Chapter 3 Configuring the Cisco 1604 Router

Verifying the Ethernet Interface Configuration

Step 2 Bring up the interface. This command changes the state of the interface from administratively down to up.

robo-austin(config-if)# no shutdown

Verifying the Ethernet Interface Configuration

To verify the Cisco 1604’s Ethernet interface configuration:

Step 1 Enter the show ip interface brief command, which enables you to quickly check the status of all router interfaces.

The field “administratively down” means that the interface is configured with the shutdown command.

Step 2 To bring the interface up, you must enter the no shutdown command. In the example below, the Status column refers to the ability to physically connect the network at Layer 1—needed for getting clocks (timing signals) and carrier signals. The Protocol column refers to the ability to see traffic flow, which typically occurs at the data link layer. For example, the Ethernet interface sends a loopback Ethernet packet out to itself through the Ethernet LAN:

robo-austin#show ip interface brief

 

 

 

Interface

IP-Address

OK? Method

Status

Protocol

BRI0

unassigned

YES unset

administratively down down

BRI0:1

unassigned

YES unset

administratively down down

BRI0:2

unassigned

YES unset

administratively down down

Ethernet0

10.1.4.1

YES manual

up

up

Serial0

unassigned

YES unset

administratively down down

In the next example, note that the status is up but the protocol is down. The following logging message appears at 00:40:20: “Unit 0, lost carrier. Transceiver problem?.” After the Ethernet cable is plugged into the Ethernet port, the interface comes up. See 00:40:25.

robo-austin#show ip interface brief

 

 

 

 

Interface

IP-Address

OK?

Method

Status

Protocol

BRI0

unassigned

YES

unset

administratively down down

BRI0:1

unassigned

YES

unset

administratively down down

BRI0:2

unassigned

YES

unset

administratively down down

Ethernet0

10.1.4.1

YES

manual

up

down

Serial0

unassigned

YES

unset

administratively down down

robo-austin#

 

 

 

 

 

00:40:20: %QUICC_ETHER-1-LOSTCARR: Unit 0,

lost carrier. Transceiver problem?

00:40:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0, changed sta te to up

robo-austin#

Cisco IOS Dial Services Quick Configuration Guide

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Cisco Systems 1604 Verifying the Ethernet Interface Configuration, Status, Ethernet0 10.1.4.1 YES manual, Down

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.