OER/PfR with BGP for inbound load sharing

Dobbins, Roland rdobbins at arbor.net
Wed Jul 14 10:10:20 CDT 2010


On Jul 14, 2010, at 9:55 PM, Dylan Ebner wrote:

>  I should look for other options to balance my inbound traffic. 


Beyond the binary choice to advertise or not to advertise a given prefix via a given peer/upstream and/or any TE policies your peers/upstreams may support via community/attribute tagging, you've really no control over inbound traffic path selection.  You can prepend, but whether other networks honor it or ignore it - or if they do honor it, *how* they honor it - is entirely beyond your control.

So, vendor marketing claims aside, the concept of 'load-balancing' inbound traffic isn't really a valid one.

The only actual path-selection control you have is over your outbound traffic, and that only for a single hop beyond your network, into each of your peers/upstreams.  What happens after that is beyond your control, as well.

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Roland Dobbins <rdobbins at arbor.net> // <http://www.arbornetworks.com>

    Injustice is relatively easy to bear; what stings is justice.

                        -- H.L. Mencken







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