Those are symbols for use with Regular expressions.
^ = Matches the beginning of the input string
$ = Matches the end of the input string
What your example is doing is permitting advertisement(s) for any BGP
learned networks whose path either begins or ends with 100. In other words,
accept advertisements that were originated from AS 100.
Mas
mak <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Hi,
>
> For example, ip as-path access-list 20 permit ^100$
>
> What is the ^$ stands for?
>
> Thanks
>
> mak
>
>
>
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