Re: BGP Multi-homing

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:
>> >>>>> 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
>>
>> _______________________________________________________________________
>> 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
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
> --
> Andrew Lee Lissitz
> all.from.nj_at_gmail.com

Blogs and organic groups at http://www.ccie.net
Received on Mon Jul 13 2009 - 10:49:36 ART