[c-nsp] Inbound redundancy with two ISPs

[Matt Addison]

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
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>
>   

_______________________________________________
cisco-nsp mailing list  cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/