Configuring Quality Of Service Settings - Cisco TelePresence Administrator's Manual

Network and system settings
You can specify redundant per-domain servers by adding an additional per-domain DNS server address and
associating it with the same Domain names. In this scenario, DNS requests for those domains will be sent
in parallel to both DNS servers.
Tip: you can also use the DNS lookup tool (Maintenance > Tools > Network utilities > DNS lookup) to
check which domain name server (DNS server) is responding to a request for a particular hostname.

Configuring Quality of Service settings

The Quality of Service (QoS) page (System > Quality of Service) is used to 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.
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.
Cisco VCS Administrator Guide (X7.1) Page 64 of 479