From: Anthony Pace (anthonypace@fastmail.fm)
Date: Mon Jun 23 2003 - 18:44:27 GMT-3
^100_([0-9]*)*$ is invalid, but I also though the second astrix would
have allowed the whole element to repeat.
Tony
On Thu, 19 Jun 2003 21:32:13 -0400, "Pete Yeargin (pyeargin)"
<pyeargin@cisco.com> said:
> I would think that to specify an as-path list that takes into account
> your neighbor's neighbors practice of path-prepending, you could add
> parantheses around the whole thing as in:
>
> ^100_([0-9]*)*$
>
>
>
> Pete
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Anthony Pace
> Sent: Thursday, June 19, 2003 9:11 PM
> To: ccielab@groupstudy.com
> Subject: ^100_[0-9]*$ again
>
>
> The * means the element may contain any combination of numbers [0-9]. If
>
> your neighbor is AS100 then:
>
> ^100_[0-9]*$ will catch your neighbors neigbors routes
>
> ^100$ will catch you neighbros routes
>
> or to catch both you can use ^100 ?[0-9]*$
>
> I tried ^100_[[0-9]*]*$ but it did not work. I want to explicitly name
> the first element ^100 then say any other element may occur zero,one or
> many times (as long as it is the same element over and over again) this
> would be my neigbors neigbors with PREPENDS.
>
> Anthony Pace
> >
> >
> >
> >
> > On Thu, 19 Jun 2003 11:48:43 -0400, "Snow, Tim" <timothy.snow@eds.com>
> > said:
> > > I thought the * after the [] is a reoccurance of it?
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: Anthony Pace [mailto:anthonypace@fastmail.fm]
> > > Sent: Wednesday, June 18, 2003 8:57 PM
> > > To: 'John Matijevic'; Jung, Jin; 'Chris Home'; nsevasti@cisco.com;
> > > ccielab@groupstudy.com
> > > Subject: Re: Regular expression for my neighbors neighbors
> > >
> > >
> > > This regular expression for my neigbors routes and my neigbors
> > > directly connected neigbors ^100_[0-9]*$ has been discussed in a
> > > couple of places, but I was wondering if anyone knows of a way to
> > > allow that second element to be prepended. I notice that some of my
> > > neigbors neigbors have their AS prepened several times (maybe they
> > > are in a failover situation).
> > >
> > > Anyone know the real world version of this conecept?
> > >
> > > The expression would be ^Starting in AS100 with anything as the next
>
> > > element and that element may occur an infinite number of times in
> > > the string$
> > >
> > > Anthony Pace
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Wed, 18 Jun 2003 15:43:37 -0400, "John Matijevic"
> > > <matijevi@bellsouth.net> said:
> > > > Nark, I agree with Jin,
> > > > ip as-path access-list 1 permit ^100_[0-9]*$
> > > >
> > > > Here is the reference for the command.
> > > >
> > > >
> > > >
> > > http://www.cisco.com/en/US/tech/tk365/tk80/technologies_tech_note091
> > > 86a00800
> > > 94a92.shtml
> > > > Sincerely,
> > > > Matijevic
> > > >
> > > > ----- Original Message -----
> > > > From: "Jung, Jin" <jin.jung@lmco.com>
> > > > To: "'Chris Home'" <clarson52@comcast.net>; <nsevasti@cisco.com>;
> > > > <ccielab@groupstudy.com>
> > > > Sent: Wednesday, June 18, 2003 3:22 PM
> > > > Subject: RE: Regular expression
> > > >
> > > >
> > > > > Hi Chris,,
> > > > > Nice try but that will allow all the routes that are originated
> > > > > from
> > > 100.
> > > > >
> > > > > The question asks "AS 100 and directly connected only"..which is
>
> > > > > one hop from 100 only.
> > > > >
> > > > > So I think ^100_[0-9]*$ should work, --- I think.
> > > > >
> > > > > This will only allow originated AS and directly connected ASs
> > > > > only,
> > > > >
> > > > >
> > > > >
> > > > > Jin jung....
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: Chris Home [mailto:clarson52@comcast.net]
> > > > > Sent: Wednesday, June 18, 2003 2:36 PM
> > > > > To: nsevasti@cisco.com; ccielab@groupstudy.com
> > > > > Subject: Re: Regular expression
> > > > >
> > > > >
> > > > > Just a guess. I would be looking for the right answer too but...
> > > > >
> > > > > route-map something in
> > > > >
> > > > > neigh x.x.x.x route-map something in
> > > > >
> > > > > route-map something permit 10
> > > > > match add as-path 2
> > > > >
> > > > >
> > > > > ip as-path access-list 2 permit ^100_
> > > > >
> > > > > I would think this would allow anything in that originated from
> > > > > 100 and include anything it is dorectly connected too.
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: <nsevasti@cisco.com>
> > > > > To: <ccielab@groupstudy.com>
> > > > > Sent: Wednesday, June 18, 2003 8:57 AM
> > > > > Subject: Regular expression
> > > > >
> > > > >
> > > > > > Hi,
> > > > > > can anyone help with a regular expression that would permit
> > > > > > bgp to accept
> > > > > from a neighbor(EBGP) using an ip as-path access-list just the
> > > > > routes
> > > that
> > > > > originate in the neighbor's AS and it's DIRECTLY connected
> > > > > AS's?
> > > > > >
> > > > > > Like if the neighbor is in AS 100 and directly connected with
> > > > > > it are 2000
> > > > > and 30000, the expression would match
> > > > > >
> > > > > > 100
> > > > > > 100 2000
> > > > > > 100 30000
> > > > > >
> > > > > > and any other AS's DIRECTLY connected to 100
> > > > > >
> > > > > > Bye,
> > > > > > Nark
> > > > > >
> > > > > >
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> > > --
> > > Anthony Pace
> > > anthonypace@fastmail.fm
> > >
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