Re: BGP Multi-homing

Have a read through this:
http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtpbrtrk.html?bcsi_scan_65BDCDFBD5D30EAB=0&bcsi_scan_filename=gtpbrtrk.html

I used this feature quite successfully a couple of years ago when
implementing some F5 WanJets as a tranparent proxy into an existing
environment. I'm sure you can make it work for your needs. Object
tracking gives you alot of options.

On Mon, Jul 13, 2009 at 10:49 AM, olumayokun fowowe<olumayokun_at_gmail.com> wrote:
> Hell all,
>
> Any sample config for object tracking that might work?
>
> Thanks,
> 'Mayokun
>
>
> On 7/9/09, ALL From_NJ <all.from.nj_at_gmail.com> wrote:
>>
>> 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/><
>>> 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/><
>>> 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:
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>>> >>>>>
>>> >>>>
>>> >>>
>>> >>> Blogs and organic groups at http://www.ccie.net
>>> >>>
>>> >>>
>>> _______________________________________________________________________
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>>> >
>>> >
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>>> >
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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
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
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>>>
>>> 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
>
> _______________________________________________________________________
> Subscription information may be found at:
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Received on Mon Jul 13 2009 - 11:21:04 ART