dual-attached

dual-attached

The form of FDDI interface where a device is connected to both FDDI token-passing rings, so that uninterrupted operation continues in the event of a failure of either of the rings. All connections to the main FDDI rings are dual-attached. Typically, a small number of critical infrastructure devices such as routers and concentrators are dual-attached, whereas host computers are normally single-attached or dual-homed to a router or concentrator.

For example, a ring could be formed between a single router and two concentrators (all dual-attached) then all other components that need to be fault-tolerant (typically file servers) can be dual-homed to both concentrators.
References in periodicals archive ?
The dual-attached Hall Green and Oxford handler has been informed that Buckfast Kid (Romford, February 24) and Babette (Hall Green, March 5) both tested positive for betablocker Timolol.
Hiway Technologies network backbone comprises two BigIron 4000 routers operating in a redundant configuration for 15 dual-attached FastIron 24 port workgroup switches with dual Gigabit Ethernet uplinks.
The May 09 whelp couldn't be in better hands, as dual-attached trainer Mike Peterson not only won Hall Green's first running of this stake with Asgard Class but also Oxford's version with Teds Porche four weeks later
Wrapping is only possible with dual-attached nodes, where the station or concentrator is physically linked to both rings.
Backbone server connections will include both OC-12 and OC-3 high-speed ATM connections with some that will be dual-attached for redundancy.
Motorola has also chosen the RNS 1250 Series of single-and dual-attached FDDI cards, which will be used in its VME-based XR Series "EXCHANGE READY" Systems, targeted for telecommunications Original Equipment Manufacturers, System Integrators and Value-Added Resellers.
Optional FDDI module for the 5216xp, supporting single or dual-attached connections, allows easy integration with existing FDDI backbones and enables link distances up to 2000 meters.
Expansion modules for the 5216xp range in price from $795 for the TX expansion to $3,195 for the FDDI dual-attached module.
Under the agreement, RNS will supply V-I Computer with its 2250-FD, a PCI Mezzanine Card dual-attached FDDI network interface card which allows PCI Local Bus adapters to connect directly to the motherboard of a VMEbus CPU and provides a faster and less expensive network interface than a VMEbus connection.
Tuesday introduced a series of PMC FDDI and Fast Ethernet adapters, including the industry's only dual-attached fiber card for the PMC form factor.
The 4611 is $1,450 for single-attached multimode fiber, $1,850 for dual-attached multimode fiber, and $1,250 for single-attached copper.

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