Magnum 8000X Mixed-Media Fiber Hubs

Installation and User Guide (05/ 02)

 

 

 

1.Address Learning (Address Table Maintenance)

10Mb Domain : 10Mb packets are

 

 

 

 

100Mb Domain : 100Mb packets are

forwardedwhen the destination addresse is

 

 

 

NOTin the 10Mb domain address table.

 

 

 

forwardedwhen the destination address is

 

 

 

 

 

NOTin the 100Mb domain address table.

10Mb Domain : 10Mb packets are

10

 

BUS

100

 

filteredwhen the destination address is

 

 

 

 

 

 

 

 

 

 

in the 10Mb domain address table.

Bridge Module

 

10 Mb Domain

100 Mb Domain

 

10

BUS

100

10 Mb Traffic

 

100 Mb Traffic

 

 

 

 

 

 

 

 

 

100Mb Domain : 100Mb packets are

 

 

 

 

 

filteredwhen the destination address is

 

 

 

 

 

in the 100Mb domain address table.

The Magnum 8000X bridge module is a state machine design which has a total address table capacity of 8K addresses. With a large address table, a Magnum 8000X can serve the needs of a medium-sized to large network. Table 4.2 shows what filter / forward action the Magnum 8000X will take in each packet-processing situation, and when a new node address will be added to the internal Address Table. When a new node-address packet comes into a port for the first time, then the new source address is “learned” at the same time that the packet is forwarded. After learning, subsequent packets from the same node address are routinely processed. The address tables are flushed periodically to update the network status and to purge any inactive stations from the tables of both domains.

 

Figure 4.2 : Filtering vs. Forwarding in Dual Speed 8000X

Packet

Source

Destination

Address Table

Filter/Forward

Source

Address

Address

Maintenance

Action

10 Mbps

Not in table

Not in table

Add source to table

Forward

10 Mbps

Not in table

In table

Add source to table

Filter

10 Mbps

In table

Not in table

None

Forward

10 Mbps

In table

In table

None

Filter

100Mbps

Not in table

Not in table

Add source to table

Forward

100Mbps

Not in table

In table

Add source to table

Filter

100Mbps

In table

Not in table

None

Forward

100Mbps

In table

In table

None

Filter

 

Table 4.2: 8000X Dual-Speed Hub Functionality

2.Throughput Increase

By selectively forwarding packets from each domain to the other domain based on its switching (bridging) logic, the Magnum 8000X increases the available bandwidth for the users on both sides of the network. As shown in Figure 4.2, it keeps the local traffic on each side contained, preventing unnecessary packets and bad packets from traveling to the other domain and using up bandwidth needlessly over there. This

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GarrettCom manual Address Learning Address Table Maintenance, 8000X Dual-Speed Hub Functionality, Throughput Increase

8000X specifications

The GarrettCom 8000X series represents a significant advancement in industrial networking technology, designed specifically for demanding environments that require robust and reliable communication solutions. Known for its versatility and resilience, the 8000X series caters to various industries, including transportation, utilities, and automation, making it a go-to choice for mission-critical applications.

One of the main features of the 8000X is its modular design, allowing users to customize the switch according to their specific networking needs. This feature provides the flexibility to add and remove modules seamlessly, ensuring that the network can adapt as requirements change over time. The modularity also contributes to easier maintenance and upgrades, reducing downtime and enhancing operational efficiency.

The 8000X series is built to operate in harsh environments, with an operating temperature range of -40°C to 85°C, making it suitable for outdoor and industrial applications. Its rugged chassis is designed to withstand vibration and shock, ensuring reliability even in the most challenging conditions.

Equipped with both Ethernet and fiber optic ports, the 8000X series supports a variety of network topologies and facilitates extensive connectivity options. It usually offers multiple gigabit Ethernet ports, allowing for high-speed data transmission. This feature is crucial for applications that demand real-time data processing, such as video surveillance and process control systems.

In terms of security, the GarrettCom 8000X series incorporates advanced features such as VLAN support, access control lists (ACLs), and network monitoring tools. These security measures are essential for protecting sensitive data and maintaining network integrity against potential threats.

The device also supports various network protocols, including IPv4, IPv6, and various industrial protocols such as Modbus. This compatibility ensures that the 8000X can seamlessly integrate into existing infrastructures and communicate effectively with other devices and systems.

Furthermore, the GarrettCom 8000X series is equipped with built-in redundancy features, such as dual power supplies and support for Rapid Spanning Tree Protocol (RSTP), which enhance network reliability and minimize the risk of downtime.

Overall, the GarrettCom 8000X series stands out with its robust construction, modularity, and advanced technology, making it an ideal solution for organizations seeking reliable networking equipment capable of performing under extreme conditions. Its features make it a vital asset for industries focused on maintaining high-performance communication standards.