300-820 · Question #135
An employee has recently left an organization and a manager suspects that this employee may have made changes to the system that no one is aware of. Mobile and Remote Access registration is not…
The correct answer is C. link to the DefaultZone. In Cisco Expressway, zones (including Traversal Zones) must be connected via Links to allow calls to be routed between them. Without a Link between the TraversalZone and the DefaultZone, calls arriving via the traversal path cannot be forwarded to internal endpoints, and…
Question
An employee has recently left an organization and a manager suspects that this employee may have made changes to the system that no one is aware of. Mobile and Remote Access registration is not working. Internal communications appear to be working, but no external system is able to register or call anywhere. While investigating this problem, it is discovered that no internal systems are able to call externally either. What is the TraversalZone missing that is causing this issue?
Options
- ASIP trunk to the DefaultZone
- Broute pattern to the DefaultZone
- Clink to the DefaultZone
- Dpipe to the DefaultZone
How the community answered
(24 responses)- A17% (4)
- B4% (1)
- C71% (17)
- D8% (2)
Explanation
In Cisco Expressway, zones (including Traversal Zones) must be connected via Links to allow calls to be routed between them. Without a Link between the TraversalZone and the DefaultZone, calls arriving via the traversal path cannot be forwarded to internal endpoints, and internal calls cannot be routed outbound through the traversal. This explains why MRA registration fails and why no internal system can call externally - all traffic hitting the Traversal Zone has no path to the DefaultZone (which represents locally registered devices and search rules). A rogue administrator could silently delete a Link to break external connectivity. SIP trunks, route patterns, and pipes are not the mechanism used to connect zones on the Expressway.
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