[c-nsp] Inbound redundancy with two ISPs

[Paul Stewart]

We just went through this not that long ago...

Getting an ASN is $500 if I recall - getting a /24 portable subnet from ARIN
is *easy* if the specific purpose is for *multihoming*....  called ARIN and
confirmed....

Paul
 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Matt Addison
Sent: Thursday, November 01, 2007 11:00 AM
To: The Father; Cisco-NSP Mailing List
Subject: Re: [c-nsp] Inbound redundancy with two ISPs

Multihoming is a valid reason for justifying an ASN, however to get a block
from ARIN they would need to justify a full /24 of immediate use,
/23 within 12 months (the smallest block you can request when multihoming is
a /22).

http://www.arin.net/policy/nrpm.html#four3

Can't they get a /24 from one of their providers?

~Matt

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of The Father
Sent: Thursday, November 01, 2007 10:43 AM
To: Cisco-NSP Mailing List
Subject: Re: [c-nsp] Inbound redundancy with two ISPs

Is multihoming a valid reason even if they can't justify a /24 worth of IP
addresses?  I would have thought that ASNs were hard to get since there's a
finite number of them (currently anyways).

Oh and I forgot to mention in my original post that is there still a valid
solution if BGP is not an option?

Jose

P.S. Thanks for the replies so far guys.

Edward A. Trdina III wrote:
> Well, need more info... They have to have at least a /24 from that 
> provider, and then both ISPs should be willing to do BGP on their (the 
> customers behalf).  Otherwise, they should spply for an ASN from the 
> RiR.  Multihoming is a valid reason for an ASN per ARIN.
>
>
> Regards,
>  
> Edward A. Trdina III
>  
> Senior Network/Systems Engineer
>  
> Clayton Kendall, Inc.
> 150 West Street
> East Pittsburgh, PA 15112
>  
> Office (412)829-2201 x31
> Cell    (412)334-8000
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of The Father
> Sent: Thursday, November 01, 2007 8:45 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Inbound redundancy with two ISPs
>
> One of our customers is looking to us to provide a failover method for 
> their two internet access links.  Normally this wouldn't be a problem 
> but the customer has public IPs that were assigned to them from ISP-A 
> (we're ISP-B) and they use them for servers behind ISP-B's connection.

> They would like it so that when ISP-A goes down, the link that we 
> provide becomes primary and inbound and outbound traffic.  Does anyone 
> know of a Cisco (or other vendor) solution that could take care of
this?
> I've tried explaining that for customers in these situations, BGP and 
> public ASN/CIDR blocks are what's normally required for this to work.
>
> Thanks.
>
> Jose
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>
>   

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