Re: BGP community Q

From: Anthony Pace (anthonypace@xxxxxxxxxxx)
Date: Sat Jul 06 2002 - 19:36:50 GMT-3


   
Would ^200_ work?

On Thu, 04 Jul 2002 07:09:53 -0300, "Carlos G Mendioroz"
<tron@huapi.ba.ar> said:
> Omer,
> _ should also match ^, so this is not it, or if it is, it's a bug :-)
>
> [See the same page you referred to, _1300_ does account for
> ^1300(space).]
>
> Also, be careful with ^200.*, you would match "2001 100 5 " which is
> not
> what is asked for, and you would loose points, or permit transit,
> depending on
> the task at hand :-)
>
> Regards,
>
>
> Omer Ansari wrote:
> >
> > Annu,
> >
> > you are using _200_ to match a route coming directly from 200.
> > i see AS200 is adjacent.
> >
> > try ^200.*
> >
> > see bgp example at the end of the link:
> > http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fte
rsv_c/ftsappx/tcfaapre.htm
> >
> > let us know if this helps?
> >
> > On Tue, 2 Jul 2002, Annu Roopa wrote:
> >
> > > Group,
> > >
> > > I have a community related question and the scenario
> > > is as follows.What am i doing wrong ? Scenario is:
> > >
> > >
> > > (AS100)
> > > r11---------r8---------r10(AS 200)
> > > iBGP eBGP
> > >
> > > There are some Networks (196.196.10.0/175.10.10.0
> > > etc)coming via R10 to R8.I want to add a community
> > > string of 100:88 to all routes containing AS 200 and
> > > send it to R11 from R8.But somehow its not adding it
> > > rather adding 100:900 when i see it on R11. Whats
> > > wrong with my logic ?
> > >
> > > Here are my configs and show commands.
> > >
> > > R8#sr
> > > Building configuration...
> > > Current configuration:
> > > hostname r8
> > > !
> > > router bgp 100
> > > bgp router-id 8.1.1.1
> > > network 8.1.1.0 mask 255.255.255.0
> > > neighbor 11.1.1.1 remote-as 100
> > > neighbor 11.1.1.1 update-source Loopback0
> > > neighbor 11.1.1.1 next-hop-self
> > > neighbor 11.1.1.1 send-community
> > > neighbor 11.1.1.1 route-map address out
> > > neighbor 180.10.10.1 remote-as 200
> > > neighbor 180.10.10.1 ebgp-multihop 255
> > > neighbor 180.10.10.1 update-source Loopback0
> > > !
> > > ip bgp-community new-format
> > > ip as-path access-list 11 permit _200_
> > > ip as-path access-list 11 deny .*
> > > !
> > > route-map address permit 10
> > > match as-path 11
> > > set community 100:88
> > > !
> > > route-map address permit 20
> > > set community 100:900
> > >
> > > ------------------
> > > r8#sh ip bgp regexp _200_
> > > BGP table version is 12, local router ID is 8.1.1.1
> > > Status codes: s suppressed, d damped, h history, *
> > > valid, > best, i - internal
> > > Origin codes: i - IGP, e - EGP, ? - incomplete
> > >
> > > Network Next Hop Metric LocPrf
> > > Weight Path
> > > *> 10.1.1.0/24 180.10.10.1 0 200 300 i
> > > *>175.10.10.0/24 180.10.10.1 0 200 300 i
> > > *> 180.10.10.0/24 180.10.10.1 0 0 200 i
> > > *> 190.10.10.0/24 180.10.10.1 0 200 300 400
> > > i*> 192.168.1.0 180.10.10.1 0 200 300 i
> > > *> 196.196.1.0 180.10.10.1 0 200 300 i
> > > -------------------------------
> > > R11#b 196.196.1.0
> > > BGP routing table entry for 196.196.1.0/24, version 40
> > > Paths: (1 available, best #1, table
> > > Default-IP-Routing-Table)
> > > Advertised to non peer-group peers:
> > > 1.1.1.2
> > > 200 300
> > > 8.1.1.1 (metric 129) from 8.1.1.1 (8.1.1.1)
> > > Origin IGP, localpref 100, valid, internal, best
> > > Community:100:900
> > >
> > > R11#b 175.10.10.0
> > > BGP routing table entry for 175.10.10.0/24, version 38
> > > Paths: (1 available, best #1, table
> > > Default-IP-Routing-Table)
> > > Advertised to non peer-group peers:
> > > 1.1.1.2
> > > 200 300
> > > 8.1.1.1 (metric 129) from 8.1.1.1 (8.1.1.1)
> > > Origin IGP, localpref 100, valid, internal, best
> > > Community: 100:900
> > > ---------------------------
> > >
> > > Failed to troubleshoot it.Anyone with ideas.
> > >
> > >
> > >
> > >
> > >
> > > =====
> > > Thanks in advance for ur time and replies.
> > > Annu.
> > >



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