Cisco N77-C7706-FAB-2 Nexus 7700 Switch 220 Gbps/Slot Fabric Module
Overview
Switch fabric scalability is made possible through the support up to six concurrently active fabric modules for increased performance as your needs grow. All fabric modules connect to all module slots. The addition of each fabric module increases the bandwidth to all module slots up to the system limit of six fabric modules. The architecture supports lossless fabric failover, with the remaining fabric modules load balancing the bandwidth to all the I/O module slots, helping ensure graceful removal and insertion.
The combination of the Cisco Nexus 7700 fabric module, the supervisor and I/O modules supports the virtual output queue (VOQ) feature and credit-based arbitration to the crossbar switch to increase the performance and efficiency 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.
High availability and redundancy
The fabrics support multilevel redundancy, in which 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.
Non-disruptive addition and removal of fabric modules
The switch capacity can scale as more fabric modules are added to the system, 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 fair scheduling in the event of congestion as well as lossless Ethernet capabilities for FCoE requirements.
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.
Super-framing and frame segmentation
Crossbar efficiency is optimized by the use of super-framing 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.
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