210-065 · Question #328
Jabber fail login with logs. What DNS SRV record need to resolve this issue?
The correct answer is D. _cisco-uds. Cisco Jabber uses DNS SRV records to auto-discover the CUCM home cluster during login. The _cisco-uds record points Jabber to the User Data Services endpoint on CUCM.
Question
Jabber fail login with logs. What DNS SRV record need to resolve this issue?
Options
- A_SIP
- B_SIPS
- C_EDGE
- D_cisco-uds
How the community answered
(55 responses)- A16% (9)
- B7% (4)
- C4% (2)
- D73% (40)
Why each option
Cisco Jabber uses DNS SRV records to auto-discover the CUCM home cluster during login. The _cisco-uds record points Jabber to the User Data Services endpoint on CUCM.
_SIP DNS SRV records are used for locating SIP proxy servers for call signaling and do not facilitate Jabber's authentication or home-cluster discovery.
_SIPS DNS SRV records point to secure SIP (TLS) signaling endpoints and are unrelated to the UDS-based login process Jabber uses.
_EDGE DNS SRV records (specifically _collab-edge) are used for Jabber to discover the Expressway-E for MRA external access, not for internal UDS-based login.
The _cisco-uds DNS SRV record enables Cisco Jabber to locate the Cisco Unified Communications Manager User Data Services (UDS) API, which is the primary mechanism for Jabber home-cluster discovery and user authentication. Without this record resolving correctly, Jabber cannot identify its home CUCM node and the login process fails. This record is queried in the format _cisco-uds._tcp.<domain>.
Concept tested: Cisco Jabber DNS SRV record for UDS home-cluster discovery
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/jabber/12_5/cjab_b_cisco-jabber-planning-guide-125/cjab_b_cisco-jabber-planning-guide-125_chapter_01001.html
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