Standards Compliance for SNMP Traps

D-3
7112-A2-GB20-20 March 1998

The following table describes the conditions that define linkUp and linkDown for

each interface:

Interface linkUp/Down

Variable-Bindings Possible Cause

Physical Sublayer – Represented by the entry in the MIB II Interfaces Table.
T1 network
(Supported by the
media-specific ds1
MIB.)
ifIndex (RFC 1573)
ifAdminStatus
(RFC 1573)
ifOperStatus (RFC 1573)
ifType (RFC 1573)
dsx1LineStatus
(RFC 1406)
linkDown – One or more
alarm conditions are active on
the interface.
Alarm conditions include:
– Loss of Signal
– Out of Frame
– Alarm Indication Signal
– Excessive Error Rate
– Yellow Alarm
linkUp – No alarms on the
interface.
Synchronous User
Data Port
(Supported by the
media-specific
RS232-Like MIB.)
ifIndex (RFC 1573)
ifAdminStatus
(RFC 1573)
ifOperStatus (RFC 1573)
ifType (RFC 1573)
linkDown – One or more
alarm conditions are active on
the interface.
Alarm conditions include:
– DTR Off (only if the DTE
supports the DTR lead and
the port is configured to
monitor DTR.
– RTS Off (only if the DTE
supports the RTS lead).
linkUp – No alarms on the
interface.