Product Overview
Network Services (NNS) provides a set of software services that enhance the utilization of the Windows environment in a ClearPath server.
-
The Enhanced Virtual LAN (EVLAN) Network Service provides a seamless, fast, and secure virtual LAN data path between the MCP and Windows environments of ClearPath servers. Communication across the EVLAN uses the TCP/IP protocol. No changes are required to the applications and services in either processing environment to use EVLAN.
-
The Shared Adapter Network Services for Ethernet enables the MCP Environment to use a qualified Ethernet adapter located in the Windows environment. In the MCP Environment, both TCP/IP and BNA network providers can use this connection.
Because Network Services runs in both the Windows and the MCP Environments of the ClearPath server, services and resources can be located in the environment that is most appropriate for the task being performed.
General Features
Support for Shared Adapters
ClearPath servers support the MCPs use of network adapters within the Windows environment. These adapters provide high performance and fast transaction speeds from 10 Mbps to 10 Gbps.
Network Services supports up to eight shared adapter connections per Network Processor instance, where a connection is an Ethernet port, an 802.1Q VLAN, or an Adapter Team.
Network Services can use each of the connection types listed to allow MCP network access. On some platforms, Windows TCP/IP can remain enabled for the connection or be disabled. This range of choices results in the following connection categories; all considered forms of Shared Adapters:
-
Exclusive to Windows TCP/IP (Windows TCP/IP enabled, Network Services disabled)
-
Exclusive to the MCP Environment (Windows TCP/IP disabled, Network Services enabled)
-
Shared by both environments (Windows TCP/IP enabled, Network Services enabled) (Shared adapters can be configured only on Libra Model 450, Libra Model 460, FS1750, SP1760, LX170, or LX180 servers.)
Heritage Network Services Support (BNA)
Because Network Services Shared Adapter appears as a line of a Network Processor to the MCP Environment, BNA services have full access to the Ethernet adapter. This BNA support does not include CPDLAN terminal connectivity.
| Note: | Ethernet shared adapter software is part of the integrated operating environment. |
Network Services Support for Ethernet Jumbo Frames
Jumbo Frames provide the capability to transmit and receive frames much larger than 1,500 bytes (typically nine kilobytes) over Gigabit Ethernet. This capability improves ClearPath throughput and reduces the CPU cycles used for networking. Improvement is achieved by reducing the number of frames an application must process. This information is particularly true for applications that use large message sizes such as file transfers. The performance benefit varies depending on the protocol used.
Connection Paths and ClearPath Servers
ClearPath Network Services offers a dedicated TCP/IP communications path to the MCP and Windows environments. It provides the communications path between the MCP and specialty engines. It also provides a BNA communications path to the MCP Environment.
Ordering Information
|
Component |
Style |
|---|---|
|
Shared Adapter Network Services |
Shared Adapter Network Services is included as part of the operating environment on all ClearPath servers. |
|
Virtual LAN Network Services |
Virtual LAN Network Services is a part of the operating environment for all ClearPath servers. |
Source code is not available for the Network Services or its constituent products.
Product Information
Refer to the Network Services Implementation Guide (4198 6670) for more information.
