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B. SNMP MIBs and Traps, and RMON Alarm Defaults
B-12
September
2002
9128-A2-GB20-80
Physical Sublayer
(continued)
BRI
(Supported through
ifIndex – RFC 1573.)
ifIndex – RFC 1573.)
ifIndex (RFC 1573)
ifAdminStatus
(RFC 1573)
(RFC 1573)
ifOperStatus (RFC 1573)
devLastTrapString
(devHealthAndStatus.-
(devHealthAndStatus.-
mib)
linkDown – One or more alarm
conditions are active on the
interface.
conditions are active on the
interface.
Strings:
‘$ifString down.’ No alarms
exist on the link.
‘$ifString down.’ No alarms
exist on the link.
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
shutdown.’ (Due to an
intentional shutdown.)
linkUp – No alarms on the
interface.
interface.
String:
‘$ifString up.’
‘$ifString up.’
Logical Link Sublayer
T1 Network,
BRI,
PRI,
Synchronous Data
Port
BRI,
PRI,
Synchronous Data
Port
Service Side of the
Frame Relay UNI
Frame Relay UNI
(Supported by the
media-specific Frame
Relay Services MIB.)
media-specific Frame
Relay Services MIB.)
ifIndex (RFC 1573)
ifAdminStatus (RFC
1573)
1573)
ifOperStatus (RFC 1573)
devLastTrapString
(devHealthAndStatus.-
(devHealthAndStatus.-
mib)
linkDown – LMI is down for the
LMI Protocol configured,
LMI Protocol configured,
or
Frame Relay link is disabled.
Strings:
‘$ifString down.’ No alarms
exist on the link due to LMI.
‘$ifString down.’ No alarms
exist on the link due to LMI.
‘$ifString LMI down.’ No alarms
exist on the link. (e.g., ‘Sync
Data Port S01P1 frame relay
link “Port-1” LMI down.’ )
exist on the link. (e.g., ‘Sync
Data Port S01P1 frame relay
link “Port-1” LMI down.’ )
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
shutdown.’ (Due to an
intentional shutdown.)
linkUp – LMI is up or Frame
Relay link is enabled.
Relay link is enabled.
String:
‘$ifString up.’
‘$ifString up.’
T1 Network,
BRI,
PRI,
Synchronous Data
Port
BRI,
PRI,
Synchronous Data
Port
DTE Side of the Frame
Relay UNI
Relay UNI
(Supported by the
media-specific Frame
Relay DTE’s MIB.)
media-specific Frame
Relay DTE’s MIB.)
ifIndex (RFC 1573)
ifAdminStatus (RFC
1573)
1573)
ifOperStatus (RFC 1573)
devLastTrapString
(devHealthAndStatus.-
(devHealthAndStatus.-
mib)
linkDown – LMI is down for the
LMI Protocol configured,
LMI Protocol configured,
3
or
Frame Relay link is disabled.
Strings:
‘$ifString LMI down.’
‘$ifString LMI down.’
‘$ifString administratively
shutdown.’ (Due to an
intentional shutdown.)
shutdown.’ (Due to an
intentional shutdown.)
linkUp – LMI is up or Frame
Relay link is enabled.
Relay link is enabled.
String:
‘$ifString up.’
‘$ifString up.’
Table B-6.
linkUp and linkDown Variable-Bindings (2 of 2)
Interface
Variable-Bindings
Possible Cause
1
The DTR alarm condition will only generate a linkUp/ linkDown trap if the DTE
supports the DTR lead state.
supports the DTR lead state.
2
The RTS alarm condition will only generate a linkUp/ linkDown trap if the DTE
supports the RTS lead state.
supports the RTS lead state.
3
If the LMI Protocol is not configured, a linkUp/linkDown trap is based solely upon
whether the interface is enabled or disabled.