Character

Meaning

Remarks

 

Repeats the character string

 

 

specified by the index. A character

For example, (string)\1 repeats string, and a

 

string refers to the string within ()

 

before \. index refers to the

matching string must contain stringstring.

 

sequence number (starting from 1

(string1)(string2)\2 repeats string2, and a

\index

from left to right) of the character

matching string must contain string1string2string2.

 

group before \. If only one character

(string1)(string2)\1\2 repeats string1 and string2

 

group appears before \, index can

respectively, and a matching string must contain

 

only be 1; if n character groups

string1string2string1string2.

 

appear before index, index can be

 

 

any integer from 1 to n.

 

 

 

 

 

 

For example, [^16A] means to match a string

 

Matches a single character not

containing any character except 1, 6 or A, and the

[^]

matching string can also contain 1, 6 or A, but

contained within the brackets.

cannot contain these three characters only. For

 

 

 

example, [^16A] matches “abc” and “m16”, but

 

 

not 1, 16, or 16A.

 

 

 

\<string

Matches a character string starting

For example, “\<do” matches word “domain” and

with string.

string “doa”.

 

 

 

 

string\>

Matches a character string ending

For example, “do\>” matches word “undo” and

with string.

string “abcdo”.

 

 

 

 

 

Matches character1character2.

For example, “\ba” matches “-a” with “-“ being

 

character1 can be any character

\bcharacter2

character1, and “a” being character2, but it does

except number, letter or underline,

 

not match “2a” or “ba”.

 

and \b equals [^A-Za-z0-9_].

 

 

 

 

 

 

Matches a string containing

For example, “\Bt” matches “t” in “install”, but not

\Bcharacter

character, and no space is allowed

“t” in “big top”.

 

before character.

 

 

 

 

 

 

Matches character1character2.

For example, “v\w” matches “vlan”, with “v” being

 

character2 must be a number, letter,

character1\w

character1, and “l” being character2. v\w also

or underline, and \w equals

 

matches “service”, with “i” being character2.

 

[^A-Za-z0-9_].

 

 

 

 

 

 

 

For example, “\Wa” matches “-a”, with “-” being

\W

Equals \b.

character1, and “a” being character2, but does not

 

 

match “2a” or “ba”.

Escape character. If a special

\character listed in this table follows \, the specific meaning of the character is removed.

For example, “\\” matches a string containing “\”, “\^” matches a string containing “^”, and “\\b” matches a string containing “\b”.

Example of filtering output information

1.Example of using the begin keyword

#Display the configuration from the line containing “user-interface” to the last line in the current configuration (the output information depends on the current configuration).

<Sysname> display current-configuration begin user-interface user-interface aux 0

user-interface vty 0 15 authentication-mode none

12