Cisco TelePresence Administrator's Manual page 434

Reference material
Command reference — xConfiguration
Interworking Encryption Replay Protection Mode: <On/Off>
Controls whether the VCS will perform replay protection for incoming SRTP packets when interworking a call. Default: Off.
On: replayed SRTP packets will be dropped by the VCS.
Off: the VCS will not check for replayed SRTP packets.
Example: xConfiguration Interworking Encryption Replay Protection Mode: Off
Interworking Mode: <On/Off/RegisteredOnly>
Determines whether or not the VCS will act as a gateway between SIP and H.323 calls. Default: RegisteredOnly.
Off: the VCS will not act as a SIP-H.323 gateway.
On: the VCS will act as SIP-H.323 gateway regardless of whether the endpoints are locally registered.
RegisteredOnly: the VCS will act as a SIP-H.323 gateway but only if at least one of the endpoints is locally registered.
Example: xConfiguration Interworking Mode: On
Interworking Require Invite Header Mode: <On/Off>
Controls whether the SIP to H.323 interworking function sends com.tandberg.sdp.duo.enable and com.tandberg.sdp.bfcp.udp in
the require header for dialog forming INVITEs. Default: Off.
Example: xConfiguration Interworking Require Invite Header Mode: Off"
IP DNS Domain Name: <S: 0, 128>
The name to be appended to an unqualified host name before querying the DNS server. Used when attempting to resolve
unqualified domain names for NTP, LDAP, external manager and remote syslog servers. May also be used along with the System
host name to identify references to this VCS in SIP messaging.
Example: xConfiguration IP DNS Domain Name: "example.com"
IP DNS Hostname : <S: 0, 63>
The DNS host name that this system is known by. This is not the fully-qualified domain name, just the host label portion. The name
can only contain letters, digits, hyphens and underscores. The first character must be a letter and the last character must be a letter or
a digit.
Example: xConfiguration IP DNS Hostname: "localsystem"
IP DNS MaxPort: <1024..65535>
The upper source port in the range used for sending DNS queries. Requests choose a random port from this range. Warning: setting
a small source port range increases your vulnerability to DNS spoofing attacks. Default: 65535.
Example: xConfiguration IP DNS MaxPort: 65535
IP DNS MinPort: <1024..65535>
The lower source port in the range used for sending DNS queries. Requests choose a random port from this range. Warning: setting
a small source port range increases your vulnerability to DNS spoofing attacks. Default: 1024.
Example: xConfiguration IP DNS MinPort: 1024
IP DNS UseEphemeralPortRange: <On/Off>
Determines whether outgoing DNS queries use the system's normal ephemeral port range, or a custom port range that you can
configure. Default: On.
Example: xConfiguration IP DNS UseEphemeralPortRange: On
IP Ephemeral PortRange End: <1024..65534>
The highest port in the range used for ephemeral outbound connections not otherwise constrained by VCS call processing. Default:
35999.
Example: xConfiguration IP Ephemeral PortRange End: 35999
Cisco VCS Administrator Guide (X8.1.1) Page 434 of 507