Dns Lookup - Cisco TelePresence Administrator's Manual
Video communication server
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Also See for TelePresence:
- Administrator's manual (507 pages) ,
- Manual (24 pages) ,
- Specifications (7 pages)
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TTL
(Time to Live). This is the hop count of the request, showing the sequential number the router.
Response This shows the IP address of the router, and the time taken (in ms) to respond to each packet
received from the VCS.
*** indicates that the router did not respond to the request.
The route taken between the VCS and a particular host may vary for each Traceroute request.
DNS lookup
The
DNS lookup
tool
(Maintenance > Tools > Network utilities > DNS
troubleshooting system issues.
It allows you to query DNS for a supplied hostname and display the results of the query if the lookup was
successful.
To use this tool:
1. In the Host field, enter either:
the name of the host you want to query, or
l
an IPv4 or IPv6 address if you want to perform a reverse DNS lookup
l
2. In the Query type field, select the type of record you want to search for:
(for reverse lookups the Query type is ignored - the search automatically looks for PTR records)
Option
All
A (IPv4 address)
AAAA (IPv6 address)
SRV (SIP and H.323 servers) SRV records (which includes those specific to either H.323 or SIP servers, see
NAPTR (Name authority
pointer)
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"):
If the supplied Host is fully qualified:
n
DNS is queried first for Host
l
If the lookup for Host fails, then an additional query for Host.<system_domain> is performed (where
l
<system_domain> is the Domain name as configured on the
If the supplied Host is not fully qualified:
n
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
l
Cisco VCS Administrator Guide (X7.1)
Searches for...
any type of record
a record that maps the hostname to the host's IPv4 address
a record that maps the hostname to the host's IPv6 address
below).
a record that rewrites a domain name (into a URI or other domain name for
example).
lookup) can be used to assist in
DNS
page)
Page 299 of 479
Maintenance
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