Cisco Cisco Expressway Maintenance Manual
Registration Control
This section provides information about the pages that appear under the Configuration > Registration menu.
About Registrations
For an endpoint to use the Expressway as its SIP registrar, the endpoint must first register with the Expressway. The
Expressway can be configured to control which devices are allowed to register with it by using the following
mechanisms:
Expressway can be configured to control which devices are allowed to register with it by using the following
mechanisms:
■
■
or an external policy service to specify
which aliases can and cannot register with the Expressway
■
restrictions based on IP addresses and subnet ranges through the specification of subzone membership rules
and
and
You can use these mechanisms together. For example, you can use authentication to verify an endpoint’s identity
from a corporate directory, and registration restriction to control which of those authenticated endpoints may register
with a particular Expressway.
from a corporate directory, and registration restriction to control which of those authenticated endpoints may register
with a particular Expressway.
deployment, endpoint registration for SIP devices may be provided by Unified CM. In this
scenario, the Expressway provides secure firewall traversal and line-side support for Unified CM registrations. When
configuring a domain, you can select whether Cisco Unified Communications Manager or Expressway provides
registration and provisioning services for the domain.
configuring a domain, you can select whether Cisco Unified Communications Manager or Expressway provides
registration and provisioning services for the domain.
Finding a Expressway With Which to Register
Before an endpoint can register with a Expressway, it must determine which Expressway it can or should be
registering with. This setting is configured on the endpoint.
registering with. This setting is configured on the endpoint.
MCU, Gateway and Content Server Registration
SIP devices cannot register prefixes. If your dial plan dictates that a SIP device should be reached via a particular
prefix, then you should add the device as a neighbor zone with an associated search rule using a pattern match equal
to the prefix to be used.
prefix, then you should add the device as a neighbor zone with an associated search rule using a pattern match equal
to the prefix to be used.
Note that the Cisco TelePresence MPS 200 and MPS 800, and the Cisco TelePresence Content Server both support
Expressway. They can therefore register directly with a Expressway-E for firewall traversal.
Expressway. They can therefore register directly with a Expressway-E for firewall traversal.
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