B. SNMP MIBs, Traps, and RMON Alarm Defaults

Table B-6. linkUp and linkDown Variable-Bindings (2 of 3)

Interface

Variable-Bindings

Possible Cause

Physical Sublayer (continued)

Synchronous

ifIndex (RFC 1573)

 

linkDown – One or more alarm

Data Port

ifAdminStatus (RFC 1573)

 

conditions are active on the

 

 

port. Alarm conditions include:

 

 

 

(Supported by the

ifOperStatus (RFC 1573)

 

– DTR off. The DTR alarm

 

 

condition will only generate

media-specific

￿devLastTrapString

 

RS232-like MIB.)

(devHealthAndStatus.mib)

￿

a linkUp/linkDown trap if the

 

 

 

DTE supports the DTR lead

 

 

 

state.

 

 

 

– RTS off. The RTS alarm

 

 

 

condition will only generate

 

 

 

a linkUp/linkDown trap if the

 

 

 

DTE supports the RTS lead

 

 

 

state.

 

 

 

– Not DTR or RTS, but link is

 

 

 

down.

 

 

 

Strings:

 

 

 

‘$ifString $alarmString down.’

 

 

 

(e.g., `Sync Data Port S01P1

 

 

 

DTR and RTS down.’)

 

 

 

‘$ifString administratively shut

 

 

 

down.’ (Due to an intentional

 

 

 

shutdown.)

 

 

 

linkUp – No alarms on the port.

 

 

 

String:

 

 

 

‘$ifString up.’

 

 

 

 

Ethernet Port

ifIndex (RFC 1573)

 

linkDown – Communication is

(Supported by an

ifAdminStatus (RFC 1573)

 

not possible over the Ethernet

 

port.

entry in the MIB-II

 

 

ifOperStatus (RFC 1573)

 

– Loss of Signal (LOS)

Interfaces Table.)

 

 

 

 

 

￿devLastTrapString

 

– Loss of Frame (LOF)

 

(devHealthAndStatus.mib)

￿

– Loss of Link (LOL)

 

 

￿

– Loss of Signal Quality

 

 

 

– LPR Events

 

 

 

Strings:

 

 

 

‘$ifString down.’

 

 

 

‘$ifString administratively shut

 

 

 

down.’ (Due to an intentional

 

 

 

shutdown.)

 

 

￿

linkUp – Communication on the

 

 

Ethernet port is restored.

 

 

String:

 

 

‘$ifString up.’

 

 

 

 

 

 

9700-A2-GB20-20

December 2002

B-9

Page 249
Image 249
Paradyne 9720, 9788 manual ‘$ifString $alarmString down.’

9720, 9788 specifications

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