From: Tony Paterra (apaterra@gmail.com)
Date: Fri Sep 29 2006 - 10:02:11 ART
Thanks guy!
On 9/29/06, Narbik Kocharians <narbikk@gmail.com> wrote:
>
>
> Tony, this command is configured directly under the "router bgp xxx"
> process, therefore, it effects the router globally. I don't think there is a
> way to apply the command to a given neighbor.
>
>
>
> On 9/28/06, Brian Dennis <bdennis@internetworkexpert.com> wrote:
> > They will not appear in your BGP table. This means they will not be
> > sent to a neighbor or be sent to the routing table.
> >
> > Router#sho run | include (bgp|max|neighbor)
> > router bgp 100
> > bgp log-neighbor-changes
> > bgp maxas-limit 1
> > neighbor 54.1.1.254 remote-as 54
> > Router#
> > Router#sho ip bgp
> > BGP table version is 9, local router ID is 54.1.1.6
> > Status codes: s suppressed, d damped, h history, * valid, > best, i -
> > internal,
> > r RIB-failure, S Stale
> > Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> > *> 28.119.16.0/24 54.1.1.254 0 54 i
> > *> 28.119.17.0/24 54.1.1.254 0 54 i
> > *> 114.0.0.0 54.1.1.254 0 0 54 i
> > *> 115.0.0.0 54.1.1.254 0 0 54 i
> > *> 116.0.0.0 54.1.1.254 0 0 54 i
> > *> 117.0.0.0 54.1.1.254 0 0 54 i
> > *> 118.0.0.0 54.1.1.254 0 0 54 i
> > *> 119.0.0.0 54.1.1.254 0 0 54 i
> > Router#
> > Router(config)#router bgp 100
> > Router(config-router)#no bgp maxas-limit 1
> > Router(config-router)#^Z
> > Router#clear ip bgp *
> > Router#
> > *Sep 29 03:25:41.843: %BGP-5-ADJCHANGE: neighbor 54.1.1.254 Down User
> > reset
> > *Sep 29 03:25:43.375: %BGP-5-ADJCHANGE: neighbor 54.1.1.254 Up
> > Router#
> > Router#sho ip bgp
> > BGP table version is 11, local router ID is 54.1.1.6
> > Status codes: s suppressed, d damped, h history, * valid, > best, i -
> > internal,
> > r RIB-failure, S Stale
> > Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> > *> 28.119.16.0/24 54.1.1.254 0 54 i
> > *> 28.119.17.0/24 54.1.1.254 0 54 i
> > *> 112.0.0.0 54.1.1.254 0 0 54 50 60 i
> > *> 113.0.0.0 54.1.1.254 0 0 54 50 60 i
> > *> 114.0.0.0 54.1.1.254 0 0 54 i
> > *> 115.0.0.0 54.1.1.254 0 0 54 i
> > *> 116.0.0.0 54.1.1.254 0 0 54 i
> > *> 117.0.0.0 54.1.1.254 0 0 54 i
> > *> 118.0.0.0 54.1.1.254 0 0 54 i
> > *> 119.0.0.0 54.1.1.254 0 0 54 i
> > Router#
> >
> > HTH,
> >
> > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> > bdennis@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987
> > Direct: 775-745-6404 (Outside the US and Canada)
> >
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > Tony Paterra
> > Sent: Thursday, September 28, 2006 8:46 PM
> > To: Narbik Kocharians
> > Cc: Cisco certification
> > Subject: Re: Limiting the number of AS's in an AS Path...
> >
> > Actually, will this command do anything more than prevent the routes
> > from entering the routing table?
> >
> > For instance... Will I stop them from entering my BGP table and/or
> > being passed along to peers?
> >
> > Also can this functionality be implemented on a per-peer basis or only
> > globally across all BGP peers? Seems like globally, but you know what
> > happens when you "assume" something.
> >
> > Thanks,
> > Tony
> >
> > On 9/28/06, Narbik Kocharians <narbikk@gmail.com> wrote:
> > >
> > >
> > > (config-router)#bgp maxas-limit 20
> > >
> > > This command discards routes that have a number of AS-Path segments
> > that
> > > exceed the specified value. The range is 1 2000. The default value
> > in BGP
> > > is 75. This command was introduced in IOS release 12.2.
> > >
> > >
> > > On 9/28/06, Tony Paterra <apaterra@gmail.com> wrote:
> > > >
> > > > All,
> > > > If I wanted to filter out routes coming into a BGP peer to only
> > routes
> > > > that had an AS Path of less than 10 in length, how would you
> > recommend
> > > > doing it?
> > > >
> > > > I am looking at creating some pretty elaborate regexp's like....
> > > >
> > > > ([0-9]*)?_([0-9]*)? (all the way out to 10 places)
> > > >
> > > > But I'm thinking that there must be a feature or a more elegant way
> > of
> > > > accomplishing this. Any thoughts?
> > > >
> > > >
> > > > As always, thanks in advance....
> > > >
> > > > --
> > > > Tony Paterra
> > > > apaterra@gmail.com
> > > >
> > > >
> > >
> >
> _______________________________________________________________________
> > > > Subscription information may be found at:
> > > > http://www.groupstudy.com/list/CCIELab.html
> > > >
> > >
> > >
> > >
> > > --
> > > Narbik Kocharians
> > > CCIE# 12410 (R&S, SP, Security)
> > > CCSI# 30832
> > > Network Learning, Inc. (CCIE class Instructor)
> > > www.ccbootcamp.com (CCIE Training)
> >
> >
> > --
> > Tony Paterra
> > apaterra@gmail.com
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
>
> --
> Narbik Kocharians
> CCIE# 12410 (R&S, SP, Security)
> CCSI# 30832
> Network Learning, Inc. (CCIE class Instructor)
> www.ccbootcamp.com (CCIE Training)
-- Tony Paterra apaterra@gmail.com
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