Cisco TelePresence Administrator's Manual page 459

Reference material
Command reference — xConfiguration
Zones Zone [1..1000] DNS SIP Poison Mode: <On/Off>
Determines whether SIP requests sent out to this zone will be "poisoned" such that if they are received by the local VCS again they will
be rejected. Default: Off .
On: SIP requests sent out via this zone that are received again by this VCS will be rejected.
Off: SIP requests sent out via this zone that are received by this VCS again will be processed as normal.
Example: xConfiguration Zones Zone 1 DNS SIP Poison Mode: Off
Zones Zone [1..1000] DNS SIP Record Route Address Type: <IP/Hostname>
Controls whether the VCS uses its IP address or host name in the record-route or path headers of outgoing SIP requests to this
zone. Note: setting this value to Hostname also requires a valid DNS system host name to be configured on the VCS. Default: IP.
Example: xConfiguration Zones Zone 1 DNS SIP Record Route Address Type: IP
Zones Zone [1..1000] DNS SIP SDP Attribute Line Limit Length: <80..65535>
If SIP SDP attribute line limit mode is set to On, sets the maximum line length of a=fmtp SDP lines. Default: 130 .
Example: xConfiguration Zones Zone 1 DNS SIP SDP Attribute Line Limit Length: 130
Zones Zone [1..1000] DNS SIP SDP Attribute Line Limit Mode: <On/Off>
Determines whether requests containing SDP sent out to this zone will have the length of a=fmtp lines restricted.
On: the length will be truncated to the maximum length specified by the SIP SDP attribute line limit length setting.
Off: the length will not be truncated.
Example: xConfiguration Zones Zone 1 DNS SIP SDP Attribute Line Limit Mode: Off
Zones Zone [1..1000] DNS SIP SearchAutoResponse: <On/Off>
Controls what happens when the VCS receives a SIP search that originated as an H.323 search, destined for this zone. Default: Off .
Off: a SIP OPTION message will be sent to the zone.
On: searches will be responded to automatically, without being forwarded to the zone.
Example: xConfiguration Zones Zone 1 DNS SIP SearchAutoResponse: Off
Zones Zone [1..1000] DNS SIP TLS Verify Mode: <On/Off>
Controls X.509 certificate checking between this VCS and the destination system server returned by the DNS lookup. When enabled,
the domain name submitted to the DNS lookup must be contained within the server's X.509 certificate (in either the Subject Common
Name or the Subject Alternative Name attributes). Default: Off .
Example: xConfiguration Zones Zone 1 DNS SIP TLS Verify Mode: On
Zones Zone [1..1000] DNS SIP TLS Verify Subject Name: <S: 0..128>
The certificate holder's name to look for in the traversal client's X.509 certificate (must be in either the Subject Common Name or the
Subject Alternative Name attributes). If empty then the domain portion of the resolved URI is used.
Example: xConfiguration Zones Zone 1 DNS SIP TLS Verify Subject Name: "example.com"
Zones Zone [1..1000] DNS SIP UDP BFCP Filter Mode: <On/Off>
Determines whether INVITE requests sent to this zone filter out UDP/BFCP. This option may be required to enable interoperability
with SIP devices that do not support the UDP/BFCP protocol. Default: Off .
On: any media line referring to the UDP/BFCP protocol is replaced with TCP/BFCP and disabled.
Off: INVITE requests are not modified.
Example: xConfiguration Zones Zone 1 DNS SIP UDP BFCP Filter Mode: Off
Cisco VCS Administrator Guide (X8.1.1) Page 459 of 507