Spectrum Topology and MIBs

[Bruno Sousa]

​Hello,

Does anyone knows which MIBs does spectrum uses for layer topology discovery?

Thank you.

Best regards
Bruno Sousa

[Glenn Shoemake]

Hi Bruno,

Here is a well written techdoc that explains how a lot of Spectrum topology is discovered.

https://ca-broadcom.wolkenservicedesk.com/external/article?articleId=118641&_ga=2.75650709.1057737727.1581928033-1159930342.1572865330


Best regards,
Glenn

[Bruno Sousa]

Hello Glenn,

Thank you!

Great!

If I'm correct though, the document is related to the Layer 2 discovery.

Do you have a similar document for Layer 3 discovery?

Thank you.

Best regards
Bruno Sousa

[Glenn Shoemake]

Hi Bruno,

The very first part does mention layer 3, although its not specific.

Mapping devices that connect network layers below layer 3 can be a difficult task because there may not be an abundance of complete and accurate information available in device MIBs. Many devices store connectivity information in a proprietary format while others store no information at all. In these situations, connections need to be implied from other devices or determined heuristically through complex analysis. 

It appears that there is no mib information but its done through analysis in Spectrum.

If your really interested in displaying Layer 3 information you should look at Ip Routing Manager.

https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/spectrum/10-4-1/managing-network/ip-routing-manager/introducing-ip-routing-manager.html

There is a hardware cost for this as a special device is needed to gather this information from Spectrum.

Best regards,
Glenn