菜鸟对网络线长的疑惑

allegro自学中，对网络线长有一个疑惑：

Net Name: ADSP_PCI_CLK
Member of XNet: ADSP_PCI_CLK
Via Count: 2
Total Etch Length: 4857.224 MIL
Total Manhattan Length: 4898 MIL
Percent Manhattan: 99.17%

BUS_NAME = PCI_CLK
TOTAL_ETCH_LENGTH = 4940 MIL:4950 MIL
Electrical Constraints assigned to net
total etch length: min=4940 MIL max=4950 MIL
Constraint information:
(totE) (Xnet=ADSP_PCI_CLK) min= 4940 MIL max= 4950 MIL actual= 4947.043 MIL
54.456 MIL cline TOP
22.277 MIL cline TOP
4780.491 MIL cline S1
89.82 MIL cline TOP
Member of Groups:
XNET : ADSP_PCI_CLK

疑惑就是：ADSP_PCI_CLK这个网络线长是指Total Etch Length还是Constraint information里的actual= 4947.043 MIL
因为是自学，木有高手指点，所以发帖求解惑。



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