Cisco LocalDirector

Cisco LocalDirector is a server load balancing appliance, discontinued in 2003,[1] based on the Network Address Translation (NAT) technology Cisco Systems acquired when they bought Network Translation, Inc. The LocalDirector was conceived by John Mayes & Robert Andrews in late 1995 during a pre-acquisition meeting with Robert, Webmaster at Netscape Communications Corporation. During the meeting, Robert Andrews told John Mayes that there were, "probably 10 customers in the world with a load balancing problem". Because of this, the decision was made to begin development on the LocalDirector.

Brantley Coile, who had written the code for the PIX firewall for NTI and later Cisco, started coding of the LocalDirector very shortly after this meeting. As a result of the NTI acquisition by Cisco Systems in late 1995, Brantley hired a team of four long-time associates who were developers: Richard Howes, now at Steelbox Networks, and Pete Tenereillo worked for NTI prior to the Cisco acquisition, and Jim Jordan and Tom Bohannon, also at SteelBox, were hired immediately after the acquisition. Together the four developed the code for the Finesse OS and LocalDirector (Finesse was also used in the Cisco version of the PIX). The majority of the LocalDirector code was shared with the early PIXes.[2]

Though F5 and Cisco started development of a load balancing product around the same time, F5 needed to re-staff and re-develop after the first attempt. The LocalDirector was the industry's first load balancer. It first shipped to a customer in April 1996, only four months after development started, beating the next earliest competitors, F5 and HydraWeb, to market by a full year.

Load balancing provides three important functions. It provides server availability, server scalability and the ability to manage server by bringing them on and off line.

All LocalDirector models were built with Intel-based/Intel-compatible motherboards, along with Intel and Digital network chipsets. The LocalDirector utilizes a proprietary operating system that Cisco calls Finesse. The PIX firewall today uses a derivative of the same operating system. All systems boot from flash memory.

History and hardware/software specifications

Model LocalDirector
47-3158-01		 410 415 / CA-LDIR 416 417 417G 420 430
Introduced 2Q96 1997 ? 1999 ? ? 1998 1999
Discontinued ? ? 1998 2002 2003 2003 ? 2002
CPU type Intel Pentium Intel Pentium Pro Intel Pentium Pro Intel Celeron (SL3BA) Intel Pentium III Intel Pentium III Intel Pentium II Intel Pentium II
CPU speed 133 MHz 166 MHz 200 MHz 433 MHz 600 MHz 600 MHz 300 MHz 450 MHz
Chipset Intel 430HX Intel 440GX Intel 440FX Intel 440BX ? ? Intel 440BX Intel 440BX
Default RAM 16 MB 32 MB 32 MB 32 MB 512 MB 512 MB 128 MB 384 MB
Boot flash device Daughtercard Daughtercard Daughtercard Daughtercard Onboard Onboard Daughtercard Daughtercard
Default flash 2 MB 2 MB 2 MB 2/4 MB 16 MB 16 MB 2 MB 2/4 MB
Default interfaces 2 ? ? Three LD-FE ? ? Three LD-FE One LD-QUADFE
Max interfaces 4 ? ? ? ? ? ? ?
Fixed interfaces No No No No Six 10/100baseT Two 1000baseSX and two 10/100baseT No No
Expansion cards supported ? ? ? ? ? ? ? ?
Floppy drive Yes Yes Yes Yes Some No Yes Yes
Failover supported Yes Yes Yes Yes Yes Yes Yes Yes
Model 410 415 416 417 417G 420 430

List of PCI and ISA expansion cards for the LocalDirector

PEP 4MB card

See also

Citations

  1. ↑ "Cisco's End of Life notice for the LocalDirector". Retrieved 2008-06-25.
  2. ↑ "John Mayes' notes on creating the LocalDirector". Retrieved 2008-06-25.
  3. ↑ "Cisco LocalDirector install guide, version 3.3.3". Retrieved 2008-07-07.
  4. ↑ "Cisco's end of life notice for the LocalDirector". Retrieved 2008-07-07.

External links

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