Re: BGP Multi-homing

Yep, just track the IPs ... all works well.

;-)

On Thu, Jul 9, 2009 at 3:22 PM, <ron.wilkerson_at_gmail.com> wrote:

> You can avoid this situation by using object tracking.
> -----Original Message-----
> From: "Joseph L. Brunner" <joe_at_affirmedsystems.com>
>
> Date: Thu, 9 Jul 2009 15:18:37
> To: Jian Gu<guxiaojian_at_gmail.com>; olumayokun fowowe<olumayokun_at_gmail.com>
> Cc: Johnny Phan<johnny_d_phan_at_hotmail.com>; Scott Morris<smorris_at_ine.com>;
> Cisco certification<ccielab_at_groupstudy.com>
> Subject: RE: BGP Multi-homing
>
>
> PBR sounds like a solution in search of problem;
>
> Ergh
>
> Wont Cisco learn?
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Jian Gu
> Sent: Thursday, July 09, 2009 1:24 PM
> To: olumayokun fowowe
> Cc: Johnny Phan; Scott Morris; Cisco certification
> Subject: Re: BGP Multi-homing
>
> Problem with PBR solutions is that PBR can not detect BGP failure, as
> long as nexthop is reachable, traffic will be blindly forwarded. For
> example, if ISP1's peering router BGP fails for whatever reason, and
> it stops advertising default-route to you, you will be still sending
> traffic originated from ISP1 address to ISP1, and traffic will be
> blackholed.
>
> I think the better way is to get full or partial internet feed from
> them and than tweak weight/local preference with route maps.
>
> On Thu, Jul 9, 2009 at 5:03 AM, olumayokun fowowe<olumayokun_at_gmail.com>
> wrote:
> > Thanks all,
> >
> > I guess I will go with Scott's advice on PBR. I have simulated this and
> it
> > seems to achieve just what I want.
> >
> > Regards,
> > 'Mayokun
> >
> >
> > On 7/7/09, Johnny Phan <johnny_d_phan_at_hotmail.com> wrote:
> >>
> >> Thanks for clarifying Scott.
> >>
> >> Basically I work for a Saas where they get have two ISPs, each with
> >> different commit cost and bursting cost. The basic idea is to have BGP
> be
> >> intelligent enough so it will use the commit of both circuits before
> >> bursting, incurring extra charge. So it is more sharing than balancing,
> but
> >> sharing intelligently. We are also an ISP passing on the full internet
> >> route, so it will be interesting to find out how taxing this feature
> will be
> >> on the router.
> >>
> >> Sorry, I didn't mean to steal the thread, but thought it might help.
> >>
> >> I look forward to your report Luan. Thanks.
> >>
> >> ----- Original Message ----- From: "Scott Morris" <smorris_at_ine.com>
> >> To: "Johnny Phan" <johnny_d_phan_at_hotmail.com>
> >> Cc: "olumayokun fowowe" <olumayokun_at_gmail.com>; "Cisco certification" <
> >> ccielab_at_groupstudy.com>
> >> Sent: Tuesday, July 07, 2009 1:57 PM
> >> Subject: Re: BGP Multi-homing
> >>
> >>
> >> I suppose that all depends on what your answer about "balance" versus
> >>> "share" is. Is 1:1 traffic-share actually a balance between the two?
> >>>
> >>> OER is about optimization not about balancing per se (unless you do
> >>> already) PfR is a theorhetical concept, but a nice one. But either
> >>> path you take, how well it operates depends on your definitions and
> >>> perceptions of the above two terms!
> >>>
> >>> I can give you two paths to go. How often to take either, or what you
> >>> take on either is a different story.
> >>>
> >>> Understand your options and build accordingly!
> >>>
> >>>
> >>>
> >>>
> >>> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider)
> #4713,
> >>>
> >>> JNCIE-M #153, JNCIS-ER, CISSP, et al.
> >>>
> >>> JNCI-M, JNCI-ER
> >>>
> >>> evil_at_ine.com
> >>>
> >>>
> >>> Internetwork Expert, Inc.
> >>>
> >>> http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
> >>>
> >>> Toll Free: 877-224-8987
> >>>
> >>> Outside US: 775-826-4344
> >>>
> >>>
> >>> Knowledge is power.
> >>>
> >>> Power corrupts.
> >>>
> >>> Study hard and be Eeeeviiiil......
> >>>
> >>>
> >>>
> >>> Johnny Phan wrote:
> >>>
> >>>> I keep seeing the response as there's no way to load balance, only
> >>>> load sharing.
> >>>>
> >>>> Has anyone been able to use OER or PFR successfully ?
> >>>>
> >>>> ----- Original Message ----- From: "Scott Morris" <smorris_at_ine.com>
> >>>> To: "olumayokun fowowe" <olumayokun_at_gmail.com>
> >>>> Cc: "Cisco certification" <ccielab_at_groupstudy.com>
> >>>> Sent: Monday, July 06, 2009 8:38 AM
> >>>> Subject: Re: BGP Multi-homing
> >>>>
> >>>>
> >>>> For outbound, just use PBR. That way, one of your subnets (source)
> goes
> >>>>> to ISP1 and the other goes towards ISP2. Very simplistic.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> *Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider)
> #4713,
> >>>>>
> >>>>> JNCIE-M #153, JNCIS-ER, CISSP, et al.
> >>>>>
> >>>>> JNCI-M, JNCI-ER
> >>>>>
> >>>>> evil_at_ine.com
> >>>>>
> >>>>>
> >>>>> Internetwork Expert, Inc.
> >>>>>
> >>>>> http://www.InternetworkExpert.com <
> http://www.internetworkexpert.com/>
> >>>>>
> >>>>> Toll Free: 877-224-8987
> >>>>>
> >>>>> Outside US: 775-826-4344
> >>>>>
> >>>>>
> >>>>> Knowledge is power.
> >>>>>
> >>>>> Power corrupts.
> >>>>>
> >>>>> Study hard and be Eeeeviiiil......
> >>>>>
> >>>>>
> >>>>>
> >>>>> olumayokun fowowe wrote:
> >>>>>
> >>>>>> Hello all,
> >>>>>>
> >>>>>> I am multi-homing to the internet via two ISPs, and both of them are
> >>>>>> sending
> >>>>>> just default routes to me. I have two blocks of IPs that I am
> >>>>>> advertising to
> >>>>>> the internet. The challenge I am having is tweeking BGP so that
> >>>>>> traffic from
> >>>>>> a particular block use ISP1 while traffic from the other block of IP
> >>>>>> should
> >>>>>> use ISP2. I have been able to tweek inbound traffic from the
> >>>>>> internet but I
> >>>>>> am having issues with the outbound traffic because of the fact that
> >>>>>> Iam just
> >>>>>> receiving default routes from the providers. Does anyone have a
> >>>>>> solution for
> >>>>>> me?
> >>>>>>
> >>>>>> Thanks,
> >>>>>>
> >>>>>> Olumayokun
> >>>>>>
> >>>>>>
> >>>>>> 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:
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> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
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>
> Blogs and organic groups at http://www.ccie.net
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> _______________________________________________________________________
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>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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-- 
Andrew Lee Lissitz
all.from.nj_at_gmail.com
Blogs and organic groups at http://www.ccie.net