Filtering

4From the MAC ADDRESS FILTERS MENU, make sure that the Filter Operation is currently set to “negative”.

This will cause the MAC Address Filters specified to be used for forwarding frames with the specified MAC addresses.

5At this menu, enter a 1.

This will place you at the first EDIT MAC ADDRESS FILTER MENU screen. At the prompt enter the MAC address for which you want to specify the filter.

6Enter the 12-digit Ethernet address of the Personal Computer system in the following format: 010203040506 (enter a Return)

The edit screen will fill in the information that the table knows about this address. For this example, let us assume that it knows that the address status is [not present] and is of [unknown] location.

In this example, the bridge/router is not aware of this station yet. The station has probably not been active for the bridge/router to “learn” any information about it.

Therefore, you will have to tell the bridge/router a little bit more about the station.

7Enter a 2 to enter the location of the station.

8The bridge/router will prompt you for the LAN that the station is located on; enter the name of this bridge/router’s LAN (LAN456789 for example).

Note that the Status of the address is marked as [present], the location is updated to LAN456789 and the Permanent entry is [enabled].

9Enter a 3 to [enable] the “Forward if Source ” parameter. The edit screen will be updated to show the new information.

At this point, the address is added to the permanent filter table of the local LAN. This entry, therefore, will not be subject to the aging timer, and will remain active until it is removed from the permanent entry table.

When a frame of information is seen on the local LAN that contains the address of the Personal Computer in the source field of the frame, the bridge/router will forward it. All other frames seen on the local LAN that are destined for the remote LAN will be filtered.

Most programmable filtering options may be used for security purposes. The examples above are specific instances where the two “Forward if” functions may be used. Filter masks are presented in subsequent pages of this section.

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Perle Systems P840 manual Filtering
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P840 specifications

Perle Systems is renowned for its high-performance networking hardware, and the Perle P840 model exemplifies this reputation with its advanced features and technologies. Designed for small to medium-sized enterprises, the P840 serves as a versatile and reliable solution for connectivity needs.

One of the main features of the Perle P840 is its robust network performance, supporting both Ethernet and serial connectivity. With support for RS-232, RS-422, and RS-485 interfaces, the P840 enables seamless integration of legacy devices into modern network architectures, allowing businesses to leverage existing infrastructure without the need for extensive upgrades.

The P840 also boasts advanced security features to protect sensitive data during transmission. It supports SSL encryption and VPN capabilities, ensuring that data travels securely across the network. Additionally, it implements strong authentication protocols, providing organizations with peace of mind knowing that their communications are safeguarded against potential threats.

Another standout characteristic of the P840 is its flexibility in configuration. It offers multiple port configurations, allowing for customization based on specific user needs. With options for both managed and unmanaged modes, the device can easily adapt to various network environments. This flexibility makes it suitable for diverse applications, including industrial automation, process control, and telecommunications.

The Perle P840 is designed for durability and reliability, featuring a rugged enclosure that can withstand demanding environments. Its solid-state components reduce the risk of failure, contributing to increased uptime and lower maintenance costs. Furthermore, the compact design allows for easy installation in tight spaces, making it a practical choice for various deployment scenarios.

In terms of management and monitoring, the P840 includes an intuitive web-based interface, enabling administrators to configure settings and monitor network performance effortlessly. SNMP support further enhances management capabilities, allowing for integration into larger network management systems.

Overall, the Perle P840 stands out as a powerful solution for enterprises seeking seamless connectivity, robust security, and flexibility in configuration. Its combination of advanced features and durable design makes it an ideal choice for industries requiring reliable serial and network connectivity in challenging environments. With the P840, businesses can build a resilient networking infrastructure that supports their growing demands while safeguarding their critical data.
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