[AusNOG] Inbound BGP traffic balancing

[Nathan Brookfield]

Your best option is to AS-PATH-PREPEND the better of the two carriers until you get a good balance, adding one AS hop to the outbound announcement is usually enough to make a fair difference but there is no way to ensure 50/50, it's just not going to happen especially if one of your upstream's is a carrier like Vocus who are well peered across the world.


Kindest Regards,

Nathan Brookfield (VK2NAB)



Chief Executive Officer

Simtronic Technologies Pty Ltd



Local: (02) 4749 4949 | Fax: (02) 4749 4950 | Direct: (02) 4749 4951

Web: http://www.simtronic.com.au<http://www.simtronic.com.au/> | E-mail: nathan.brookfield at simtronic.com.au<mailto:nathan.brookfield at simtronic.com.au>



________________________________
From: AusNOG <ausnog-bounces at lists.ausnog.net> on behalf of Matt Selbst <matt.j.selbst at gmail.com>
Sent: Monday, 27 February 2017 3:22 PM
To: ausnog at lists.ausnog.net
Subject: [AusNOG] Inbound BGP traffic balancing

Hi All,

I've currently got transit from two of the major carriers and it seems that if I don't do any manipulation BGP naturally makes about 90% of the traffic come through the one carrier and only ~10% through the other.

I've tried all the usual tricks like shorter prefixes, communities etc but not really getting much that I can rely on for even split.

Is there a much more reliable way of evenly balancing inbound traffic 50/50?  I'm open to commercial solutions if one exists.


-Matt

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