NonStop S-Series Planning and Configuration Guide (G06.29+)

Terms and Concepts
HP NonStop S-Series Planning and Configuration Guide—523303-021
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Wormhole Routing
Wormhole Routing
Wormhole routing is a technique for routing ServerNet packets through ServerNet
routers. Packets are immediately switched to the appropriate output ports as soon as
they arrive at the router.
Wormhole routing has the following advantages over store-and-forward routing, where
a packet is completely received by a router before it is sent along to its destination:
•
A packet is sent on to its destination as soon as enough of the packet header has
been received to determine the correct path to the destination.
•
A packet can span several routers simultaneously.
•
Routers do not have to perform processing that is required for store-and-forward
routing.
In this figure, the big circles represent routers, the lines represent ServerNet links, and
the worms represent ServerNet packets:
VST107.vsd