Which DNS record and port combination must be resolved externally for Mobile and Remote Access to be used?

The correct answer is A. _collab-edge on port 8443. For Cisco Mobile and Remote Access (MRA) to function, endpoints outside the corporate network must be able to discover the Cisco Expressway-E. This is accomplished via an external DNS SRV record: _collab-edge._tls.<domain> resolved on port 8443 (HTTPS/TLS). Jabber and other…

Mobile and Remote Access

Question

Options

A_collab-edge on port 8443
B_cisco-uds-edge on port 5061
C_collab-edge on port 5061
D_cisco-uds on port 8443

How the community answered

(26 responses)

A
88% (23)
B
4% (1)
C
8% (2)

Explanation

For Cisco Mobile and Remote Access (MRA) to function, endpoints outside the corporate network must be able to discover the Cisco Expressway-E. This is accomplished via an external DNS SRV record: _collab-edge._tls.<domain> resolved on port 8443 (HTTPS/TLS). Jabber and other MRA-enabled clients query this SRV record to find the Expressway-E address. Port 8443 is used for the HTTPS-based service discovery and signaling bootstrap. The other records (_cisco-uds, _cisco-uds-edge) and port 5061 relate to different services (UDS for directory/user lookup and SIP TLS), but _collab-edge:8443 is the required external DNS entry for MRA.

Topics

#Mobile and Remote Access#DNS SRV record#Expressway-E#Port 8443

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