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SNMP MIBs and Traps, and RMON Alarm Defaults
B-10
9123-A2-GB20-10July 2000
Table B-6. linkUp and linkDown Variable-Bindings (2 of 2)
Interface Possible CauseVariable-Bindings
Physical Sublayer (cont’d)
Ethernet Port H ifIndex (RFC 1573)
H ifAdminStatus
(RFC 1573)
H ifOperStatus (RFC 1573)
H devLastTrapString
(devHealthAndStatus.-
mib)
H linkDown – Communication is
not possible over the Ethernet
port.
Strings:
‘$ifString down.’
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
H linkUp – Communication on
the port is restored.
String:
‘$ifString up.’
Logical Link Sublayer
Synchronous
Data Port
Service Side of the
Frame Relay UNI
(Supported by the
media-specific Frame
Relay Services MIB.)
H ifIndex (RFC 1573)
H ifAdminStatus
(RFC 1573)
H ifOperStatus (RFC 1573)
H devLastTrapString
(devHealthAndStatus.-
mib)
H linkDown – LMI is down for the
LMI Protocol configured,
3
or
Frame Relay link is disabled.
‘$ifString LMI down.’ No
alarms exist on the link.
(e.g., ‘Sync Data Port S01P1
frame relay link “Port-1”
LMI down.’)
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
H linkUp – LMI is up or Frame
Relay link is enabled.
String:
‘$ifString up.’
Network
DTE Side of the
Frame Relay UNI
(Supported by the
media-specific Frame
Relay DTE’s 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,
3
or
Frame Relay link is disabled.
Strings:
‘$ifString LMI down.’
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
H linkUp – LMI is up or Frame
Relay link is enabled.
String:
‘$ifString up.’
3
If the LMI Protocol is not configured, a linkUp/linkDown trap is based solely upon
whether the interface is enabled or disabled.