[c-nsp] Multihoming

[Heath Jones]

Yeah it would work - 2 tunnels and routing done on your side.. Problem is
increased latency, jitter and lack of QOS, but for data traffic / backup /
something else that needs redundancy it should be ok. You could provide
managed firewalls etc etc for them - it's a product if thats what your
asking.. ;)



On 15 September 2010 17:42, Tim Huffman <Tim at bobbroadband.com> wrote:

> >Another option might be to get a small amount of space from each provider,
> >and VPN into something more stable/better connected.
>
> Something I've been considering is to have the customer build a GRE tunnel
> (its Internet traffic anyway) back to our router over their other ISP's
> connection. We could then route their public IP space over either
> connection.
>
> It doesn't give all the same benefits of BGP (for example, if something
> happens to my AS or router, the customer is screwed), but it should make for
> cheap and easy multihoming.
>
> Anybody have any thoughts on this?
>
> Tim Huffman
> Director of Engineering
> BOB - Business Only Broadband, LLC
> O (630) 590-6012
> C (630) 340-1925
> tim at bobbroadband.com
> www.bobbroadband.com
>
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:
> cisco-nsp-bounces at puck.nether.net] On Behalf Of Jon Lewis
> Sent: Wednesday, September 15, 2010 10:15 AM
> To: Walter Keen
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Multihoming
>
>  On Wed, 15 Sep 2010, Walter Keen wrote:
>
> > Not many options for you I'm afraid.  Some people filter out routes
> smaller
> > than a /24.  Even if you had a /24 from ISP1, you would then have to get
> > their permission to have ISP2 advertise it.  Most aren't willing to do
> this.
>
> Huh?  Get a /24 from one of the ISPs.  Get an ASN from ARIN or whoever is
> the appropriate registry for your area.  Advertise (BGP) that /24 to both
> ISPs.  I've never heard of an ISP not allowing this (except that most
> probably won't do BGP with you if you're on a "low end" connection like
> DSL/cable.  If you have some sort of leased line or ethernet connectivity
> to each provider, it shouldn't be an issue.
>
> > Is a micro (/24) allocation from ARIN (if in the US) a possibility?  If
> so,
> > you could then run BGP to multiple providers and make this a very simple
> > configuration.  If not, you'll likely have to rely on application-layer
> > redundancy.  You can prioritize MX records if you are hosting your mail
> > on-site through ISP1's ip addressing (what you stated seemed a bit
> unclear),
> > and you could probably do some round-robin DNS entries for web hosting,
> but
> > it won't be perfect.
>
> Another option might be to get a small amount of space from each provider,
> and VPN into something more stable/better connected.
>
> ----------------------------------------------------------------------
>  Jon Lewis, MCP :)           |  I route
>  Senior Network Engineer     |  therefore you are
>  Atlantic Net                |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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