Perle Systems P840 manual Complete IP Connection

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Introduction

The Complete IP Connection

The following are the steps that a frame of data will take when being transmitted from an originating station on an IP network to a destination station on a different IP network. In this example, the two networks are separated by a third network.

•Originating station will send an ARP request if it does not have the MAC address of the destination station.

•Local router will see ARP request and send an ARP reply to the originating station with the MAC address of the local router port.

•Originating station will send the data frame addressed to the IP address of the destination station and the MAC address of the local router port.

•Local router will receive the data frame and strip off the MAC portion. The resulting IP frame will be examined to determine the destination IP address.

•Local router will look in its routing table to find the IP address of the router to send the IP frame to next. The local router will see that the destination router is the next router.

•Local router will look in its ARP cache to find the MAC address of the destination router as determined by the IP address in the routing table.

•Local router will rebuild the complete frame with a new MAC header indicating the MAC address of the destination router. Remember that the local router does not alter the destination IP address, so the destination IP address will still be the IP address of the destination station.

•Destination router will receive the data frame and strip off the MAC portion. The resulting IP frame will be examined to determine the destination IP address.

•Destination router will look in its routing table to find the IP address of the router to send the IP frame to next. The destination router will see that the destination IP address is on a locally connected network.

•Destination router will look in its ARP cache to see if it has a MAC address for the destination IP address. If it does not have an entry, the destination router will generate an ARP request. The destination station will send an ARP reply.

•Destination router will rebuild the complete frame with a new MAC header indicating the MAC address of the destination station. The destination IP address once again will be unchanged and remain as the destination station IP address.

•Destination station will receive the data frame and process it.

If the destination station wishes to send a frame back to the originating station, the process will happen in the reverse direction.

If the path from the originating station to the destination station causes the frame to pass through more than two routers, the above process will simply be extended to include the interaction between the intermediate routers.

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Contents Perle P840 Introduction P840 RouterIP Routing and the P840 Router ARP-Address Resolution ProtocolProxy ARP Complete IP Connection IP Header Details Icmp Messages UnreachableRedirect QuenchUpdate Mechanism RIP-Routing Information ProtocolPing Time and Mask serverInitial Bridging Process Bridging and the P840 RouterStation Address Learning Aging Timer Address Purging Filled Address TableAging Exception Telnet P840 Router Feature DefinitionsLink Compression Typical Compression Ratios by File Type WAN Topologies Bandwidth On DemandMultilink MultipointOperating Software Upgrades Time of Day Connect ApplicationWide Area Network Topologies Supported P840 Isdn Connection ManagementCall Establishment Methods Isdn Connection Management Auto-Call Time-of-Day ConnectionsAddress Connect Manual CallConnection Process CombinationIdle Timer Protocol AwarenessSuspension Process Interesting TrafficP840 Session Participation Spoofing Suspended ServerIP Specifics Termination ProcessIP Address Connect Suspension of TCP/IP SessionsConsole Connector Pinout InformationEvent 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 MAC Address Filtering SecurityFiltering Security-Filter if DestinationSecurity-Filter if Source Security-Forward if Destination Filtering Security-Forward if SourceFiltering Bridge Pattern Filtering Pattern Filter OperatorsProtocol Discrimination Protocol Type Field Internet Protocol IPFilter all IP Packets IP, and no moreFiltering Transport Control Protocol / Internet Protocol TCP/IP Filter only TCP/IPFilter all IP without TCP traffic Filter all except TCP/IPBandwidth Conservation Filter all DECEthernet Broadcasting Ethernet MulticastingInternet Addresses General RestrictionsEthernet Station Addresses Mask Combinations Mask would be 6-010203040506&12-0800&23-06 ExampleIP 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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