Router configuration for new users-IOS Introduction

I0S (Internet work 0 perating System, an inter-network operating System) is a special software that can be used to configure Cisco router hardware so that information can be routed from one network or bridge to another. 10 s is the "power source" of Cisco vro products ". It can be said that the existence of 10 s makes the Cisco router have a powerful vitality. When purchasing a Cisco router, you must also purchase a license for running IOS. 10 s has a variety of features. You must decide which form of 10 S to run based on your actual situation.
There are multiple versions in 10 s. Generally, new software, old software, or more mature software should be used according to your habits. Do you need a special IOS function or have decided to adopt a specific hardware platform.
C1sco uses a set of coding schemes to develop IOS versions. The complete 10 s version number consists of three parts:
1) Main version.
2) Auxiliary version.
3) maintain the version.
The primary and secondary versions are separated by a decimal point. The two constitute a set of major IOS versions. The maintenance version is displayed in the ARC. For example, if an IOS version is 11.2 (10), its major version is 11.2, And the maintenance version is 10 (10th maintenance or patch ). Cisco often releases IOS updates to fix existing errors or add new features. After an update is released, the maintenance version number is usually increased progressively.
Because there are too many IOS versions, Cisco also provides release instructions to describe version changes and new content. If you want to know the changes to a version or what content is added to the new version, read the release notes carefully.
Cisco adopts a special naming scheme to let us know how reliable their software is! The names of these versions are defined as follows:
General Deployment (Standard Edition-GD), Limited DepIoyment (restricted edition-LD), and Early Deployment (earlier version-ED ).
Generally, the GD version of I0S is the most reliable. If a set of 10 s has been in the market for a long time, so that Cisco can correct enough errors, and C5sco believes that the majority of people who have used the software are satisfied, it will be given a GD name.
After the version number changes, the function or feature changes slightly. Select the desired features based on the content you want to run on the vro. For example, do you only want to run "Internet Protocol" (Intemec Protoc01, IP), or do you want to run IP, Novell's "Internetwork Packet exchange" (IIX), and DECnet at the same time? According to your own needs, you can sum up all the features you want the router to have in the network, and then select I0S based on these features.
Vrouters running for 10 s have various models. From very cheap low-end models to very expensive high-end models. Generally, the model purchased by yourself should be determined based on the purpose and price of the router. If a router is configured for a network trunk, a series of high-end routers should be considered to achieve extremely fast speed and reliability, and multiple interfaces can be set in it. However, if the new router is bought to connect the office LAN or WAN to the same trunk line, you should consider an access type of the router series. I don't want to discuss the price with you here-it's changing too fast. However, there is always a rule: the smaller the model number, the cheaper it is.
It is gratifying that for IOS configurations, its commands are basically common in the entire IOS router product line. This means that we only need to know a command interface. This interface exactly belongs to another command line interface. Therefore, no matter whether you use the Console port, a Modem, or a Telnet connection to communicate with the vro, the command line interface is the same.
Vrouters provide support for all types of LAN or WAN interfaces. Bi Jing, vrouters without interfaces are not very useful. An important aspect of I0S configuration is interface configuration. Some physical interfaces supported by routers include:
-- Ethernet.
-- Fast Ethernet
-- Starting ring.
-- FDDI.
-- Low-speed serial.
-- Fast serial.
-- HSSI.
-- Isdn bri.
Do not assume that the content described here remains unchanged. In fact, the change in this field is too fast, and I am not a salesman or businessman. To learn more about the 10 s version, 10 s feature set, and vro model, visit the vendor's website. Article entry: csh responsible editor: csh