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List:       afnog
Subject:    Re: [afnog] Adding Bandwidth
From:       Mark Tinka <mtinka () globaltransit ! net>
Date:       2010-01-08 17:46:06
Message-ID: 201001090146.12708.mtinka () globaltransit ! net
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On Saturday 09 January 2010 12:54:38 am Pamela Pomary wrote:

> Hello Mark

Hi Pamela.

> 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?

Since you have an AfriNIC allocation, do go ahead and apply 
for an ASN as well, if you haven't already. One note on 
ASN's, though, if you don't have one and apply for it today, 
you will only receive a 32-bit ASN from AfriNIC. This means 
you're better off having a border router that supports 4-
byte ASN's.

Having taken care of the above, since you have your own 
allocation, relegate the use of your ISP's IP addresses to 
the point-to-point link between your network and theirs, 
i.e., a /30 assignment to the point-to-point interfaces.

With that done, use BGP to announce your AfriNIC allocation 
to your ISP's. Ensure that your ISP's support BGP (with 
you), and that they won't have problems handling 4-byte 
ASN's.

On BGP and BGP Multi-homing, check out the following:

http://ws.afnog.org/afnog2009/sie/detail.html#topic-240-bgp
http://www.nanog.org/meetings/nanog28/presentations/smith.pdf

It's likely you'll have a bunch of questions along the way. 
Feel free to post at anytime.

Cheers,

Mark.

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