Blocked Flag, Logical DCE | Cabletron Systems FRX6000, FRX4000, 1800

Frame Relay Status and Conﬁguration

¥For the FRX6000, ports 0-7 on each RLP are determined by the Line Interface Card (LIC) and attached I/O cables. Only the valid interfaces will be listed from the menu button. Possible interfaces are: RS-232, V.35, RS-449, RS-530 and X.21. (RS-449, RS-530, and X.21 interfaces require an RS-422 LIC.)

Blocked Flag

This value will cause the port to be enabled (if No) or disabled (if Yes) when the device is powered up or re-booted.Whichever state is selected, the port will remain in that state until this value is changed or until an enable or disable action is performed.

Logical DCE

This parameter deÞnes the portÕs role as logical DCE (if Yes) or logical DTE (if No). The port conÞgured as the DTE serves as the user-side equipment, sending data to an interface device (DCE, or network-side equipment) for encapsulation in a frame relay frame and transmission onto the frame relay network. The DTE also receives de-encapsulated data from the DCE for transmission onto its local network. Each port must be conÞgured for the opposite value of that conÞgured for its link partner Ñ that is, a logical DCE must be connected to a logical DTE, and vice versa.

NOTE

Note that logical and physical DCE and DTE settings are independent of one another; a port can be both a logical DTE and a physical DCE.

Generate Clock

This setting speciÞes whether the port will generate the clock, or timing, necessary to synchronize trafÞc over the link. If the port is a physical DCE (as determined by the portÕs I/O cable interface), specify Yes, since the physical DCE generates clock. If the port is a physical DTE, specify No.

Receive Clock from DTE

If this parameter is set to Yes, it allows the clock (timing) signal to be looped back from the DTE using the Terminal Timing (TT) signal, which can be helpful on high-speed lines. Generally, if the local interface is a physical DCE and the line speed is above 256 Kbps, this parameter should be set to Yes; however, make sure the DTE is conÞgured to provide the terminal timing.

Link Layer Management

When Link Layer Management is active, the protocol in use will verify and maintain the integrity of the link. The setting of this value determines whether link status enquiries will be used, and what form they will take:

no LMI	No Local Management Interface (LMI). No status
	enquiries will be used; this setting essentially disables
	frame relayÕs management abilities. LMI will prevent any

5-6	Conﬁguring Frame Relay Ports

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.

Cabletron Systems FRX6000, 1800 Blocked Flag, Logical DCE, Generate Clock, Receive Clock from DTE

Models: 1800 FRX4000 FRX6000