Multi-Tech Systems FR3060 - Manual (Page 62)

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MultiFRAD 3000-Series User Guide
IP Statistics
IP is a connection-less network protocol that resides in the network layer of a conventional OSI
layered model. Depending on what is going on at the application layer, IP will typically use one of two
transport layer protocols. User Datagram Protocol (UDP), a connection-less transport layer protocol
used with TFTP or SNMP; and Transport Control Protocol (TCP) is a connection-oriented transport
layer protocol used with FTP, Telnet, and SMTP.
UDP makes use of the port concept and has no measures for flow control, reliability, or error
recovery. It is used when the full services of TCP are not required, and the reliability measures must
be assumed by another layer.
TCP works well in environments where the reliability measures are not assumed by other layers. It is
connection-oriented and has a full range of services.
For the most part these statistics are informational, and their use as a troubleshooting tool will be
contingent on the applications running in the upper layers. For instance, if you were having problems
connecting to MultiFRAD’s web server, you would look under the TCP section to see if any
connections are being established. If not, that may indicate the web server is not enabled. Or, if you
were having problems establishing a remote connection through TFTP, you could look in the UDP
section to see if any packets are being received. If not, you may need to review your network
addressing.
The Port Tab allows you to view generic IP statistics for a given Ethernet IP Port. Either the Ethernet
(LAN) port, or any logical IP WAN port statistics can be viewed in this window. The practicality of
statistical use in troubleshooting will depend on the application running in the upper layers.