Cisco Revives LAN-SAN Convergence Play in the Data Center

Data Center Knowledge

Cisco Networking Storage Cisco DCNM Cisco MDS 9000 Cisco Nexus 9000 FCIP FCoE LAN SAN convergence storage networking Tony AntonyWith all the ingredients finally in place in one family of switches and a revised family of storage directors, will convergence happen at last? Read More.

LAN 57

LAN Standards From IEEE

IT Toolbox

So, the next grouping of posts will focus on some specific layer standards that we use in LANs every day

LAN 32

Trending Sources

Passive optical LAN: When network speed, bandwidth and security matter

Computer Weekly

Copper-based local area networks are increasingly unfit for purpose in a digital enterprise, but passive optical LANs may be a solution. Tech evangelist Paul Ryan, chair of the Association of Passive Optical LAN, explains why

LAN 35

IBM's Impact on LANs

IT Toolbox

Particularly in the areas of microcomputers, LANs, and enterprise networking, IBM's insistence that its customers remain "pure blue" ran against both the economic and technological developments set in motion before 1990

LAN 25

Proper LAN Testing Equipment Part 5

IT Toolbox

The LAN protocol analyzer can capture, record, and analyze frames that have been transmitted on the LAN. They must therefore contain a NIC for that particular LAN, and will attach to the backbone cable in the same way that any workstation would connect

LAN 32

LANs as the User Interface in a Distributed Network

IT Toolbox

The appropriate solution was to have only the connection to the LAN with the LAN gatewayed to the larger network and providing the appropriate terminal emulation

LAN 25

Proper LAN Testing Equipment Part 3

IT Toolbox

Given the digital transmission nature of baseband LANs, one might easily overlook the need for analog test equipment. Three devices are valuable additions to the tool kit: the volt-ohm-milliameter (VOM), the oscilloscope, and the transmission impairment measurement system (TIMS

LAN 44

The LAN: A History of Network Operating Systems Part 10

IT Toolbox

In the past, if we wished to attach some other random LAN to this system, we typically needed a gateway to perform protocol conversion from whatever the LAN was using (assuming that it was not running the same DECnet protocol) to the DECnet protocols

The LAN: A History of Network Operating Systems Part 3

IT Toolbox

Even though the earliest LANs were of this genre, by 1989 it appeared that they were on the way out. We will take a close look at peer-to-peer LANs at a deeper level in some future posts By 1992, however, new life had been breathed into peer-to-peer networking by both Novell and Microsoft, along with the popularity of Artisoft's LANtastic.

Other Dead LAN Strategies

IT Toolbox

Companies such as Bridge Communications, Ungermann-Bass, AT&T, and Wang were major players, or at least they were attempting to be

LAN 25

Proper LAN Testing Equipment Part 4

IT Toolbox

The digital (or discrete) signal levels present at the LAN interfaces to PCs, printers, modems and other peripherals are the test points most familiar to network managers

LAN 31

The Maturation of LANs

IT Toolbox

A good example was Novell's NetWare 4.x product, announced in mid-1993. Competition from IBM?s s OS2 and Microsoft?s s Windows NT server would soon eclipse Novell?s s efforts

LAN 25

The Era of LANs and Multiuser Systems

IT Toolbox

Where have you seen a terminal lately? No where. PCs very quickly became those terminals through emulation software. PCs could be both and do both better. The era of terminals was dead

LAN 43

Proper LAN Testing Equipment Part 2

IT Toolbox

Volumes have been written regarding the damage that electrical transients, surges, and improper grounding techniques can cause to sensitive computer equipment ? including many of my previous posts. Instead of providing details on the subject of power protection per se, I will concentrate this time on test equipment that a typical network administrator might use

LAN 44

Some final notes on MANs vs LANs

IT Toolbox

With the development of higher-speed (14,400 b/s and higher), reasonably priced telephone modems, the situation was changing. Because analog telephone service is electronically noisy, however, the extensive error-correction techniques necessary for high-speed dial access service resulted in unpredictable service, which may limit throughput

LAN 32

The Impacts of IBM's SNA Networking on LANs Part 5

IT Toolbox

PU-T2.1 was defined in 1983 and is designed for peer-to-peer coupling (for PCs, for example) or subarea routing. The former is, in principle, nonmediated?that that is, it is not necessary for routing through VTAM or NCP, although two PCs communicating with one another through different SNA cluster controllers will probably have to pass through the Communications FEP

