Adapters enable WAN optimization, load balancing
The B420-SR is a dual port 10Gb Ethernet card with PCI Express 2.0 host bus interface and the B404-BT is a quad port 1Gb Ethernet adapter with PCI Express 2.0 interface. The key architectural advantage of the bypass adapters is the ability to fully offload key functions such as TCP/IP, traffic management, packet analysis and filtering onto the T4 ASIC. This relieves the CPU of network traffic and derives a higher level of performance, noted the company. The T4 ASIC-based unified wire Ethernet cards also perform inline wire-speed sniffing, tracing and time-stamping.
To help maintain business continuity in the event of a failure, the bypass adapters provide for the network traffic to flow out of the alternate port on the adapter, bypassing the problem server appliance and maintaining the traffic flow. In addition, the integrated switch and built-in traffic management capabilities on the T4 ASIC can classify flows, redirect and reject traffic without host intervention such that the host listens on desired flows only. This selective bypass can be enabled on a per packet basis at line rate. It also offloads TCP traffic completely from the CPU, enabling CPU resources to be used for application processing rather than network protocol overhead processing.
The B420-SR and B404-BT Bypass Adapters are available from Chelsio.