Differnce between net class and net group.

Question

Hi all, 
 Good day!... 
 I am little confisued between net class and net group in constraint manager. 
 Please clarify where to use net class and net group for me. 
 which one do I need follow up to?

aniju · Answer

Assume, You have created Net class in Electrical constriant, you have to set the constriants with in the electrical constriants set. 
 Assume, you have created Netgroup in electrical constriant, This can be used with Electical, Physical, Spacing, Same net spacing constriants sets. 
 here are the screenshots. I have created Net-class as 'TEST' and 'NG2' as a Net-group, TEST stays in with electrical constraints set only but NG2 will have it physical, spacing and other constraints set as well. 
 
 now i moved to physical constriants set, we can set physical constraints for NG2 net group, here is the image. 
 
 Net group can be member of net class but net class cannot be a member of netgroup because net class is local and netgroup is global . Net classes is applicable when you have a specific requirements to the nets. 
 
 Please refer below article for more differences. 
 Article (20460969) Title: What is the difference between a Net Group and a Net Class in Constraint Manager? URL: support.cadence.com/.../ArticleAttachmentPortal

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Differnce between net class and net group.

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