[afnog] Adding Bandwidth

Fri Jan 8 16:54:38 UTC 2010

Hello Mark

This topic seem interesting to me as we have a similar situation in our
network.
We have our own IPs from Afrinic. We have two ISPs we connect to with
different IP blocks.
I want you to clarify how doing BGP with the two different ISPs, can put
all three or two different bandwidths into one pipe while
maintaining ISP's ipblock on the border routers and keeping our own
ipblock from Afrinic in the internal network?

Thank You

Pamela

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> Today's Topics:
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>    1.  Routing - Adding Bandwidth (Benjamin Cobblah)
>    2. Re:  Routing - Adding Bandwidth (Mark Tinka)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 7 Jan 2010 18:07:33 +0000 (GMT)
> From: Benjamin Cobblah <cbnayai at yahoo.co.uk>
> To: afnog <afnog at afnog.org>
> Subject: [afnog] Routing - Adding Bandwidth
> Message-ID: <981758.66982.qm at web25005.mail.ukl.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I kind of have a challenge.
>
> I have 3 ISP,s?each suppling me with?a 4 MB?bandwidth of internet. All
> work?perfectly for various services in their own respect.
>
> I have a failover (high availability)?setup for these 3 ISP's such that if
> one fails another kicks in automatically.
>
> The challenge is that i would like to bundle all the 12MB in one pipe so
> that at a given session i have 12 MB to distribute at will and also
> maintain my failover solution.
>
> Is there a way to do this?
>
> Any help would be appreciated especially if it boils into the software
> router solution.
>
> Best regards,
>
> Benjamin
>
>
>
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> ------------------------------
>
> Message: 2
> Date: Fri, 8 Jan 2010 02:37:04 +0800
> From: Mark Tinka <mtinka at globaltransit.net>
> To: Benjamin Cobblah <cbnayai at yahoo.co.uk>
> Cc: afnog <afnog at afnog.org>
> Subject: Re: [afnog] Routing - Adding Bandwidth
> Message-ID: <201001080237.09265.mtinka at globaltransit.net>
> Content-Type: text/plain; charset="us-ascii"
>
> On Friday 08 January 2010 02:07:33 am Benjamin Cobblah
> wrote:
>
>> The challenge is that i would like to bundle all the 12MB
>>  in one pipe so that at a given session i have 12 MB to
>>  distribute at will and also maintain my failover
>>  solution.
>
> You don't mention how the links are being delivered...
> Ethernet, PPP, e.t.c., nor what platforms you're using.
>
> What you need is load balancing, but there are 2 layers and
> 3 issues to consider:
>
> 	* At Layer 2; if Ethernet, doubtful 802.1AX (Ethernet) or
> 	  ML-PPP would be useful since these are separate ISP's.
>
> 	* At Layer 3; if each of the ISP's are assigning you
> 	  addresses from their own allocations, directly putting
> 	  traffic on each link simultaneously won't be straight
> 	  forward. You could do it by placing different internal
> 	  devices on the different IP addresses, but I'm guessing
> 	  the bulk of your (inbound) traffic will be user-based web
> 	  browsing or the like.
>
> 	* The third issue is if you're using NAT. Multi-homing with
> 	  NAT is fairly doable. Multi-homing + load balancing with
> 	  NAT, a little more interesting :-). Cisco have a feature
> 	  called OER (Optimized Edge Routing), you could take a
> 	  look at it and see if it's close to what you need
> 	  (assuming you have NAT):
>
> http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a00808d2b72.shtml
>
> The easiest solution would be for your to run BGP with your
> ISP's. This works best when you have your own address space
> and ASN allocations from AfriNIC (in case you don't
> already). But this depends on a number of things, one of
> which is whether your ISP's support BGP for customers, and
> if so, whether they'll run it with you, among other issues.
>
> More information about your setup, ISP environment, AfriNIC
> allocation status (if any), e.t.c., would be helpful.
>
> Cheers,
>
> Mark.
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