Cisco Cisco Expressway
The DNS lookup includes the following SRV services that are used for Unified Communications:
n
_collab-edge._tls
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_cuplogin._tcp
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_cisco-uds._tcp
Note: the following SRV records may be queried by the lookup tool or the client, but they are not required.
You can ignore name errors related to these:
You can ignore name errors related to these:
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_cisco-phone-tftp._tcp
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_cisco-phone-http._tcp
Checking reachability of the Expressway-E
Ensure that the FQDN of the Expressway-E is resolvable in public DNS.
The FQDN is configured at
System > DNS
and is built as <System host name>.<Domain name>.
Checking call status
Call status information can be displayed for both current and completed calls:
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Current calls: the
Call status
page (
Status > Calls > Calls
) lists all the calls currently passing through
the Expressway.
n
Completed calls: the
Call history
page (
Status > Calls > History
) lists all the calls that are no longer
active. The list is limited to the most recent 500 calls, and only includes calls that have taken place since
the Expressway was last restarted.
the Expressway was last restarted.
If the Expressway is part of a cluster, all calls that apply to any peer in the cluster are shown, although the list
is limited to the most recent 500 calls per peer.
is limited to the most recent 500 calls per peer.
Mobile and remote access calls have different component characteristics depending on whether the call is
being viewed on the Expressway-C or Expressway-E:
being viewed on the Expressway-C or Expressway-E:
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On an Expressway-C, a Unified CM remote session will have 3 components (as it uses the B2BUA to
enforce media encryption). One of the Expressway components will route the call through one of the
automatically generated neighbor zones (with a name prefixed by either CEtcp or CEtls) between
Expressway and Unified CM.
enforce media encryption). One of the Expressway components will route the call through one of the
automatically generated neighbor zones (with a name prefixed by either CEtcp or CEtls) between
Expressway and Unified CM.
n
On an Expressway-E, there will be one component and that will route the call through the
CollaborationEdgeZone.
CollaborationEdgeZone.
Note that if both endpoints are outside of the enterprise (i.e. off premises), you will see this treated as 2
separate calls.
separate calls.
Rich media sessions
If your system has a rich media session key installed and thus has been extended to support business-to-
business calls, and interworked or gatewayed calls to third-party solutions and so on, those calls are also
listed on the call status and call history pages.
business calls, and interworked or gatewayed calls to third-party solutions and so on, those calls are also
listed on the call status and call history pages.
Checking devices registered to Unified CM via Expressway
Identifying devices in Unified CM
To identify devices registered to Unified CM via Expressway:
Unified Communications Mobile and Remote Access via Cisco Expressway Deployment Guide (X8.6)
Page 49 of 55
Appendix 1: Troubleshooting