Cisco Cisco Expressway Manuel De Maintenance
Option
Searches for...
AAAA (IPv6 address)
a record that maps the hostname to the host's IPv6 address
SRV (services)
SRV records (which includes those specific to H.323, SIP, Unified Communications
and TURN services, see below)
and TURN services, see below)
NAPTR (Name
authority pointer)
authority pointer)
a record that rewrites a domain name (into a URI or other domain name for example)
3. Click Lookup.
A separate DNS query is performed for each selected Query type. The domain that is included within the
query sent to DNS depends upon whether the supplied Host is fully qualified or not (a fully qualified host
name contains at least one "dot"):
query sent to DNS depends upon whether the supplied Host is fully qualified or not (a fully qualified host
name contains at least one "dot"):
n
If the supplied Host is fully qualified:
l
DNS is queried first for Host
l
If the lookup for Host fails, then an additional query for Host.<system_domain> is performed (where
<system_domain> is the Domain name as configured on the
<system_domain> is the Domain name as configured on the
DNS
page)
n
If the supplied Host is not fully qualified:
l
DNS is queried first for Host.<system_domain>
l
If the lookup for Host.<system_domain> fails, then an additional query for Host is performed
For SRV record type lookups, multiple DNS queries are performed. An SRV query is made for each of the
following _service._protocol combinations:
following _service._protocol combinations:
n
_h323ls._udp.<domain>
n
_h323rs._udp.<domain>
n
_h323cs._tcp.<domain>
n
_sips._tcp.<domain>
n
_sip._tcp.<domain>
n
_sip._udp.<domain>
n
_collab-edge._tls
n
_collab-edge._tcp
n
_cuplogin._tcp
n
_cisco-uds._tcp
n
_turn._udp.<domain>
In each case, as for all other query types, either one or two queries may be performed for a <domain> of
either Host and/or Host.<system_domain>.
either Host and/or Host.<system_domain>.
Results
A new section will appear showing the results of all of the queries. If successful, it will display the following
information:
information:
Query
type
type
The type of query that was sent by the Expressway.
Name
The hostname contained in the response to the query.
Cisco Expressway Administrator Guide (X8.1.1)
Page 204 of 343
Maintenance
Network utilities