Re: Sham-Link - Problem

I was reading your post and thinking to myself i need to setup this up to
double check myself and i just spent the last 1 and half on it because my
sham-link would not come up...

i forgot to redistribute my bgp routes on my PE into my ospf vrf process, it
is always something....

about the capability vrf-lite, that is only needed to ignore/disable (not
sure which really?? i need to dig a little deeper i just know it needs to be
on/off to work right now so much more to learn) the DN or DOWN bit checks
when not running BGP or 'real' VRF on the PE router, but doing 'vrf-lite'
the checks do not apply when using BGP on the PE

"In some situations, performing PE checks might not be desirable. The
concept of VRFs can be used on a router that is not a PE router (that is, a
router that is not running BGP). With the *capability vrf-lite* command, the
checks can be turned off to allow correct population of the VRF routing
table with routes to IP prefixes. "

http://www.cisco.com/en/US/customer/docs/ios/iproute_ospf/command/reference/iro_osp1.html#wp1012376

good post...
thanks..
garry..

On Fri, Mar 26, 2010 at 9:15 PM, CCIE-Newbie <ccie_ka_at_gmx.de> wrote:

> Hi,
>
> the problem was solved..
> I removed the capability vrf-lite under the ospf 1 vrf xxx
> and then it works...
>
> Maybe I only need the capability vrf-lite only if I don't have a
> sham-link ?!
>
> So now it works..
>
> Now I want to understand why...;-))
>
> Dennis
>
> Am Freitag, den 26.03.2010, 17:29 +0000 schrieb Marko Milivojevic:
> > Make sure that your sham-link endpoints are not redistributed into OSPF.
> >
> > --
> > Marko Milivojevic - CCIE #18427
> > Senior Technical Instructor - IPexpert
> >
> > YES! We include 400 hours of REAL rack
> > time with our Blended Learning Solution!
> >
> > Mailto: markom_at_ipexpert.com
> > Telephone: +1.810.326.1444
> > Fax: +1.810.454.0130
> > Web: http://www.ipexpert.com/
> >
> > On Fri, Mar 26, 2010 at 17:13, CCIE-Newbie <ccie_ka_at_gmx.de> wrote:
> > > Hi Group,
> > >
> > > I'm trying so long to configure a sham-link between two PE router ...
> > > The sham-link source and destination address is in the vrf routing
> table
> > > and this ip address is advertised through MP-BGP..
> > > When I do show ip route vrf XX
> > > I saw the routes on both sides...
> > >
> > > Next I debug OSPF
> > > 1. area 0 sham-link <source IF> <des IF>
> > >
> > > there comes a message from OSPF
> > > OSPF : starting sham-link interface
> > > OSPF : no route to sham-link destination x.x.x.x
> > >
> > > This seems to be strange for me because this interface is configured
> > > with the "ip forwarding vrf XX" and also is advertised in the
> > > "address-family ipv4 vrf XX
> > > network x.x.x.x mask y.y.y.y
> > >
> > > THe Interface is defined as a host address (32 bit)
> > >
> > > Maybe I read all about configuring sham-links...but this doesn't come
> > > up ...;-(
> > >
> > > I tried so long and this makes me grazy...
> > >
> > > Thanks for all advice
> > >
> > > Dennis
> > >
> > >
> > > 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
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Mar 26 2010 - 22:35:44 ART