Interface Polling in Spectrum

[Legacy User]

Hi All,

 

Can you please help me clear this dilemma.

 

Interface monitoring in Spectrum is done through two ways i.e. either through Polling or Link Down Traps. To get Interface down alerts through Polling we need to enable certain attributes in Spectrum , i.e. "Poll port Status" and "Generate Poll Status Alarms"  and an alarm is raised "BAD LINK DETECTED"

 

But to my surprise there are certain fabric switches in my environment on which these attributes are not enabled for the interfaces but still "BAD LINK DETECTED" alarms are getting generated for some interfaces.

 

Can someone please help what might be causing to generate these alerts.

[Frank Tonjes]

Can you provide a list of the attributes that you are talking about here? There are different ones that change the behaviour in differrent ways:

 

Generate Port Status Alarms (0x12a54): Generate port status alarms for this interface.

Assert Link Down Alarms (0x12957): Assert Link Down Alarms for this interface.

OK to Poll (0x11dd8): Is it ok to poll for state info?

Poll Port Status (0x1280a): Poll the port for status information.

Alarm on Link Down Trap (0x11fc2): Generate minor alarm when a link down trap is received on this interface.

 

These are the 5 attributes we set based on if we want traps enabled or not!

Regards,

 

 

Frank

[ackjo04]

Out of the box, the BAD LINK DETECTED alarm is asserted in one of four ways in Spectrum:

 

PollPortStatus

Live Links (Pipes)

Link Down trap

Port Fault Correlation

[Legacy User]

Hi Joe,

 

It states if any of the four attributes is enabled , "BAD Link Detected" Alarm would be generated.

 

Poll Port Status = No

Alarm on Link Down trap = Check Status (1)

 

These are the values for one of the specific interfaces. But still alerts are getting generated?

[ackjo04]

If AssertLinkDownAlarm attribute id 0x12957 is set to Check Status (1), then when a link down trap is received for that interface, Spectrum checks the value of ifOperStatus and ifAdminStatus. If ifOperStatus is down and ifAdminStatus is up than Spectrum will assert the Bad Link Detected alarm on the interface model.

[Legacy User]

Hi Joe,

 

I got your point. In what scenarios does "Communication Link Down" Alarm works then.

Do we need to enable specific attributes from Spectrum end ?

[ackjo04]

If you do not wish to have the BAD LINK DETECTED alarm asserted on an interface model, set the GeneratePortStatusAlarms attribute id 0x12a54 to No on the interface model. With the GeneratePortStatusAlarms attribute id 0x12a54 set to No on the interface model, Spectrum will NOT assert the BAD LINK DETECTED alarm on the interface model no matter what the other attribute values are set to.