Hi
You may want to check out the RADWARE LinkProof
<http://www.radware.com/product/lproof/Default.htm>
<http://www.radware.com/product/pdfs/linkproof.pdf>
I have no personal experience with it but according to the specs it
should solve your problem(actually that was the design goal)
the general idea is that it will NAT your server address to one of several
ISP blocks in case of link failure/congestion/<whatever>
Hope this helps
Rafi
On Tue, 8 Aug 2000, Jason Lim wrote:
> Hi all,
>
> Actually, I need advise in dual-homing policy with our lease line
> customers. We have encountered some issues on lease lines customers
> wanting to dual-home their connection with our ISP(ISP1) and other
> ISP(ISP2) and this demand is growing. For example, a customer with two
> connection to ISP1(AS100) and ISP2(AS200) would be getting 203.222.100/24
> from ISP1 and 155.169.22/24 from ISP2. Customers wants redundency by
> asking ISP1 to advertise 155.69.22/24 and ISP2 to advertise
> 203.127.100/24 as well.
>
> The reasons why it's an issue because
>
> 1) These customers are not running BGP. I understand that conditional
> advertisment with BGP can solve the problem.
> 2) These customers wants ISP1 to advertise IPA blk which belong to
> other ISP2 and likewise for ISP2 to advertise ISP's IPA
>
> Well, currently there is now no mutual agreement with other ISPs to do so.
>
> I would like to know :
> 1) How will like to know how will it impact ISP1 and ISP2 in term of
> routing advertisment,tables,etc ?
> 2) Will ISP1 and ISP2 have problems of routing holes for advertising
> routes belonging to other ISPs' ASes.
>
> I am not sure if there are any other technical implication.
> How does other ISPs in US or other parts of the world
> dual-homed their customers' who do not run BGP(only statics route)?
> What are the pros/cons of doing/not doing this ??
>
> Thank you very much
> Regards
> Jason
> SingNet NOC
> Network Engineer
>
>
>
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