CCNA Experiment 32 ISDN

CCNA Experiment 32 ISDN

Environment: Windows XP ,Boson NetSim7.02

Objective: To understand briefly ISDN and master the basic configuration

Description

ISDN Integrated Services Digital Network (Integrated Services Digitally network,ISDN) is an international standard for digital telephony networks and is a typical circuit switching network system. It transmits voice and data at a higher rate and quality through ordinary copper cables. The hosting business type of ISDN is divided into two levels according to the data rate of the business.

1, the basic Rate Interface (BRI:BASICRATEINTERFACE), the rate is composed of two bearer channels and a data control channel, called 2b+d, where B (Bearer) is the standard PCM rate 64kbps,d (Data) is 16kbps, There is also a 48Kps channel for framing and synchronization, so it provides 192Kbps of voice and data bandwidth. This rate applies to home or small business needs.

2 , the base group Rate Interface (PRI:PRIMARYRATEINTERFACE), which supports T1 (23b+d:1.544mbps) and E1 (30b+d:2.048mbps), for large-capacity users or group users. (d:64kbps) The T1 is mainly applied to Japan and North America, and E1 is suitable for Europe and China and other regions.

3 , ISDN protocol model:

The first layer: the physical layer, which specifies the electrical and mechanical characteristics of various ISDN devices, and the physical electrical signal standards;

The second layer: Data link layer, complete the physical connection between the data framing/Zhei and the corresponding error correction functions, to provide a error-free communication link to the upper layer;

The third layer: The network layer, for routing, data exchange, etc., is responsible for the end-to-end message is correctly passed to the peer.

The fourth tier describes interprocess communication, application-agnostic user services and their associated interfaces and applications, which are not within the ISDN specification and are determined by the relevant application.

4 , DDR (dial-on-demand): This feature is cool for ISDN. The process of DDR operation:

1 , decide what packet can trigger dialing, that is, identify the "interested" package;

2 If this is surrounded by traffic that is interesting, then now see if the connection has been established, and if so, send the data.

3 If the link is not connected at that time, then if the interface is up-activated

Then we'll dial it with a phone number and send it out.

5 , the configuration requirements for DDR:

1 , define static routes, define how to reach the remote network and what interface to reach, at which point all routers must have static routes that define all known networks. You can use the default route in the stub network.

2 , specifying the traffic that triggers the DDR for the router.

3 , configure dialing information, and this number will be used when the dial-up connection reaches the interface of the remote network.

Experiment A, (BRI configured for ISDN) NetSim creates the topology as follows:

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1, Configuration ISDN1

router>en

Router#conf T

Router (config) #host ISDN1

ISDN1 (config) #username ISDN2 password kkfloat// Create a peer- to-peer user name and password for CHAP authentication.

ISDN1 (config) #int loopback 0// go to change back port 0

ISDN1 (config-if) #ip Add 1.1.1.1 255.255.255.0// Configure IP Address

ISDN1 (config-if) #exit

ISDN1 (config) #isdn switch-type basic-net3// defining interchange types for ISDN

ISDN1 (config) #int BRI 0// Enter the base rate interface 0

ISDN1 (config-if) # IP Add 12.1.1.1 255.255.255.0// Configure IP Address

ISDN1 (config-if) #encapsulation PPP// Configure the package format for the link to PPP

ISDN1 (CONFIG-IF) #ppp authentication chap// Configure authentication as CHAP

ISDN1 (config-if) #isdn spid1 32177820010100// Specify SPID

ISDN1 (config-if) #dialer map IP 12.1.1.2 name ISDN2 7782001// Defining dial Peers

ISDN1 (config-if) #ppp mutillink// turn on Multilink for channel aggregation

ISDN1 (config-if) #dialer load-threshold either// configured with a threshold of 70, when the threshold is reached, either inbound or outbound traffic is dialed into the second B-Channel

ISDN1 (config-if) #dialer idle-timeout// Configure the idle time value to disconnect when there is no data traffic for how long the interval has elapsed.

ISDN1 (config-if) #dialer-group 1// apply on-demand dial 1

ISDN1 (config-if) #no sh// turn on BRI 0 Port

ISDN1 (config-if) #exit// Exit

ISDN1 (config) #dialer-list 1 Protocol IP permit// create on-demand dial 1 allows any IP traffic

ISDN1 (config) #ip Route 2.2.2.0 255.255.255.0 12.1.1.2// Configure static Routes

2, Configuration ISDN2

router>en

Router#conf T

Router (config) #host ISDN2

ISDN2 (config) #username ISDN1 pass Kkfloat

ISDN2 (config) #int loopback0

ISDN2 (config-if) #ip add 2.2.2.2 255.255.255.0

ISDN2 (config-if) #exit

ISDN2 (config) #isdn Switch-type basic-net3

ISDN2 (config) #int Bri 0

ISDN2 (config-if) #ip add 12.1.1.2 255.255.255.0

ISDN2 (config-if) #encapsulation PPP

ISDN2 (CONFIG-IF) #ppp authentication chap

ISDN2 (config-if) #isdn spid1 32177820020100

ISDN2 (config-if) #dialer map IP 12.1.1.1 name ISDN1 7782002

ISDN2 (config-if) #ppp Mutillink

ISDN2 (config-if) #dialer load-threshold 70

ISDN2 (config-if) #dialer Idle-timeout 90

ISDN2 (config-if) #dialer-group 1

ISDN2 (config-if) #no sh

ISDN2 (config-if) #exit

ISDN2 (config) #dialer-list 1 Protocol IP Permit

ISDN2 (config) #ip Route 1.1.1.0 255.255.255.0 12.1.1.1

3. Test the ISDN network:

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This article from "Liu Fengyuan" blog, declined reprint!

CCNA Experiment 32 ISDN