Cisco Cisco Expressway
n
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:
1. In Unified CM, go to
Device > Phone
and click Find.
2. Check the IP Address column. Devices that are registered via Expressway will display an IP Address of
the Expressway-C it is registered through.
Identifying provisioned sessions in Expressway-C
To identify sessions that have been provisioned via Expressway-C:
1. In Expressway-C, go to
Status > Unified Communications
.
2. In the
Advanced status information
section, click
View provisioning sessions
.
This shows a list of all current and recent (shown in red) provisioning sessions.
Ensuring that Expressway-C is synchronized to Unified CM
Changes to Unified CM cluster or node configuration can lead to communication problems between Unified
CM and Expressway-C. This includes changes to:
CM and Expressway-C. This includes changes to:
n
the number of nodes within a Unified CM cluster
n
the host name or IP address of an existing node
n
listening port numbers
n
security parameters
n
phone security profiles
You must ensure that any such changes are reflected in the Expressway-C. To do this you must rediscover
all Unified CM and IM & Presence nodes (on Expressway go to
all Unified CM and IM & Presence nodes (on Expressway go to
Configuration > Unified
Communications
).
Expressway certificate / TLS connectivity issues
If the Expressway's server certificate or trusted CA certificates have been modified, you must restart the
Expressway before those changes will take effect.
Expressway before those changes will take effect.
Unified Communications Mobile and Remote Access via Cisco Expressway Deployment Guide (X8.2)
Page 36 of 40
Appendix 1: Troubleshooting