Chapter 3 Configuring the Cisco 1604 Router

Verifying BRI Configuration

Verifying BRI Configuration

Step 1 Enter the no shutdown command. The following output messages appear:

robo-austin(config-if)# no shutdown robo-austin#

00:45:01: %LINK-3-UPDOWN:Interface BRI0:1, changed state to down

00:45:01: %LINK-3-UPDOWN:Interface BRI0:2, changed state to down

00:45:01: %LINK-3-UPDOWN:Interface BRI0, changed state to up robo-austin#

00:45:02: %ISDN-6-LAYER2UP:Layer 2 for Interface BR0, TEI 100 changed to up

00:45:02: %ISDN-6-LAYER2UP:Layer 2 for Interface BR0, TEI 101 changed to up robo-austin(config-if)#

This example shows the BRI0:1 and BRI0:2 states change to “down” because the previous state was “administratively down.” The BRI0 D channel changes to “up” as it spoofs for the two B channels. After the D channel finds the B channels, the B channels change state to “up.” The Cisco 1604 communicates with the telephone switch and receives its TEI numbers for its two B channels.

Step 2 Enter the show isdn status command to check the Cisco 1604’s ISDN status:

robo-austin#show isdn status

 

Global ISDN

Switchtype = basic-ni

 

ISDN BRI0 interface

 

dsl

0, interface ISDN Switchtype = basic-ni

 

Layer 1

Status:

 

ACTIVE

 

Layer 2

Status:

 

TEI

= 100, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

 

TEI

= 101, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

 

Spid Status:

 

TEI

100, ces = 1, state = 5(init)

 

 

spid1 configured, no LDN, spid1 sent, spid1 valid

 

 

Endpoint ID Info: epsf = 0, usid = 2, tid = 1

 

TEI

101, ces = 2, state = 5(init)

 

 

spid2 configured, no LDN, spid2 sent, spid2 valid

 

 

Endpoint ID Info: epsf = 0, usid = 4, tid = 1

 

Layer 3

Status:

 

0 Active Layer 3 Call(s)

 

Activated dsl 0 CCBs = 0

 

Total Allocated ISDN CCBs = 0

 

The fields in the output example resulting from Step 2 above are described in Table 3-2:

Table 3-2 Field Descriptions for the show isdn status Command Output

 

 

 

Field

Description

 

 

 

BRI0

Basic Rate Interface. The BRI 0 interface corresponds to DSL-0, which has three channels (2B +D).

 

 

DSL

Digital Subscriber Line.

 

 

TEI

Terminal Equipment Identifier.

 

 

CCB

Call Control Block.

 

 

LDN

Local Directory Number.

 

 

SPID

Service Profile Identifier.

 

 

 

Cisco IOS Dial Services Quick Configuration Guide

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Cisco Systems 1604 manual Verifying BRI Configuration
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1604 specifications

Cisco Systems 1604 is a multifaceted router that exemplifies the evolution of networking technology. Introduced in the 1990s, it was designed primarily for interconnecting local area networks (LANs) and wide area networks (WANs). As one of the early routers in the Cisco family, the 1604 laid the groundwork for numerous advancements in the networking space.

One of the standout features of the Cisco 1604 is its modular design. This architecture allows users to customize the router according to their specific needs by adding various modules and interface cards. This adaptability made it popular among organizations that required flexible networking solutions. The router supports multiple types of interfaces including Ethernet, Token Ring, and serial connections, accommodating a variety of networking environments.

In terms of performance, the Cisco 1604 offers impressive capabilities for its time. It supports both routing and bridging functions, enabling it to seamlessly integrate different types of networks. The router can handle up to 4Mbps of bandwidth, sufficient for small to medium-sized network environments. Its built-in memory capacity allows for efficient processing, providing a reliable platform for data communications.

The Cisco 1604 is built on Cisco's proprietary IOS (Internetwork Operating System), which is a critical component of its operation. IOS provides a robust command-line interface for configuration and management, facilitating advanced networking tasks such as routing protocols, security features, and network diagnostics. The support for multiple routing protocols, including RIP, OSPF, and EIGRP, enhances its functionality and compatibility with diverse network architectures.

Security features in the Cisco 1604 are notable, providing essential tools to safeguard data transmitted across networks. It supports various access control lists (ACLs) that enable administrators to regulate network traffic and restrict unauthorized access.

Moreover, the Cisco 1604 was designed with reliability in mind. It includes features like automatic keep-alives for connection monitoring and error-correction protocols to ensure consistent performance.

In conclusion, the Cisco Systems 1604 router represents a significant milestone in networking technology. Its modular design, high performance, advanced IOS capabilities, and robust security measures make it a noteworthy solution for businesses looking to build effective networking infrastructures. While newer models have surpassed its capabilities, the legacy of the Cisco 1604 continues to influence modern networking practices and designs.
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