Chapter 14

Configuring IP Routing

Introduction

The IP functions in the SmartSwitch 1800 support routing of IP (internet protocol) traffic among IP devices on LANs and routed subnetworks, via frame relay or X.25. Routing can be dynamic (RIP versions 1 and 2 are supported), and static routes can be configured.

A SmartSwitch 1800 can also be configured to act as a gateway, forwarding IP packets it receives.

IP functionality also allows support of an SNMP agent in a SmartSwitch 1800. (SNMP configuration is described in Chapter 17.)

IP Addressing

IP devices are identified by IP addresses. An IP address is 32 bits, divided into a network identifier followed by a node (host) identifier. This allows the Internet Pro- tocol to identify each physical network and each node on each physical network. IP addresses are generally shown in dotted decimal notation, which means that each octet is represented by a decimal number, and octets are separated by dots, as

in: 130.6.52.245 .

IP networks are divided into classes, with this addressing scheme:

●Class A allows up to 127 network numbers and several million node numbers: Bit 0 is 0, bits 1–7 are the network identifier, and bits 8–31 are the node iden-

tifier. In dotted decimal notation, the range of Class A addresses is 1.0.0.0– 127.255.255.255 .

Network

Node

The valid range in SmartSwitch 1800 configuration is 1.0.0.0– 126.255.255.255.

●Class B allows up to approximately 16,000 network numbers, and approxi- mately 65,025 node numbers: Bits 0–1 are 10, bits 2–15 are the network iden- tifier, and bits 16–31 are the node identifier. In dotted decimal notation, the range of Class B addresses is 128.0.0.0–191.255.255.255 .

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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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