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Standards Compliance for SNMP Traps
B-3
8700-A2-GB20-00
April 2000
linkUp and linkDown
The link SNMP traps are:
H linkUp – The unit recognizes that one of the communication interfaces is
operational.
H linkDown – The unit recognizes that one of the communication interfaces is
not operational.
The network and synchronous port interfaces (physical sublayer) are represented
by 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
H ifIndex (RFC 1573)
This object provides the index into the ifTable and potentially into tables in other MIBs.
The ifIndexes supported are:
– 3–10 DSL Network Interface
– 15–22 DSX-1 or G.703 Port
– 39–46 EOC Management Link
H ifAdminStatus (RFC 1573)
This object specifies the operational state of the interface:
– up(1)
The interface is enabled.
– down(2)
The interface is disabled.
H ifOperStatus (RFC 1573)
This object specifies the operational state of the interface:
– up(1)
DSL Port: DSL link is established and no alarms exist.
DSX-1 or G.703 Port: No alarm conditions exist.
EOC: Based on the state of the link layer protocol.
– down(2)
DSL Port: DSL link is not established or alarms exist.
DSX-1 or G.703 Port: Alarm condition exists.
EOC: Based on the state of the link layer protocol.
– testing(3)
DSL, DSX-1 or G.703 Port: A test is active on the port.
– dormant(5)
DSL Port: DSL link is negotiating.