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New Member

load balancing and redundancy with 2 different ISPs

Hello guys!

1)What is the perfect design regading the load balancing and redundancy with 2 different ISPs

2)what is the cases of peering with ISPs using BGP not static route?

Thanks

12 REPLIES
New Member

Re: load balancing and redundancy with 2 different ISPs

Can you describe what you are trying to accomplish?  inbound or outbound lb / reduncancy, single site or multiple, etc?

New Member

Re: load balancing and redundancy with 2 different ISPs

hello

assume all situation.

Thanks

Hall of Fame Super Gold

Re: load balancing and redundancy with 2 different ISPs

1) BGP, public AS, and PI addresses.

2) see (1)

New Member

Re: load balancing and redundancy with 2 different ISPs

hi bevi!

pls list me a good design on both:have ur public as and private as or static route

Thanks

Hall of Fame Super Gold

Re: load balancing and redundancy with 2 different ISPs

search " bgp multihoming".

it cannot be done with static route.

Since all this is complicated and expensive, most people just use NAT load balancing.

New Member

Re: load balancing and redundancy with 2 different ISPs

pdf  much appreciated for this matter

Silver

Re: load balancing and redundancy with 2 different ISPs

you need to have your own IP space and AS number.  This is clean, and provides you the control over the announcement of your traffic.  Run BGP with ISP's,  would also investigate Pfr as an option.

New Member

Re: load balancing and redundancy with 2 different ISPs

hi

y mean that i have to buy a real AS or fake AS?

1)tell me how y do it with fake AS if is it possible to acheive both redundancy and load balance?

2)can we acheive redundancy and load balance if use static route as usual  to ISPs

3)take into ur consideration that i run GLBP on the edge router

Thanks

Silver

Re: load balancing and redundancy with 2 different ISPs

1.  Cannot use private AS if you want to control upstream traffic via the peers.  The only way to accomplish this is via public AS.

2.  As already indicated you cannot use static routing to accomplish this with 2 different ISP's.  If you used the same ISP and had the same POP you could run equal weight static routes and get what you are looking for, but that is not what you asked.

3.  GLBP is used before the edge, not on the edge.  GLBP is much like HSRP or VRRP in which routing is sent to the edge via specified criteria.  GLBP provides gateway load balancing.

New Member

Re: load balancing and redundancy with 2 different ISPs

thanks

New Member

Re: load balancing and redundancy with 2 different ISPs

thanks

Re: load balancing and redundancy with 2 different ISPs

Hi Alsayed

Please find a document attached with configuration examples.. am sure this doc will help you..

as other posters said, it is easy to do this with public AS's and by getting IP addresses from APNIC... with private AS it becomes really tough, as you will have to depend more on your upstream BGP peers for translating your BGP numbers ! anyways the document explains all scenarios you need.

Hope this helps.. all the best..


Raj

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