Clan Access For Ess Registration - Avaya ESS User Manual

CLAN access for ESS registration

During the ESS server configuration, an IP address of a CLAN is used. The ESS server uses
this configured CLAN IP address during the initial registration with the Main server(s). Careful
consideration should be used in selecting the CLAN that will be used in the ESS server
configuration. This CLAN should be local to the ESS server or of high availability to the ESS
server. During the initial registration to the Main server(s), the ESS server does not contain
translations, and therefore has no knowledge of other CLAN boards in the configuration. If the
ESS server cannot communicate with the configured CLAN board it will be unable to register
with the Main server.
When an ESS server registers with the Main server through the CLAN, the Main server
validates the ESS server's Module ID, System ID, platform type, and IP address with that of the
administered values. Only the active server of an S8700 series media server pair registers with
the Main server. Once registered, the ESS server uses the same CLAN it used to register, to
send Keep-Alive messages to the Main server.
The ESS server re-registers with the Main server when:
Translations are received from the Main server(s): The ESS server performs a reset
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after receiving translations from the Main server. During the reset the ESS server stops
sending Keep-Alive messages.
Once translations are loaded on the ESS server, the ESS server re-registers with the Main
server. The ESS server attempts to use the CLAN in its configuration for the registration
process. If communication with the configured CLAN is not available, the ESS server
selects a CLAN from its list of available CLANs. The ESS server re-registers to the Main
server through the available CLAN and, after registration, uses the CLAN to send
Keep-Alive messages to the Main server.
Note:
If an ESS server is still registered with the Main server while controlling Port
Note:
Networks, the ESS server can receive translation downloads from the Main
server. In this case, the ESS server accepts the translation download but does
not reset until it no longer controls any Port Networks.
The CLAN reboots or fails: If the CLAN that the ESS server used to register to the Main
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server reboots or fails, the Keep-Alive messages from the ESS server to the Main server
stops. The Main server shows the status of the ESS server as unregistered in the status
ess cluster window. The ESS server attempts to communicate with the lost CLAN. If
attempts to communicate with the lost CLAN fails, the ESS server selects another CLAN
from its list of CLANs.
CLAN access for ESS registration
Issue 1.1 June 2005 65