Cisco Cisco TelePresence Video Communication Server Expressway
access is set to Do not check credentials.
Call bit rate is restricted to 384 kbps / video issues when
using BFCP (presentation sharing)
using BFCP (presentation sharing)
This can be caused by video bit rate restrictions within the regions configured on Unified CM.
Ensure that the Maximum Session Bit Rate for Video Calls between and within regions (
System
> Region Information > Region
) is set to a suitable upper limit for your system, for example 6000 kbps.
Endpoints cannot register to Unified CM
Endpoints may fail to register for various reasons:
n
Endpoints may not be able to register to Unified CM if there is also a SIP trunk configured between Unified
CM and VCS Control. If a SIP trunk is configured, you must ensure that it uses a different listening port on
Unified CM from that used for SIP line registrations to Unified CM. See
CM and VCS Control. If a SIP trunk is configured, you must ensure that it uses a different listening port on
Unified CM from that used for SIP line registrations to Unified CM. See
n
Secure registrations may fail ('Failed to establish SSL connection' messages) if the server certificate on
the VCS Control does not contain in its Subject Alternate Name list, the names of all of the Phone Security
Profiles in Unified CM that are configured for encrypted TLS and are used for devices requiring remote
access. Note that these names — in both Unified CM and in the VCS's certificate — must be in FQDN
format.
the VCS Control does not contain in its Subject Alternate Name list, the names of all of the Phone Security
Profiles in Unified CM that are configured for encrypted TLS and are used for devices requiring remote
access. Note that these names — in both Unified CM and in the VCS's certificate — must be in FQDN
format.
IM and Presence Service realm changes
Provisioning failures can occur when the IM and Presence Service realm has changed and the realm data on
the VCS Control has not been updated.
the VCS Control has not been updated.
For example, this could happen if the address of an IM and Presence Service node has changed, or if a new
peer has been added to an IM and Presence Service cluster.
peer has been added to an IM and Presence Service cluster.
The diagnostic log may contain an INFO message like "Failed to query auth component for
SASL mechanisms
SASL mechanisms
" because the VCS Control cannot find the realm.
Go to
Configuration > Unified Communications > IM and Presence Service nodes
and click Refresh
servers and then save the updated configuration. If the provisioning failures persist, verify the IM and
Presence Service nodes configuration and refresh again.
Presence Service nodes configuration and refresh again.
No voicemail service ("403 Forbidden" response)
Ensure that the Cisco Unity Connection (CUC) hostname is included on the HTTP server allow list on the
VCS Control.
VCS Control.
"403 Forbidden" responses for any service requests
Services may fail ("403 Forbidden" responses) if the VCS Control and VCS Expressway are not
synchronized to a reliable NTP server. Ensure that all VCS systems are synchronized to a reliable NTP
service.
synchronized to a reliable NTP server. Ensure that all VCS systems are synchronized to a reliable NTP
service.
Unified Communications Mobile and Remote Access via Cisco VCS Deployment Guide (X8.5.2)
Page 51 of 54
Appendix 1: Troubleshooting