[c-nsp] Expression to match 1, 2, or 3 AS paths

[Diogo Montagner]

Hi Darryl,

many thanks. This was exactly my doubt.

Some days ago I was trying to identify prepends using regular
expressions without knowing the AS.

Regards,
./diogo -montagner


On Fri, Jun 13, 2008 at 11:47 PM, Darryl Dunkin <ddunkin at netos.net> wrote:
> You would have to specify the AS, as using wildcard digits won't
> identify repetition.
>
> If you had 500 500 500 400, or 500 500 400 400, where 500 was connected
> to you: ^500(_500)*(_400)*$
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Diogo Montagner
> Sent: Friday, June 13, 2008 18:54
> To: deepak at ai.net
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Expression to match 1, 2, or 3 AS paths
>
> Great!
>
> And how I could match prepends, ie, how I could identify AS paths
> which has prepends ?
>
> Regards,
> ./diogo -montagner
>
>
> On Fri, Jun 13, 2008 at 7:21 PM, Deepak Jain <deepak at ai.net> wrote:
>>
>> And since you can't have non-numeric AS numbers... you can always use
> "."
>>
>> like ^.+$
>>
>> DJ
>>
>> Daniel Faubel wrote:
>>>
>>> I like to use this:
>>>
>>> ^[0-9]+$
>>> ^[0-9]+_[0-9]+$
>>> ^[0-9]+_[0-9]+_[0-9]+$
>>>
>>> -Daniel
>>>
>>> -----Original Message-----
>>> From: cisco-nsp-bounces at puck.nether.net
>>> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of james edwards
>>> Sent: Friday, June 13, 2008 1:41 PM
>>> To: cisco-nsp at puck.nether.net
>>> Subject: [c-nsp] Expression to match 1, 2, or 3 AS paths
>>>
>>> What have i done wrong here, I used to use this to match 1,2 and 3 AS
>>> path,
>>> for filtering down a full table:
>>>
>>> ^[0-9]*$
>>> ^[0-9]*_[0-9]*$
>>> ^[0-9]*_[0-9]*_[0-9]*$
>>>
>>>
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