Fanout behavior

[Legacy User]

Hello nice people! I will like to understend the behavior when i create and connect the fanouts models eachothers or with another devices, the Infra Connector critical alarms show up and its do not clean automaticly and i solve it chaging the valur of the condition attribute to normal.

here a video: https://www.youtube.com/watch?v=ZKMBLQ2FhoA

Thanks

Diego

[Jason Meader]

Hi Diego,

The reason you are running into the issue is that you are connecting a fanout to a fanout model.  That is not a supported configuration.   You should use just one fanout in that conifiguation instead of 3.  Then I would expect you will get the desired results.

Cheers!

Jay

[Legacy User]

Thanks Jay !

[Anon Anon]

Hi Jason,

I am having same issue as described Diego. I understand that having two or more fanouts connected together is not to supported, but I would like to know what is the proper way to model two unmanaged devices in spectrum that are physically connected together - lets say two VDSL modems. Is there any solution to this?

[Jason Meader]

Hi Atavias,

                Do they respond to ping?  Assuming they do, I would model those as pingables…

Cheers

Jay

[Anon Anon]

Hi Jason,

no they are not responding to ping. These type of devices are completely passive like optical converters, VDSL modems or even some wireless radio devices. We definitely want to be shown in topology, because it helps our technicians to see complete topology if they are diagnosing a problem on the network. My colleague figured out that specturm allows to connect multiple fanouts without generating alarms using proxy model, but I think this workaround is wrong  and there must be other way to deal with this type situation. Any advice appreciated.

[ackjo04]

Another option is to use the SharedMediaLink model instead of the Fanout model. One of the biggest issues with connecting two or more Fanout models together is the risk of Spectrum getting into a loop during the Fault Isolation process. The SharedMediaLink model looks like the Fanout model but participaets in the Fault Isolation process differently. Reference the "Modeling and Managing Your IT Infrastructure Administrator Guide" for more details.

 

Joe

[Anon Anon]

Hi Joe,

thank you for suggestion. I tried SharedMediaLink today and so far it behaves exactly like we need.

 

Thanks again

[ackjo04]

OUTSTANDING! Please be sure to mark it as the correct answer.

 

Joe

[Anon Anon]

I definitely would like to do that, but I don't have such option since I did not started this discussion...