Quality Of Service (Qos); Supported Mechanisms; Dns; About Dns Servers - Cisco TelePresence Administrator's Manual

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System configuration

Quality of Service (QoS)

The Quality of Service (QoS) page lets you configure QoS options
for outbound traffic from the VCS.
This allows the network administrator to tag all signaling and
media packets flowing through the VCS with one specific QoS
tag and hence provide the ability to prioritize video traffic over
normal data traffic. Management traffic, for example SNMP
messages, is not tagged.
To go to the Quality of Service page:
•
System configuration > Quality of Service
To configure QoS settings using the CLI:
• xConfiguration IP QoS

Supported mechanisms

The VCS supports the DiffServ (Differentiated Services)
mechanism which puts the specified Tag value in the TOS (Type
Of Service) field of the IPv4 header or TC (Traffic Class) field of
the IPv6 header.
You must save your changes and restart the system for
changes to take effect.
Overview and System
Introduction
status configuration
D14049.08
November 2010
The DNS page lets you configure the VCS's DNS servers and DNS
settings.
To go to the DNS page:
•
System configuration > DNS
To configure DNS settings using the CLI:
xConfiguration IP DNS
•

About DNS servers

You must specify at least one DNS server to be queried for
address resolution if you want to either:
•
use FQDNs (Fully Qualified Domain Names) instead of IP
addresses when specifying external addresses (for example for
LDAP and NTP servers, neighbor zones and peers)
•
use features such as URI dialing
You can specify up to 5 DNS servers. The VCS sends requests
to all configured servers in parallel taking the first result received
and discounting the rest.
This can lead to confusing behavior should local network
!
administrators, for example, deploy "split horizon" DNS
where records held on an internal, corporate, DNS server
use the same domain names but with different values to those on
the public internet - an often used tactic in corporate intranets.
Cisco VCS Zones and Clustering and
configuration neighbors peers

DNS

About DNS settings

Local host name
The Local host name defines the DNS host name that this VCS is
known by.
•
•
Domain name
The Domain name is used when attempting to resolve unqualified
server addresses (for example "ldap" or "ldap_server"). It is
appended to the unqualified server address before the query is
sent to the DNS server. If the server address is fully qualified
or ENUM dialing
(for example "ldap.server") or is in the form of an IP address,
the domain name is not appended to the server address before
querying the DNS server.
It applies only to the following configuration settings in the VCS:
•
•
•
•
You are recommended to use an IP address or FQDN (Fully
Qualified Domain Name) for all server addresses.
The DNS Domain name plays no part in URI dialing.
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It must be unique for each peer in a cluster.
It is used to identify the VCS on a remote log server (a default
name of "TANDBERG" is used if the Local host name is not
specified).
LDAP server
NTP server
External Manager server
Remote logging server
Note that the FQDN of the VCS is the Local host name
plus the Domain name.
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