Re: BGP

Marish,

I think you should reconsider the statement "we only update source when we r
using loop back address but I'm using physical address." Is that really the
only case? :-) You should try some debugging to compare the addresses being
used for BGP packets to the IP addresses you have configured for BGP
neighbors. Debugging ip bgp or debugging ip packet with an ACL matching port
179 may help.

Bryan Bartik
CCIE #23707, CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com

On Wed, May 6, 2009 at 9:32 AM, marish shah <contactmarish_at_gmail.com> wrote:

> Hi
> I think Ravi we only update source when we r using loop back address
> but I'm using physical address so in this case no need for update source
> command. And as I mention above static route through R1 - R6 - SW1 is
> working fine . But when remove static from there and create from R1 - R3 -
> SW1 its not working . So when I look close to my configuration I found
> that
> there is some routing configuration mistake in eigrp So I correct it but
> still same result I also do Clear but no benefit .Ok let me try to explain
> my topology I'm using IEW lab I verion 5
>
> R6..Fas0/0.146>155.1.146.6 is connected with R1..Fas0/0>155.1.146.1.Then
> R1..Ser1/0>155.1.13.1 is connected with R3..Ser1/3>155.1.13.3.Then
> R3..E0/0>155.1.37.3 is connected with SW1..Fas1/3>155.1.37.7.And
> SW1..Vlan67>155.1.67.7 is connected with R6...E0/1>155.1.67.6.
> R6----R1----R3---SW1
> | |
> |_____________ |
>
> So I experience today It is shows that you should do BGP relationship
> through that path from which you r getting routes via IGP.
>
> Any seggeations ......Please.
>
>
> Thanks.
>
>
> On Wed, May 6, 2009 at 5:17 PM, Ravi Singh <way2ccie_at_googlemail.com>
> wrote:
>
> > HI Marish,
> >
> > Have you configured the update-source command in your BGP config. My
> > guess is that when you are configuring the static towards SW1 , the
> > source address of the BGP packet will be of the interface that you
> > have configured as the peering address of R1. While when R1 is
> > dynamically learning the information through EIGRP the source address
> > is different than what the BGP process is expecting it to. Also, what
> > addresses are you using for the peering. Physical addresses or
> > loopbacks ??
> >
> > Ravi
> >
> > On Wed, May 6, 2009 at 2:56 PM, marish shah <contactmarish_at_gmail.com>
> > wrote:
> > > Hi Expert,
> > > Im doing BGP lab I create BGP neigh relationship between R1
> and
> > > SW1 but its not coming I also run eigrp because it is not
> > > directly neigh so from eigrp I'm getting route of SW1 and I'm also able
> > to
> > > ping but in bgp sh ip bgp summ command R1 status with Sw1 is active
> > .means
> > > there is no bgp neigh relation.
> > > Actually from R1 there is two path to reach Sw1
> > >
> > > SW1 - R6- R1-connected with R3 and R3 - Sw1 mean there is ring topology
> > >
> > > R1 getting routes from Sw1 via R3 and I create and my bgp neigh from
> > R1 -
> > > R6 - sw1
> > >
> > > So my Q is that is bgp neigh relation is also depend on IGP
> > > path selection.Because when I create static to words Sw1 by using same
> > path
> > > where I configure my BGP neigh relation its work R1 - R6 - Sw1 its work
> > > fine.
> > > But removing static neigh state becomes again active because eigrp
> > getting
> > > sw1 routes via R3 .. R1 - R3 -Sw1
> > >
> > > Thanks.
> > >
> > >
> > > Blogs and organic groups at http://www.ccie.net
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

--
Blogs and organic groups at http://www.ccie.net