Question : What are the advantages to having a seperate subnet for every VLAN?

From what I understand it is common practice to have a separate range of IP for every VLAN. What are the advantages of doing this? What functionality does subnetting add too a VLAN?

Answer : What are the advantages to having a seperate subnet for every VLAN?

Try this.

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Sub x()
 
Dim rng As Range, ws As Worksheet

Application.DisplayAlerts = False

With Sheet1
    Sheets.Add().Name = "temp"
    .Range("A1", .Range("A" & Rows.Count).End(xlUp)).AdvancedFilter Action:=xlFilterCopy, CopyToRange:=Sheets("temp").Range("A1"), Unique:=True
     For Each rng In Sheets("temp").Range("A2", Sheets("temp").Range("A2").End(xlDown))
        If UCase(Right(rng, 5)) <> "TOTAL" Then
            Set ws = Sheets.Add(After:=Sheets(Sheets.Count))
            ws.Name = rng
            .AutoFilterMode = False
            .Range("A1").AutoFilter field:=1, Criteria1:=rng & "*"
            .AutoFilter.Range.Copy Sheets(rng.Text).Range("A1")
            Sheets(rng.Text).Move
            ActiveWorkbook.Close SaveChanges:=True, Filename:="C:\Users\Stephen\Desktop\" & rng & ".xls"
        End If
    Next rng
    .AutoFilterMode = False
    Sheets("temp").Delete
End With
     
Application.DisplayAlerts = True

End Sub