Accepted Solutions
Actually it's 4 servers.
1 PUB
1 TFTP
2 SUBs
Publisher
The publisher is a required server in all clusters, and there can currently be only one per cluster. This server is the first to be installed and provides the database services to all other members in the cluster. The publisher server is the only server that has full read and write access to the configuration database. On larger systems with more than 1250 users, Cisco recommends a dedicated publisher to prevent administrative operations from affecting the telephony services. A dedicated publisher does not have any call processing services or TFTP services running on the server. Other servers run the TFTP and Unified CM services.
With Cisco Unified CM 6.x, subscriber servers in the cluster attempt to use the local database when initializing. This reduces the Cisco CallManager Service initialization time. In prior versions of Unified CM, subscriber servers in the cluster attempted to use the publisher's database when initializing. If the publisher was not available, they would use the local read-only copy from their hard drives.
The choice of hardware platform for the publisher is based on the scale and performance of the cluster. Cisco recommends that the publisher have the same performance capability as the call processing subscribers. Ideally the publisher should also be a high-availability server to minimize the impact of a hardware failure.
TFTP Server
The TFTP server performs two main functions:
•
The serving of files for services such as MoH, configuration files for devices such as phones and gateways, binary files for the upgrade of phones as well as some gateways, and various security files.
•Generation of configuration and security files. Most files generated by the Cisco TFTP service are signed and in some cases encrypted before being available for download.
The TFTP service can be enabled on any server in the cluster. However, in a cluster with more than 1250 users, other services might be impacted by configuration changes that can cause the TFTP service to regenerate configuration files. Therefore, Cisco recommends that you dedicate a specific server to the TFTP service in a cluster with more than 1250 users, with Extension Mobility, or with other features that cause configuration changes.
All above from SRND
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/6x/callpros.html#wp1043695
HTH
java
If this helps, please rate
www.cisco.com/go/pdihelpdesk
Actually it's 4 servers.
1 PUB
1 TFTP
2 SUBs
Publisher
The publisher is a required server in all clusters, and there can currently be only one per cluster. This server is the first to be installed and provides the database services to all other members in the cluster. The publisher server is the only server that has full read and write access to the configuration database. On larger systems with more than 1250 users, Cisco recommends a dedicated publisher to prevent administrative operations from affecting the telephony services. A dedicated publisher does not have any call processing services or TFTP services running on the server. Other servers run the TFTP and Unified CM services.
With Cisco Unified CM 6.x, subscriber servers in the cluster attempt to use the local database when initializing. This reduces the Cisco CallManager Service initialization time. In prior versions of Unified CM, subscriber servers in the cluster attempted to use the publisher's database when initializing. If the publisher was not available, they would use the local read-only copy from their hard drives.
The choice of hardware platform for the publisher is based on the scale and performance of the cluster. Cisco recommends that the publisher have the same performance capability as the call processing subscribers. Ideally the publisher should also be a high-availability server to minimize the impact of a hardware failure.
TFTP Server
The TFTP server performs two main functions:
•The serving of files for services such as MoH, configuration files for devices such as phones and gateways, binary files for the upgrade of phones as well as some gateways, and various security files.
•Generation of configuration and security files. Most files generated by the Cisco TFTP service are signed and in some cases encrypted before being available for download.
The TFTP service can be enabled on any server in the cluster. However, in a cluster with more than 1250 users, other services might be impacted by configuration changes that can cause the TFTP service to regenerate configuration files. Therefore, Cisco recommends that you dedicate a specific server to the TFTP service in a cluster with more than 1250 users, with Extension Mobility, or with other features that cause configuration changes.
All above from SRND
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/6x/callpros.html#wp1043695
HTH
java
If this helps, please rate
www.cisco.com/go/pdihelpdesk
