Perle Systems manual P840 Router Feature Definitions, Telnet, Link Compression

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Introduction

P840 Router Feature Definitions

Telnet

A Telnet LAN station or another P840 router has the ability to connect to the Operator Interface of any P840 router supporting the Telnet feature. With the Telnet feature, all of your P840 routers may be managed from a single point.

Once a connection is established all of the menus of the other bridge/router are now available on the bridge/router that initiated the connection. All menu operation on the initiating bridge/router is suspended during the connection. Entering a control-C character <^C> at any time during the connection will cause a disconnection, and you will be back to the menu of the first bridge/router.

To implement the Telnet feature, each bridge/router requires an IP address (see the Internet Set-Up Menu). It is advisable to assign an IP address to each P840 router in your network that you wish to use to make Telnet connections.

Once a bridge/router has an IP address, any other P840 router may connect to it by entering the IP address in the connection attempt.

The IP addresses of the other P840 routers must be entered manually each time you wish to make a connection. The IP address of another bridge/router may be mapped to a name to simplify the connection process. Each P840 router may have a different set of names for corresponding IP addresses. Refer to the Remote Access Set-Up Menu for more information on adding names to the bridge/router.

If a bridge/router does not have an IP address, Telnet connections cannot be initiated or received.

If a Telnet connected bridge/router receives a second connection attempt from another bridge/router the connection attempt will be ignored.

Connecting to a bridge/router while the remote bridge/router menu system is operating with a different terminal setting may cause unexpected screen errors. Once the connection to the bridge/router has been established, it is recommended that the operator change the terminal setting to be the same as the initiating device.

When a Telnet connection is made to a bridge/router, ensure that the Telnet session is in character mode, and carriage return padding (or translation) is set to NULL (or no translation). The extra character sent when carriage return padding is on will cause some displays to behave erratically.

Link Compression

The P840 router’s optional compression feature multiplies the effective data throughput across wide area links. The exact amount a given transmission can be compressed is dependent upon the type of data being transferred over the wide area network. As an example, because of their repetitive make-up, most graphics and database files can easily be compressed by a ratio of 6:1. In contrast, other types of files (such as binary files), that are not as repetitive, typically yield a compression ratio of 2:1. It should also be noted that compression ratios are entirely dependent upon the make-up of the specific file — while it may be possible to compress a given ASCII file far beyond the 6:1 ratio, a different ASCII file may only compress to a ratio of 4:1 or lower.

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Contents Perle P840 P840 Router IntroductionProxy ARP ARP-Address Resolution ProtocolIP Routing and the P840 Router Complete IP Connection IP Header Details Quench Icmp MessagesUnreachable RedirectTime and Mask server Update MechanismRIP-Routing Information Protocol PingStation Address Learning Bridging and the P840 RouterInitial Bridging Process Aging Timer Aging Exception Filled Address TableAddress Purging Link Compression P840 Router Feature DefinitionsTelnet Typical Compression Ratios by File Type Multipoint WAN TopologiesBandwidth On Demand MultilinkTime of Day Connect Application Operating Software UpgradesCall Establishment Methods P840 Isdn Connection ManagementWide Area Network Topologies Supported Auto-Call Time-of-Day Connections Isdn Connection ManagementManual Call Address ConnectCombination Connection ProcessInteresting Traffic Idle TimerProtocol Awareness Suspension ProcessSuspended Server P840 Session Participation SpoofingSuspension of TCP/IP Sessions IP SpecificsTermination Process IP Address ConnectPinout Information Console ConnectorEvent logs Event LogsEvent Logs Event Logs Event Logs Event Logs Event Logs Alarm logs Event Logs Event Logs Event Logs Code Description Code Event Logs Event Logs Event Logs Event Logs Event Logs PPP Security logs Security MAC Address FilteringSecurity-Filter if Destination FilteringSecurity-Filter if Source Security-Forward if Destination Security-Forward if Source FilteringFiltering Protocol Discrimination Pattern Filter OperatorsBridge Pattern Filtering IP, and no more Protocol Type FieldInternet Protocol IP Filter all IP PacketsFiltering Filter all except TCP/IP Transport Control Protocol / Internet Protocol TCP/IPFilter only TCP/IP Filter all IP without TCP trafficEthernet Multicasting Bandwidth ConservationFilter all DEC Ethernet BroadcastingEthernet Station Addresses General RestrictionsInternet Addresses Mask would be 6-010203040506&12-0800&23-06 Example Mask CombinationsIP Router Pattern Filtering Frame Formats Ethernet Type Codes Octet Locations on an IP Routed TCP/IP Frame Octet Locations on a Bridged XNS Frame

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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