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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.

Endpoint Troubleshooting

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)
  • A
    16% (9)
  • B
    7% (4)
  • C
    4% (2)
  • D
    73% (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.

A_SIP

_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.

B_SIPS

_SIPS DNS SRV records point to secure SIP (TLS) signaling endpoints and are unrelated to the UDS-based login process Jabber uses.

C_EDGE

_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.

D_cisco-udsCorrect

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

Topics

#Jabber#DNS SRV#_cisco-uds#login failure

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