Cisco Cisco Expressway
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If your Expressway-E has one NIC enabled and is using static NAT mode, note that:
You must enter the FQDN of the Expressway-E, as it is seen from outside the network, as the peer address on
the Expressway-C's secure traversal zone. The reason for this is that in static NAT mode, the Expressway-E
requests that incoming signaling and media traffic should be sent to its external FQDN, rather than its private
name.
the Expressway-C's secure traversal zone. The reason for this is that in static NAT mode, the Expressway-E
requests that incoming signaling and media traffic should be sent to its external FQDN, rather than its private
name.
This also means that the external firewall must allow traffic from the Expressway-C to the Expressway-
E's external FQDN. This is known as NAT reflection, and may not be supported by all types of firewalls.
E's external FQDN. This is known as NAT reflection, and may not be supported by all types of firewalls.
, for more information.
Unified CM
1.
If you have multiple Unified CM clusters, you must confgure ILS (Intercluster Lookup Service) on all of the
clusters.
clusters.
This is because the Expressway needs to communicate with each user's home Unified CM cluster, and to
discover the home cluster it sends a UDS (User Data Service) query to any one of the Unified CM nodes.
discover the home cluster it sends a UDS (User Data Service) query to any one of the Unified CM nodes.
for your version.
2.
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.
Information > Region) is set to a suitable upper limit for your system, for example 6000 kbps.
for more information.
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Mobile and Remote Access Through Cisco Expressway Deployment Guide
Configuration Overview