Limitations - Avaya 1110 Fundamentals

VPN to connect to the local network, the .prv files used to configure the phone must specify
the valid provisioning server and provisioning zone ID on the corporate network, which is
accessed using VPN.
For more information about Listening Mode, see the Avaya 1120E, 1140E, 1150E IP
Deskphone User Guides.

Limitations

• RFC 3456, DHCP over IPSec is not supported. This means that Full DHCP mode is not
supported; therefore any provisioning information must be configured manually or
configured using the peer-to-peer provisioning feature. It is not possible to configure the
name and address of the provisioning server using DHCP.
• The Mode Config exchange does not include a mechanism for providing the URL of a
provisioning server. In non VPN mode the URL can be provided by DHCP Option 66.
Therefore, the provisioning server URL must be configured manually or configured using
the peer-to-peer provisioning feature.
• IP Compression in Phase 2 is not supported.
• This feature is not included as part of BootC. Therefore if application area of Flash memory
is corrupted the phone cannot recover automatically when the VPN feature is enabled.
• The Cached IP Address feature for the inner IP Address is not supported when the VPN
feature is enabled.
• Redundant and load sharing servers must use the same security credentials and methods
as the primary server, for example, there is no mechanism to provision separate
credentials for different servers.
• The Provisioning PC must allow a TFTP server to run. In Windows Vista this means the
user must have administrator privileges.
• If the UserIDs and Passwords are saved in nonvolatile memory and are accepted by the
VPN Router the user is not prompted to enter their UserID and Password. In this situation,
the only way a UserID and Password can be modified is through the manual configuration
menu.
• If a security credential becomes invalid or obsolete while the VPN tunnel is active the
tunnel is not affected until the next time the credential is required. For example, if a
certificate expires or a UserID is deleted the while the tunnel is operating, the tunnel
continues to operate until the next rekey operation occurs.
IP Deskphones Fundamentals
Description
February 2013 547