IP Network

The network between the hardware components is only medium of communication hence it is considered to be the back bone of hosted SAP application. Communication between any 2 nodes is exclusively done over the IP network. It is not used for communication between servers and clients but also for providing IO blocks from the SAN to respective servers.

It is essential to have a very comprehensive IP network for the hosted SAP solution. There is a dedicated internal network for the connection between server and storage with SAP solution. For security reasons, no external traffic is allowed to go through the internal network. By default the client traffic is routed through the external network. The internal network with the hosted SAP infrastructure is redundant to ensure reliability. All the internal and external ports are connected through a 1Gbit / sec for all hardware components to handle high data traffic. The connection from Netweaver application server to storage is connected at 10Gbit/sec.

The failover for network failure is very intelligently handled on the hosted SAP environment. The term “LAN Failover” defines the ability to use a logical network interface that consists of more than one network adaptor or ports, which is again connected to multiple network paths. Whenever there is network hardware failure, the network management logic switches to the secondary available path via a network adaptor or port. When both the ports in one single NIC fail, then the failover to another server is initiated.

The infrastructure is also configured with different virtual LAN within the application with 2 switches to ensure performance and high availability. VLANs are further distributed in :

• Client LAN
• Control LAN
• Server LAN
• Storage LAN