LAN 43

The LAN: A History of Network Operating Systems Part 9

IT Toolbox

In the early 1990s, there seemed to have been some convergence on the use of 802.2 (LLC) LLC) and 802.3/802.5 Mac sub-layers as the basic Physical and Data Link Layer technology. Every major manufacturer provided this alternative, and over time it became a common methodology employed

Proper LAN testing Equipment Part 1

IT Toolbox

A variety of devices, including cabling system testers, power line monitors, and analog and digital interface diagnosis equipment will be discussed. This is by no means an exhaustive list. Each network, because of its uniqueness, will require additions and deletions to this smorgasbord. Use it only as a guide?a a starting point for assembling your own tool kit

LAN 38

LANs and the Early Days of Office Automation

IT Toolbox

In the effort to find out how microcomputers were being used, even as early as 1982, as well as to refine further the meaning of "office automation," respondents to a survey were asked to list the uses their organizations made of micro computers

The LAN: A History of Network Operating Systems Part 12

IT Toolbox

the network system calls then provided under interrupt 21H gave all suppliers of network software the capability to standardize at least some of the access to LAN hardware. Most manufacturers of LAN software had announced or implemented support of NETBIOS for IBM LANs When DOS was extended in Version 3.1,

IBM 9

The Impacts of IBM's SNA Networking on LANs Part 3

IT Toolbox

SNA is a layered architecture similar to the International Standards Organization's Open Systems Interconnection (OSI) model. SNA proper is divided into only five (not seven) layers?End End User and Physical layers are not part of the formal scope of SNA

The Impact of Digital's DNA on LANs

IT Toolbox

DEC's implementation of Ethernet was sufficiently important to its view of networking. As a note, DEC was bought out by Compaq which was later acquired by HP

HP 25

Historical IBM Microcomputer Hardware/Software LAN Products

IT Toolbox

The concept of an overarching connectivity architecture such as SAA was one approach to managing these compromises. One clearly evident (if not explicitly stated) IBM strategy in managing outside competition was to coopt popular technology

The LAN: A History of Network Operating Systems Part 5

IT Toolbox

In general, pipes are software developers' tools for easily creating communications routines in software without having to explicitly control and issue commands to the communications hardware

The Impacts of IBM's SNA Networking on LANs Part 4

IT Toolbox

Support for resource sharing is particularly important since in a modern data communications network one primary objective is (or should be) extensive connectivity among end-users and devices

The Impacts of IBM's SNA Networking on LANs Part 2

IT Toolbox

IBM did not, for the most part, sell SNA as a generalized networking solution independent of its own product line. It was designed to be a networking solution primarily revolving around an information environment that has IBM-designed large or mid-range computers at the center

LAN 32

The LAN: A History of Network Operating Systems Part 6

IT Toolbox

Token Ring) LANs resulting in the capture of a much larger market share." These conclusions were largely based on assumptions, at the time, that growth in the marketplace will come largely in LANs based on international standards In 1987 it was said, "throughout the 1990s we should anticipate that there will be a growth in 802.3 Ethernet) and 802.5

Putting Together Your LAN Troubleshooting Toolkit

IT Toolbox

After seeing this smorgasbord of equipment available for helping you to test and troubleshoot your network, the next logical question is, "Which tools should I purchase for my network?" Here are some guidelines

NIC Power Management Porperties

Mick's IT Blog

I wrote and published a script that enabled wake on lan two years ago. Since then, I have needed to write new scripts to modify the advanced tab of the NIC properties.

LAN 55

The LAN: A History of Network Operating Systems Part 11

IT Toolbox

The network microcode was the foundation for program control of the IBM LANs; it resides in ROM on the Adapter Card, on diskette, or on the PC's motherboard The NETwork Basic Input Output System (NET-BIOS) was introduced at the same time IBM announced the PC Network in 1984.

IBM 9

The Cloud Job Market Update: SDN and APIs Are Hot

Data Center Knowledge

Cloud Computing Data Center Jobs Networking Virtualization API jobs LAN software-defined networking The digitization of the modern data center has created the need for even more robust services and control methods.

The Domination of TCP/IP on the LAN Part 1

IT Toolbox

TCP provides the packet sequencing, error control, and other services required to provide reliable end-to-end communications while IP takes the packet from TCP and passes it through whatever gateways are needed, for delivery to the remote TCP layer through the remote IP layer. Some networks, in fact, could use IP but not TCP, preferring instead to use some alternative protocol at the transport layer

The Domination of TCP/IP on the LAN Part 2

IT Toolbox

Each of the services implied by these protocols should generally be present in any implementation of TCP/IP, although SMTP was not always supported by microcomputer-based systems