Perle P840 Reference Manual

Reference Manual All Software Versions Part number 5500063-12 © copyright 2002 by Perle Systems Ltd. ...

The P840 router provides IP routing combined with a protocol transparent bridge. This bridge/router combination is often the best solution to linking remotely located LANs where most of the traffic is IP with smaller amounts of traffic from other protocols such as NetBIOS or DEC LAT. The P840 router supports the widely imple ...

The P840 router may be used to route between subnets within the same network or between different networks. Network broadcasts sent within a subnet-routed environment will not be forwarded to the other subnets in the network. The procedure for establishing an IP connection through an IP router is explained on the ...

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 t ...

Every IP header has common fields of information. The layout of the information is always the same. Refer to the following diagram for a representation of the IP header. Figure 1 —2 IP Header Protocol The protocol section is used to indicate the protocol being used by the transport layer. This could be TCP, UDP, or somet ...

types of source routing: strict source routing and loose source routing. Strict source routing will contain a list of IP addresses of routers that must be used when the IP frame is sent through the network. Strict s ...

operation status. The ping message is basically a message asking “Are you alive?” The LAN device will reply with a message if it is active. Time and Mask server Two other ICMP messages are used to query the time and/or sub ...

The bridge portion of the P840 router is an Ethernet Media Access Control (MAC) level bridge providing an efficient means of interconnecting IEEE 802.3 Local Area Networks supporting a choice of standard Ethernet (10Base5), Thin Ethernet (10Base2) and Twisted Pair (10BaseT) interfaces. With the support of these in ...

may need to be forwarded. The learning process does not stop at this time, however: The bridge/router will continue learning new stations as they become active on a LAN segment. Local Destination Addresses When a frame ...

identifier, and a timer flag. Each time a particular address is looked up or added to the table, a timer flag is set for the “fresh” entry. When a time interval, defined by the Bridge/Router Manager expires, the a ...