1. Clustering of Cisco switches involves making several small-sized switches manageable through a graphical user interface. It allows you to use only one IP address to be able to control up to 16 switches. The requirement is that they be directly connected to each another; but that doesn't mean they must be in the same wiring closet.
2. Cascading of Cisco switches involves connecting one switch to the next, which connects to the next, which connects to the next, and so on. Most often this is done using the GigaStack GBIC, which offers an inexpensive Gigabit-speed interconnect that is shared among all the switches in the cascade. (Not all switches can take the GS GBIC: chassis switches, for example.)
But cascading of switches can also mean "daisy-chaining" or linking several switches in series, using dedicated switch-to-switch connections. When done with GigaStack GBICs, the switches must be in the same wiring closet: the GigaStack cable length between a pair of switches cannot be more than one (1) meter. When done with other ports in "daisy-chain" or series fashion, the distance on a point-to-point, dedicated connection between a pair of cascaded switches is limited by the media being used: 100 meters for Category 5 unshielded twisted pair for copper cable; or longer, for fiber optic connections.
3. Stacking of Cisco switches can mean either the general physical "stacking" of several small switches one on top of another, or specifically the interconnection of several small switches using a proprietary high-speed interconnection scheme (as used on the Catalyst 3750 series).
The confusion between these terms comes from the fact that they are not mutually exclusive. Stackable and cascaded switches can be clustered; stackable switches can be, and often are, cascaded; Cisco chassis switches can be physically stacked on top of each another, or can be connected in cascade fashion. But Cisco chassis switches cannot be clustered, at least not at this time. (Who knows, maybe they're working on this as I write.)
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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