Re: Dual-homing

[Joao Luis Silva Damas <]

At 16:51 +0200 4/10/00, Edgar Reinke wrote:
> Dear Madame,
>      dear Sir!
>
> Are there any RIPE documents available which describe address 
> assignment strategies for Multi-homed customer (multi-homed to 
> different ISPs):
Sections of RIPE 127, RIPE 185 and RIPE 147 come to mind.

> - Does those customers require PI address space?
No, if they agree with providers to have the chunk of PA space 
assigned to them by their LIR announced on the Internet. It takes 
both the LIR and the other providers to agree on this.

> - Does RIPE assign the PI address space (is it a /19 CIDR block)?
Only if necessary. The assignement of PI space is not the preferred 
option but will be granted if necessary.

The size of the assignement depends on the amount of addresses 
necessary (see RIPE 127, Sections 2 and 3) only.

> - If the customer has to use PA address space from ISP A, must ISP B 
> announce prefixes in addition to his CIDR blocks (or is it optional 
> for ISP B to comply with the wishes of his customer with respect to 
> the stability of the global routing system)
Each ISP decides their routing policy.
Routing decisions are taken by ISPs not Internet Registries.

Hope this helps.

Regards,
Joao Damas
RIPE NCC

> Regards
>
>  Edgar Reinke
>
> ____________________________________________
>
> Edgar Reinke
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