Regular Expressions 101

Group 1((?:[\da-fA-F]{2}[\s:.-]?){6})

Non-Capturing Group(?:[\da-fA-F]{2}[\s:.-]?){6}

{6}repeats the group contents below exactly 6 times:

Character Class[\da-fA-F]{2}

{2}matches exactly 2 characters from the set below:

\da Unicode decimal digit

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

Character Class[\s:.-]?

?matches at most one character from the set below:

\sa Unicode whitespace character

:the literal : (58₁₀ / 72₈ / 3A₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

((?:[\da-fA-F]{2}[\s:.-]?){6})

New

Entry  Mac                 Vlan INTF PORT MOD MPLS_LABEL ToCpu Drop RefCount
100002  00:00:00:00:00:00 4094    0     0    0        -1  yes   no    2
100004  00 00 1a 0a 84 95    1    1    13    0        -1   no   no    1
100005  a8:97:dc:8c:95:01    3    3     0t   0        -1   no   no    2

Regular Expression

Substitution