Resolved issue with NetworkConfig parsing device configs with inconsistent indentation levels. (#51850)

lib/ansible/module_utils/network/common/config.py

@@ -214,8 +214,7 @@ class NetworkConfig(object):
         ancestors = list()
         config = list()
 
-        curlevel = 0
+        indents = [0]
-        prevlevel = 0
 
         for linenum, line in enumerate(to_native(lines, errors='surrogate_or_strict').split('\n')):
             text = entry_reg.sub('', line).strip()
@@ -228,20 +227,21 @@ class NetworkConfig(object):
             # handle top level commands
             if toplevel.match(line):
                 ancestors = [cfg]
-                prevlevel = curlevel
+                indents = [0]
-                curlevel = 0
 
             # handle sub level commands
             else:
                 match = childline.match(line)
                 line_indent = match.start(1)
 
-                prevlevel = curlevel
+                if line_indent < indents[-1]:
-                curlevel = int(line_indent / self._indent)
+                    while indents[-1] > line_indent:
+                        indents.pop()
 
-                if (curlevel - 1) > prevlevel:
+                if line_indent > indents[-1]:
-                    curlevel = prevlevel + 1
+                    indents.append(line_indent)
 
+                curlevel = len(indents) - 1
                 parent_level = curlevel - 1
 
                 cfg._parents = ancestors[:curlevel]