines the interpretation of the other fields in this record. Only the value u (indicating that this is
n
a terminal rule) is currently supported, and this is mandatory.
service states whether this record is intended to describe E.164 to URI conversion for H.323 or for SIP.
n
Its value must be either E2U+h323 or E2U+SIP.
regex is a regular expression that describes the conversion from the given E.164 number to an H.323 or
n
SIP URI.
replacement is not currently used by the VCS and should be set to . (the full stop character).
n
Non-terminal rules in ENUM are not currently supported by the VCS. For more information on these, see
section 2.4.1 of RFC 3761.
For example, the record:
IN NAPTR 10 100 "u" "E2U+h323" "!^(.*)$!h323:\1@example.com!" .
would be interpreted as follows:
10 is the order
n
100 is the preference
n
u is the flag
n
E2U+h323 states that this record is for an H.323 URI
n
!^(.*)$!h323:\1@example.com! describes the conversion:
n
! is a field separator
l
the first field represents the string to be converted. In this example, ^(.*)$ represents the entire E.164
l
number
the second field represents the H.323 URI that will be generated. In this example,
l
h323:\1@example.com states that the E.164 number will be concatenated with @example.com. For
example, 1234 will be mapped to 1234@example.com.
. shows that the replacement field has not been used.
n

Configuring DNS servers for ENUM and URI dialing

DNS servers are required to support ENUM and URI dialing:
ENUM dialing: to query for NAPTR records that map E.164 numbers to URIs
n
URI dialing: to look up endpoints that are not locally registered or cannot be accessed via neighbor
n
systems
To configure the DNS servers used by the VCS for DNS queries:
1. Go to the DNS page (System >
2. Enter in the Address 1 to Address 5 fields the IP addresses of up to 5 DNS servers that the VCS will
query when attempting to locate a domain. These fields must use an IP address, not a FQDN.
Cisco VCS Administrator Guide (X7.2)
DNS).
Dial plan and call processing
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