Regex as-path match question

[shamax_1983]

I have been testing some as-path match scenarios using BGP filtering and I found that on IOS XE, following two Regex matches giving the same results.

What I want is to match is, any prefix if it originated from 12031 ( I don't care what path it took to get to me)

ip as-path access-list 100 permit .*12031$

ip as-path access-list 200 permit 12031$

So what I gather from the results is that if you didn't have ".*" at the beginning, it looks like the router assumes that I had "match anything" regardless.

Am I getting this right?

Thanks

[balaji.bandi]

.	Matches any single character.
*	Matches 0 or more sequences of the pattern
^	Matches the beginning of an input string
$	Matches the end of an input string

In your example  -   ,* Anything  

here is some examples :

http://resources.intenseschool.com/bgp-regular-expressions/