Re: bgp

Hi,

You can create a route pointing to a fake subnet and track it with IPSLA,
for IPSLA use an interface on the FW. Then use BGP conditional route
advertisement to advertise 1.1.1.0/24 subnet only if your fake subnet is in
the BGP table. Please not for conditional BGP to work, subnets have to be in
the BGP table, hence you need to advertise the fake subnet in BGP and filter
it out the SP interface.

Please refer below link

http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a0080094309.shtml

Rgds

Uchil Perera
CCIE# 18536
On Thu, Nov 26, 2009 at 9:00 AM, jack daniels <jckdaniels12_at_gmail.com>wrote:

> but even if I poll FW and track it ,
> how to apply this IP SLA POLL to BGP router-map or network statement.
>
> On Thu, Nov 26, 2009 at 1:23 PM, ajaz nawaz <ajaz.nawaz_at_gmail.com> wrote:
>
> > IP SLA or other methods as suggested.
> >
> > Ajaz Nawaz
> > CCIE#15721
> >
> > 2009/11/26 jack daniels <jckdaniels12_at_gmail.com>
> >
> > > Hi,
> > >
> > > Subnets are same as in advertise map and conditional map , plzz check
> the
> > > diag
> > >
> > > On Thu, Nov 26, 2009 at 1:15 PM, Shaughn Smith <shaughn.s_at_cvnnet.co.za
> > > >wrote:
> > >
> > > > What about using an advertise-map in BGP ?
> > > >
> > > > -----Original Message-----
> > > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf
> > Of
> > > > jack daniels
> > > > Sent: Thursday, November 26, 2009 9:37 AM
> > > > To: Cisco certification
> > > > Subject: bgp
> > > >
> > > > Hi All,
> > > >
> > > > I have a customer scenario where
> > > >
> > > >
> > > > ISP 2.2.2.1----2.2.2.2 router1.1.1.1/24 -------Switch -----------
> > > > 1.1.1.2/24FW------LAN
> > > >
> > > >
> > > > ISP and router are running BGP. Now I want to advertise the
> 1.1.1.0/24
> > > > when
> > > > FW is up if FW is down I dont want to advertise this subnet. I have
> > > > redundancy so will use redundant media and firewall . my querriery is
> > > > how
> > > > not to advertise in BGP 1.1.1.0/24when my FW is down.
> > > >
> > > >
> > > > Blogs and organic groups at http://www.ccie.net
> > > >
> > > >
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Received on Thu Nov 26 2009 - 09:55:31 ART