300-085 · Question #109
You want to use BFCP for video desktop sharing with Cisco Jabber clients that are registered on two different Cisco Unified Communications Manager clusters. Which option must you configure?
The correct answer is A. On the SIP profile, select "Allow Presentation Sharing using BFCP.". To enable BFCP-based video desktop sharing between Jabber clients on separate CUCM clusters, the SIP profile must be explicitly configured to permit BFCP presentation sharing.
Question
You want to use BFCP for video desktop sharing with Cisco Jabber clients that are registered on two different Cisco Unified Communications Manager clusters. Which option must you configure?
Options
- AOn the SIP profile, select "Allow Presentation Sharing using BFCP."
- BNo option must be configured, because the feature works by default.
- CSelect "Allow Presentation Sharing Using BFCP" in the protocol-specific configuration section of
- DOn the SIP trunk security profile, select "Allow BFCP Protocol."
- EOn the SIP trunk, select "Allow BFCP Video Desktop Sharing."
How the community answered
(21 responses)- A71% (15)
- B5% (1)
- C10% (2)
- E14% (3)
Why each option
To enable BFCP-based video desktop sharing between Jabber clients on separate CUCM clusters, the SIP profile must be explicitly configured to permit BFCP presentation sharing.
BFCP (Binary Floor Control Protocol) is negotiated during SIP session establishment via SDP offer/answer, and the SIP profile applied to the inter-cluster SIP trunk must have 'Allow Presentation Sharing using BFCP' enabled. Without this setting, CUCM will not advertise BFCP capabilities in SDP, so the desktop sharing negotiation between clusters will fail entirely.
BFCP support is not enabled by default on CUCM SIP profiles and requires explicit administrator configuration before it is advertised in SDP.
The protocol-specific configuration section of a device profile does not expose BFCP enablement controls; that setting belongs on the SIP profile.
The SIP trunk security profile governs TLS and digest authentication parameters, not BFCP capability advertisement in SDP.
There is no 'Allow BFCP Video Desktop Sharing' checkbox directly on the SIP trunk configuration page; the relevant control is in the SIP profile.
Concept tested: BFCP presentation sharing enabled via CUCM SIP profile
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_0100111.html
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