Standards Compliance for SNMP TrapsB-2 8774-A2-GB20-10December 1998linkUp and linkDownThe link SNMP traps are: linkUp – The unit recognizes that one of the communication interfaces isoperational. linkDown – The unit recognizes that one of the communication interfaces isnot operational.The network and synchronous port interfaces (physical sublayer) are representedby an entry in the MIB-II interfaces table and supported by the DS1 MIB.The following list describes the conditions that define linkUp and linkDown:linkUp/Down Variable-Bindings ifIndex (RFC 1573)This object provides the index into the ifTable and potentially into tables in other MIBs.The values of ifIndex are the same for all models, although not all indexes aresupported for each model.The ifIndex included with the trap consists of the slot number times 1000, plus:– 2 SDSL Network Interface, Port 1– 3 SDSL Network Interface, Port 2– 4 SDSL Network Interface, Port 3– 5 SDSL Network Interface, Port 4– 10 DSX-1 Port, Port 1– 11 DSX-1 Port, Port 2– 12 DSX-1 Port, Port 3– 13 DSX-1 Port, Port 4 ifAdminStatus (RFC 1573)This object specifies the operational state of the interface:– up(1)SDSL Network: DSL link is established.Synchronous Data Port: Port is enabled and both CTS and DSR are ON.– down(2)SDSL Network: DSL link is not established.Synchronous Data Port: Port is disabled or CTS or DSR is OFF.– testing(3)A test is active on the interface. ifOperStatus (RFC 1573)This object contains the same value as ifAdminStatus. ifType (RFC 1573)This object is the type of interface:– propPointToPointSerial(22)Used for the synchronous data ports and EOC.– DS1 (18)Used for DSX-1 T1 interface– sdsl(96)Used for the SDSL network interface.