Cisco Unified Communications Manager SIP Profile Configuration Parameters for Intercluster Trunk

BD.

Each Unified Communications Manager cluster and Unified CME should have the same configuration information.

For example, Application ID should be the same on each Unified Communications Manager cluster and Unified CME.

RSVP Service parameters should be the same on each Unified Communications Manager cluster.

To enable end-to-end RSVP SIP Preconditions between clusters in Cisco Unified Communications Manager (CUCM), two SIP profile configuration parameters are mandatory. These parameters are:

1. Set the RSVP over SIP parameter to E2: This parameter configures the SIP profile to use RSVP over SIP for end-to-end preconditions. E2 stands for "End-to-End" and indicates that the endpoint devices are expected to participate in the RSVP signaling to establish a guaranteed QoS path. This parameter must be set to E2 to enable end-to-end RSVP SIP preconditions between clusters.

2. Set the SIP Rel1XX Options parameter to Send PRACK If 1xx Contains SDP: This parameter determines the behavior of the SIP endpoint when it receives a provisional (1xx) response that contains a Session Description Protocol (SDP) offer. If this parameter is set to Send PRACK If 1xx Contains SDP, the endpoint sends a PRACK message to acknowledge the provisional response. This helps to establish the RTP (Real-time Transport Protocol) stream and enables end-to-end preconditions.

Therefore, the correct answers are B and D. Option A (Set the RSVP over SIP parameter to Local RSVP) and Option C (Set the SIP Rel1XX Options parameter to Disabled) are incorrect as they do not enable end-to-end RSVP SIP preconditions between clusters. Option E (Set the SIP Rel1XX Options parameter to Send PRACK for All 1xx Messages) is not a valid parameter for this configuration. Option F (Check the Fall Back to Local RSVP check box) is also not a mandatory parameter for enabling end-to-end RSVP SIP preconditions between clusters.