Cisco Cisco Expressway Maintenance Manual

Changed functionality

Access to the systemunit.xml file is now protected. Only authenticated Expressway administrator accounts can
access the file. This may affect the discovery of Expressway by Cisco TMS.

Call status and call history now indicates components routed through the B2BUA for encryption or ICE support with a
component type of 'B2BUA' (formerly 'Encryption B2BUA').

Note:

The combination of having static NAT mode on and having the B2BUA engaged to do media

encryption/decryption can cause the firewall outside the Expressway-E to mistrust packets originating from the
Expressway-E. You can work around this by configuring the firewall to allow NAT reflection. If your firewall cannot
allow this, you must configure the traversal path such that the B2BUA on the Expressway-E is not engaged.

X8.1.1

Unified Communications: mobile and remote access

Cisco Unified Communications mobile and remote access is a core part of the Cisco Collaboration Edge Architecture.
It allows endpoints such as Cisco Jabber to have their registration, call control, provisioning, messaging and
presence services provided by Cisco Unified Communications Manager (Unified CM) when the endpoint is not within
the enterprise network. The Expressway provides secure firewall traversal and line-side support for Unified CM
registrations.

For more information including configuration recommendations and troubleshooting details, see

Unified

Communications: Mobile and Remote Access via Expressway Deployment Guide

Support to modify Maximum transmission unit (MTU) size

You can configure the maximum transmission unit (MTU) for each network interface on the System > IP page.

Diagnostic logging

The tcpdump facility has been removed from the Diagnostic logging tool.

Jabber Guest

Jabber Guest support has been removed (it was previously provided as a feature preview in X8.1). It will be
reintroduced in a future release of Expressway software.