300-085 Question #210: Real Exam Question with Answer & Explanation

The correct answer is A: 1. Integrating CUCM with an IM and Presence cluster requires only one SIP trunk on CUCM, regardless of the number of nodes in either cluster. IM&P presents itself as a single logical endpoint for the trunk.

Cisco Unified IM and Presence

Question

You want to integrate a Cisco Unified Communications Manager cluster with three nodes and a Cisco Unified IM and Presence cluster with two nodes. How many SIP trunks do you need to configure on Cisco Unified Communications Manager?

Options

Explanation

Integrating CUCM with an IM and Presence cluster requires only one SIP trunk on CUCM, regardless of the number of nodes in either cluster. IM&P presents itself as a single logical endpoint for the trunk.

Common mistakes.

B. Two SIP trunks would only be required if there were two separate, independent IM&P clusters; a single cluster always maps to a single trunk.
C. Three trunks would incorrectly map to the number of CUCM subscriber nodes, but the integration design does not follow a per-CUCM-node trunk model.
D. Four trunks would correspond to the combined node count of both clusters, which is not how the CUCM-to-IM&P SIP trunk integration is architected.

Concept tested. CUCM to IM and Presence SIP trunk integration

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucimpt/10_5/imp_10_5_config/imp_10_5_config_chapter_01110.html

Topics

#SIP trunk#CUCM IM&P integration#cluster topology#trunk count

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