Re: BGP Load Balancing

Ron,
there is no NAT. ISPs are just peering with the customer, and he has his
own network. It's not ISP A or ISP B public address, it's the customer
public address.

I don't think you can get a PI /27. The smaller I know are legacy /24.
-Carlos

ron wilkerson @ 02/09/2012 16:41 -0300 dixit:
> Consider this...
> If outbound goes out using ISP A, it will use ISP A's public IP. All
> returning traffic sourced from ISP A will come back through ISP A's circuit.
> The same logic applies for ISP B. No matter which ISP the return
> traffic comes back through, it'll always come back through the ISP that
> originated the traffic.
>
> The return traffic that went out ISP A won't come back via ISP B as ISP
> A "owns/routes" their public IP block.
>
> If you're using your own public block that is being routed in the
> Internet, then that changes the pictures a bit.
> If you're using a small /27 or something like that from each ISP, the
> return traffic is guaranteed to come back on the circuit that it left on.
>
> Ron
>
> On Thu, Aug 30, 2012 at 9:16 AM, Nicky <ccienovice_at_gmail.com
> <mailto:ccienovice_at_gmail.com>> wrote:
>
> Ron,
>
> The return traffic wont be load balanced as it totally depends on
> the ISP and the upstream ISP.
>
> Abraham,
>
> I dont have any such kind of scenario with me. I was just thinking
> on different BGP implementations. There is no NATing involved.
>
> Carlos has rightly mentioned that the networks would be originating
> from the customers network.
>
> Regards,
> Nick
>
>
>
> On Thu, Aug 30, 2012 at 3:27 PM, Carlos G Mendioroz
> <tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>> wrote:
>
> Ron, Abraham,
> that depends. Remember that he IS running BGP, so he may just as
> well have his own network/s and be originating with the same
> address regaardles of outgoing interface ?
>
> -Carlos
>
> Abraham, Tharak @ 30/08/2012 02:04 -0300 dixit:
>
> Hey Nicky,
>
> What are your obervations with the trace ?
>
> If the ISP is NATting your traffic out then the incoming
> traffic will be
> load balanced, otherwise it doesn't.
>
> For outgoing. you have the control.
>
> If you can run BGP with the consent of both ISPs, then you
> would have
> better control with in and out flows.
>
> Best Regards,
> Tharak Abraham Luke
>
>
> On Tue, Aug 28, 2012 at 11:20 PM, ron wilkerson
> <ron.wilkerson_at_gmail.com
> <mailto:ron.wilkerson_at_gmail.com>>__wrote:
>
> The return traffic will be load shared as this will be
> determined by the
> outgoing source IP.
> With regards to traffic initiated from the outside
> towards your office, I
> don't know of a way to load share that traffic.
> Not aware of a way to load share over 2 circuits for a
> single IP.
>
> You could manually do this via DNS I suppose.
>
> Hoping someone has a solution!
>
> Ron
>
>
> On Tue, Aug 28, 2012 at 10:59 AM, Nicky
> <ccienovice_at_gmail.com <mailto:ccienovice_at_gmail.com>> wrote:
>
> Hi All,
>
> If there are two ISP terminating on two different
> routers and only
>
> default
>
> route is accepted from ISP then can I load balance
> the traffic?
>
> AFAIK the outgoing traffic will be load balanced but
> not possible for
> incoming traffic.
>
> Regards,
> Nick
>
>
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>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>>
> LW7 EQI Argentina
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net