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The ZebOS® AIS HIP supports master Forwarding Information Base (FIB) and Forwarding Database (FDB) in software as an extension to the hardware/silicon based FIB and FDB for performance scaling. The HIP includes an Exception Packet Handler to handle exception packets received from the Packet Driver, which failed to find the destination using hardware layer’s forwarding information. The Exception Packet Handler can route these packet appropriately as it has access to the master FIB and FDB. Exception Packet Handler can also program the hardware layer so that future packets to the same destination can be routed using a fast-path (hardware switched path) if required.
With the software based master FIB and FDB in the HIP, the customers can scale the routing performance beyond the limited size of the local forwarding database in hardware using larger RAM and more powerful CPU.
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High Performance and Scalable Frame/Packet Forwarding Diagram
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