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Cabletron Systems 1800, FRX4000, FRX6000 manual Inverse ARP, Proxy ARP, Unnumbered Interface

Models: 1800 FRX4000 FRX6000

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IP Interface Configuration

Inverse ARP

By selecting Enabled in the Inverse ARP Þeld, you can conÞgure a frame relay interface without specifying a destination IP address. Once the frame relay interface and its DLCI become active, the IP function in the FRX or SmartSwitch 1800 device sends an Inverse ARP (Address Resolution Protocol) request over the interface. The response will contain the destination IP address, allowing the IP interface to become active.

If an ARP request from the FRX or SmartSwitch 1800 receives no response within Þve seconds, the request will be resent every Þve seconds for an additional Þve times. If there is still no response, a 30-second timer will start. When the timer expires, the resend sequence will be repeated.

If you have upgraded your Þrmware to version 4.0, then the default value for IP interfaces that have already been conÞgured is Disabled. If you are adding a new interface, the default value is Enabled. If you select Disabled, you must enter a Destination Address (see deÞnition above).

If Inverse ARP is changed from Enabled to Disabled, the device will immediately generate an Inverse ARP request.

Proxy ARP

This parameter is only conÞgurable if you have selected a LAN interface as your Interface Type, and determines whether Proxy ARP (Address Resolution Protocol) will be supported. Proxy ARP allows an FRX or SmartSwitch 1800 to respond to ARP requests on one subnet for a host on another subnet. The device that sent the ARP request thinks the FRX or SmartSwitch 1800 is the destination host.

If an ARP request is received, the IP function in the FRX or SmartSwitch 1800 checks the address against the Source Address conÞgured on the IP interface. If the addresses match, a reply will be sent. If the addresses do not match, and Proxy ARP is Disabled, no response will be sent. If the addresses do not match, and Proxy ARP is Enabled, the IP function will check to see if the device has a route to the host or the hostÕs network. If there is a route, and the route is reachable and is not on the same interface on which the ARP request was received, an ARP response will be sent.

The default value for this parameter is Disabled.

Unnumbered Interface

This parameter is only conÞgurable if you have selected Frame Relay or X.25 as your Interface Type. It allows a point-to-point frame relay interface to be conÞgured without specifying a Source Address (see above). If Yes is selected, the address of the lowest Interface Number in the FRX or SmartSwitch 1800 is used as a default source IP address. (The lowest Interface Number is not the lowest address, but the lowest number, in the range 1 - 257, that identiÞes the interface.) It doesnÕt matter what type the interface is. All unnumbered interfaces on the device will use the same default source IP address.

If a new interface with a lower number is added, that interfaceÕs IP address will become the new default source IP address, but only after you reboot the device.

9-8

Configuring IP Interfaces

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Cabletron Systems 1800, FRX4000, FRX6000 manual Inverse ARP, Proxy ARP, Unnumbered Interface
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1800, FRX4000, FRX6000 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.