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- The hasnetwork operator returns a value of true if at least one device interface is part of the specified network views list:
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Syntax example: hasnetwork\["blue","red","green"\] |
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Device Group/Interface Group Membership and Issue Suppression
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With the special symbols above, the following characters are treated as modifiers that can be used to match against a previous sub-pattern zero, one, or more times:
{N} Match the sub-pattern exactly N times
{N,} Match the sub-pattern N or more times
{N,M} Match at least N times and no more than M times
? Match the sub-pattern 0 or 1 times; same as {0,1}
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Match the sub-pattern 0 or more times; same as \{0,\}
+ Match the sub-pattern 1 or more times; same as \{1,\}
Modifiers can be used to reduce the size of the expression and to specify optional parts of the expression. They are useful when combined with parentheses to designate sub-patterns.
The pattern
/Se(rial)?\d+/\d+/
matches any serial interface designator, either in the short form (Se0/0) or the long form (Serial12/45). Examples:
$Vendor like /Cis(co)?/ $ ifType like /Se(rial)?\d+\[/\]\d+/
You use regular expressions to match values selected from a larger database of values. For economy of effort, it is sometimes easier to specify "just enough" of a pattern to obtain the match. For example, though a valid IPv4 address is formatted as "A.B.C.D" where A, B, C and D range from 0 to 255, an expression
/^(\d\{1-3\}\.)\{3\}254$/
ensures that the first three octets are in fact defined as numbers with dots in between, but is unnecessary to find all addresses ending with ".254" when a simpler expression
/\.254$/
which checks for the desired suffix will succeed.
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