
Understanding ATM Concepts
114056 Rev. A 2-25
• Segments Ethernet packets into ATM cells
• Reassembles ATM cells into Ethernet packets
• Communicates with the multicast server (MCS) to coordinate virtual LAN
configuration
For additional information regarding EtherCell features and how to install and use
the EtherCell, refer to Using the Model 10328-X EtherCell Ethernet-to-ATM
Switch.
Function of the Centillion 100 Switch
The Centillion 100 integrates LAN switching and ATM to address a wide range of
requirements that currently exist in LAN environments:
• Improving server performance by giving it a dedicated, switched-LAN port
• Segmenting congested LAN segments
• Concentrating multiple segments into a router
• Replacing multiple bridges
• Creating a multigigabit collapsed backbone
The Centillion 100 has an ATM switching backplane and a modular chassis that
can accommodate up to six switch modules. Each switch module has multiple
LAN interface and switching hardware that switches traffic among the local LAN
ports. The only traffic that traverses the ATM backplane is the traffic destined for
ports on a different switch module. The Centillion 100 supports parallel switching
operations to maximize throughput.
The Centillion 100 supports three types of switch modules:
• TokenSpeed, a token ring switch module with four shielded twisted pair
(STP), unshielded twisted pair (UTP), or fiber optic (either 16 Mb/s or
4 Mb/s) ports
• ATMSpeed/155, an ATM switch module with two ATM OC-3c (155 Mb/s)
ports
• EtherSpeed, an Ethernet switch module with sixteen 10 Base-T (10 Mb/s)
ports
For additional information regarding Centillion 100 features and how to install
and use the Centillion 100, refer to Centillion 100 Installation and Configuration.
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