Through the parallel forwarding architecture, a system capacity of more than 15 Tbps is achieved with the five fabric modules. The fabric module provides the central switching element for fully distributed forwarding on the I/O modules.
The newly announced Fabric 2 modules for Cisco Nexus 7000 Series switches is available for Cisco Nexus 7009, 7010 and 7018 Chassis. It seems Cisco Systems are coming out with a 9 slot chassis for Nexus 7000 Series Switch. The Fabric 2 module in combination with the supervisor and I/O modules supports virtual output queuing (VOQ) and credit-based arbitration to the crossbar switch to increase performance of the distributed forwarding system. VOQ and credit-based arbitration facilitate fair sharing of resources when a speed mismatch or contention for an uplink interface exists. The fabric architecture also enables future support for lossless Ethernet and unified I/O capabilities.
Some of the features and befits of the Cisco Nexus 7000 Series Fabric Modules are as follows
|High availability and redundancy||The fabrics support multilevel redundancy, where all available fabrics are active, and provide redundancy for all other fabric modules. All I/O module slots receive a fair share of the total fabric bandwidth, helping ensure lossless forwarding in the event of failover.|
|Scalable fabric||The combined fabric modules deliver 10 channels per I/O module and 5 channels per supervisor module, for a scalable capacity of more than 15 Tbps for forwarding performance, which can be increased as your needs grow.|
|Nondisruptive addition and removal of fabric modules||The switch capacity can scale with the addition of modules, with transparent upgrades for continuous operations.|
|Arbitrated crossbar for unicast||Class-of-service-aware forwarding is delivered in a fully distributed forwarding system that allows future enhancements to Ethernet to support unified I/O.|
|VOQ||In conjunction with the supervisor module, VOQ provides a quality-of-service (QoS) aware lossless fabric, avoiding the problems associated with head-of-line blocking.|
|Multistage crossbar fabric||System forwarding performance is enhanced by a combination of local fabric switching between ports on the same module and centralized forwarding through the fabric for ports on different modules.|
|Superframing and frame segmentation||Crossbar efficiency is optimized by the use of superframing and frame segmentation to provide deterministic latency and throughput.|
|ID LED||Using the beacon feature, the administrator can clearly identify the chassis and fabric module.|