3Com Router 3000 Ethernet FamilyConfiguration Guide Chapter 1 Interface Configuration Overview3Com Corporation1-3Table 1-4 Enable/disable the interface to send UPDOWN trapsOperation CommandEnable the interface to send UPDOWNtraps enable snmp trap updownDisable the interface to send UPDOWNtraps undo enable snmp trap updownBy default, the interface can send UPDOWN traps.1.2.5 Testing Interface/Line LoopsLoop test is available only on synchronous serial interfaces (including those formed onE1/T1/E1-F/T1-F interfaces) using SD701 chips.Perform the following configuration in any view.Table 1-5 Perform a loop test on an interface/lineOperation CommandPerform a loop test on an interface/linelooptest [ -c count | -p { pattern | special{ ascending | descending | random } } |-s packetsize | -t timeout ] * interfacetype numberBy default, test packets are sent five times; test pattern is 0x55 interleaved with 0xAA;test packet size is 52 bytes with the 12-byte header excluded; and timeout waiting forreceiving a sent test packet is 2000 milliseconds.For a line with a low transmission speed, increase the timeout waiting for receiving asent test packet.1.2.6 Configuring Other Interface ParametersBefore configuring an interface, you should make sure that you have fully understoodthe networking requirements and the networking diagram. Configuring an interfaceincludes the following tasks:z If the interface is a physical one, you should specify its connection state, operatingmode, and the relevant operating parameters.z If the interface is a WAN interface, you should configure the link layer protocolagreed by the connected remote interface as well as the operating parameters.z Assign a network protocol (such as IP) address to the interfacez Configure the static routing of the destination network reachable through theinterface, or configure the working parameters of the dynamic routing protocol onthe interface.
