Re: [j-nsp] AS Path regular expression for Null AS

2010-06-21 Thread Judah Scott
Just a guess but try ^ $ to match beginning and end with nothing in
between.  Or you can match against ^ 1234{0,1} $ which matches the
null as or a single occurrence of only AS 1234 (just insert any unused
AS).

-J Scott

On Mon, Jun 21, 2010 at 3:10 PM, Leah Lynch leah.ly...@clearwire.com wrote:
 I cannot seem to get any of the regular expressions that I know of for null 
 AS to work. I have tried () and * and neither expression returns any 
 results. Does anyone out there have a known working expression for this on 
 M/MX routers?

 Leah


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Re: [j-nsp] AS Path regular expression for Null AS

2010-06-21 Thread Ricardo Tavares
Hi,

Everything in the junos doc works as expected and I have tried a lot
of combs, if you are using this procedure to select only local BGP
routes do not forget to reject everything else too, because the
default accept policy in the junos BGP, not sure if this is the
problem.

Below a Juniper example that worked fine for me:

[edit policy-options]
null-as ();
policy-statement only-my-routes {
term just-my-as {
from {
protocol bgp;
as-path null-as;
}
then accept;
}
term nothing-else {
then reject;
}
}
protocol {
bgp {
neighbor 10.2.2.6 {
export only-my-routes;
}
}
}


On Mon, Jun 21, 2010 at 7:39 PM, Judah Scott judah.scott@gmail.com wrote:
 Just a guess but try ^ $ to match beginning and end with nothing in
 between.  Or you can match against ^ 1234{0,1} $ which matches the
 null as or a single occurrence of only AS 1234 (just insert any unused
 AS).

 -J Scott

 On Mon, Jun 21, 2010 at 3:10 PM, Leah Lynch leah.ly...@clearwire.com wrote:
 I cannot seem to get any of the regular expressions that I know of for null 
 AS to work. I have tried () and * and neither expression returns any 
 results. Does anyone out there have a known working expression for this on 
 M/MX routers?

 Leah


 This email may contain confidential and privileged material for the sole use 
 of the intended recipient. Any review, use, distribution or disclosure by 
 others is strictly prohibited. If you are not the intended recipient (or 
 authorized to receive for the recipient), please contact the sender by reply 
 email and delete all copies of this message.

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