Regular Expressions As Filters - Dell C9000 Series Networking Configuration Manual

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Dell#show ip bgp paths
Total 30655 Paths
Address
Hash Refcount Metric Path
0x4014154 0
3
0x4013914 0
3
0x5166d6c 0
3
0x5e62df4 0
2
0x3a1814c 0
26
0x567ea9c 0
75
0x6cc1294 0
2
0x6cc18d4 0
1
0x5982e44 0
162
0x67d4a14 0
2
0x559972c 0
31
0x59cd3b4 0
2
0x7128114 0
10
0x536a914 0
3
0x2ffe884 0
1
0x2ff7284 0
99
0x2ff7ec4 0
4
0x2ff8544 0
3
0x736c144 0
1
0x3b8d224 0
10
0x5eb1e44 0
1
0x5cd891c 0
9
--More--

Regular Expressions as Filters

Regular expressions are used to filter AS paths or community lists. A regular expression is a special character
used to define a pattern that is then compared with an input string.
For an AS-path access list, as shown in the previous commands, if the AS path matches the regular expression
in the access list, the route matches the access list.
The following lists the regular expressions accepted in the Dell Networking OS.
Regular
Definition
Expression
^ (caret)
Matches the beginning of the input string. Alternatively, when used as the first character
within brackets [^ ], this matches any number except the ones specified within the
brackets.
$ (dollar)
Matches the end of the input string.
. (period)
Matches any single character, including white space.
* (asterisk)
Matches 0 or more sequences of the immediately previous character or pattern.
+ (plus)
Matches 1 or more sequences of the immediately previous character or pattern.
? (question)
Matches 0 or 1 sequence of the immediately previous character or pattern.
( ) (parenthesis)
Specifies patterns for multiple use when one of the multiplier metacharacters follows:
asterisk *, plus sign +, or question mark ?
[ ] (brackets)
Matches any enclosed character and specifies a range of single characters.
18508 701 3549 19421 i
18508 701 7018 14990 i
18508 209 4637 1221 9249 9249 i
18508 701 17302 i
18508 209 22291 i
18508 209 3356 2529 i
18508 209 1239 19265 i
18508 701 2914 4713 17935 i
18508 209 i
18508 701 19878 ?
18508 209 18756 i
18508 209 7018 15227 i
18508 209 3356 13845 i
18508 209 701 6347 7781 i
18508 701 3561 9116 21350 i
18508 701 1239 577 855 ?
18508 209 3561 4755 17426 i
18508 701 5743 2648 i
18508 701 209 568 721 1494 i
18508 209 701 2019 i
18508 701 8584 16158 i
18508 209 6453 4759 i
Border Gateway Protocol IPv4 (BGPv4)
225

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