Netgear M5300-28G-POE+ (GSM7228PSv1h2) - 12-Port Managed Gigabit Switch Ratgeber Für Administratoren

If you want to filter routes from a specific neighbor, use the following command:

(Netgear Switch) (Config-router)#neighbor 36.1.1.2 prefix-list prefix1 in

If you want to filter routes that will be sent out to a neighbor, use the option <out>:

(Netgear Switch) (Config-router)#distribute-list prefix-list prefix1 out

Or 

(Netgear Switch) (Config-router)#neighbor 36.1.1.2 prefix-list prefix1 out

Although filtering by prefix list is easy and fast, it is not practical to filter routes in the case of 

a large number of routes. In this case, BGP provides the AS_PATH filter to control routes 
based on AS_PATH instead of each specific address in a prefix list. It allows users to create 
an AS-PATH list using regular expressions. Regular expressions use special characters to 
find matches in the given texts.

The following special characters are supported in AS_PATH regular expressions.

asterisk

*

Matches zero or more sequences of 
the pattern.

1* matches any occurrence of the number 1 
including none

12* matches the characters 12 and any 
characters that follow 12.

brackets

[ ]

Designates a range of 
single-character patterns.

[0123a-z] matches 0, 1, and w, but not 4, 8, or 
K

caret

^

Matches the beginning of the input 
string.

^123 matches 1234, but not 01234

dollar sign

$

Matches the end of the input string.

123$ matches 0123, but not 1234

hyphen

-

Separates the end points of a 
range.

[a-z] matches any character between a and z.

period

.

Matches any single character, 
including white space.

0.0 matches 0x0 and 020

t..t matches strings such as test, text, and tart

plus sign

+

Matches 1 or more sequences of 
the pattern.

2+ requires there to be at least one number 2 in 
the string to be matched