edge device

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edge device

(1) Any server or other networking device that is located closer to the client machines rather than being in the backbone of the network. For example, a cache server is an edge device that sits inside the firewall and holds frequently requested pages. See cache server and edge router.

(2) A network device used to convert LAN frames (Ethernet, etc.) to ATM cells and vice versa. It is typically a switching device with one ATM port and multiple LAN ports. To legacy stations, ports on an edge device look like a router port.

Under MPOA (Multiprotocol Over ATM), the edge device queries a route server for address resolution when the destination station is outside of its attached LANs. It sets up a switched virtual circuit (SVC) in the ATM network, maps LAN frames into ATM frames and forwards the traffic to the ATM backbone. Thus, the edge device performs functions usually associated with a router and becomes a major component in a LAN environment with an ATM backbone.

Edge Device
This diagram shows how an edge device interfaces into an ATM network. It converts ATM cells into LAN frames and vice versa. This example depicts an Ethernet edge device, but edge devices exist for Token Ring and FDDI LANs as well.
References in periodicals archive ?
For more information on GarrettCom's IPS42 internal power supplies for the Magnum Edge Switch family see http://www.
With up to 70 gigabits per second of capacity, the new multiservice edge switch provides up to a 14-fold increase in capacity as compared to the CBX 500.
The CBX 3500(TM) multiservice edge switch also supports the Lucent - Juniper Networks Multiservice MPLS Core solution.
Lucent's new edge switch provides the most cost-effective way to continue to transport today's profitable business services, deploy new revenue generating services and migrate to IP/MPLS," said Robert Bailey, senior vice president for technology at Choice One Communications.
The new IP/MPLS router module, developed for Lucent by Juniper Networks, enables service providers to quickly and easily add standards-based IP/MPLS to the CBX 500(R) Multiservice Edge Switch.
The iQ4000 IP Service Edge Switch is an exceptional platform on which to introduce intelligent network services," said Cam Cullen, Director of Product Management at Quarry Technologies.
The iQ4000 IP Service Edge Switch employs an eight-slot chassis designed to fit standard 19-inch Telco racks.
The iQ4000 IP Service Edge Switch will be generally available in July, 2001.
HNS will capture the edge switch market with the delivery of the first edge switch that not only meets carriers needs for greater and greater throughput, but also meets their needs for affordable, scalable solutions.
Advancements such as this Outdoor Carrier Ethernet Edge Switch are helping service providers achieve a priority goal of extending carrier Ethernet to more locations," said Stan Hubbard, Senior Analyst, Heavy Reading.
Lucent will also be demonstrating standards-based Ethernet interworking with its CBX 3500(TM) Multiservice Edge Switch, the PacketStar(TM) PSAX Multiservice Media Gateway, the Stinger(R) DSL Access Concentrator, and Riverstone's RS 8000 Aggregation Router and 15008 Ethernet Edge Router.