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SNMP MIBs and Traps, and RMON Alarm Defaults
B-10
9820-A2-GB20-20June 2000
Table B-6. linkUp and linkDown Variable-Bindings (2 of 2)
Interface Possible CauseVariable-Bindings
Physical Sublayer, continued
Ethernet Port H ifIndex (RFC 1573)
H ifAdminStatus
(RFC 1573)
H ifOperStatus (RFC 1573)
H devLastTrapString
(devHealthAndStatus.-
mib)
H linkDown – Communications
are not possible on the port.
String:
‘Ethernet $alarmString down.’
H linkUp – Communications are
now possible on the port.
String:
‘Ethernet up.’
Logical Link Sublayer
Frame Relay
(Supported by the
media-specific Frame
Relay Services MIB.)
H ifIndex (RFC 1573)
H ifAdminStatus
(RFC 1573)
H ifOperStatus (RFC 1573)
H devLastTrapString
(devHealthAndStatus.-
mib)
H linkDown – LMI is down for
the LMI Protocol configured,
or Frame Relay link is
disabled.
If the LMI Protocol is not
configured, a linkUp/linkDown
trap is based solely upon
whether the interface is
enabled or disabled.
Strings:
‘$ifString down.’ No alarms
exist on the link due to LMI.
‘$ifString LMI down.’ No
alarms exist on the link
because LMI is down.
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
H linkUp – LMI is up or Frame
Relay link is enabled.
String:
‘$ifString up.’