[AusNOG] dual home - set one carrier to secondary with AS prepend - not working

Mon Dec 21 13:26:24 EST 2015

Hi All,

First time post, so I hope this is the appropriate query for this list.

I'm trying to steer incoming traffic to our 3 x /24 networks via Testra as primary carrier.  On secondary link (nextgen) we use multiple AS path prepend on the BGP configuration.

Outgoing routing is fine, however incoming we still have substantial amount of traffic come in secondary link.  (approx. 50%)

Telstra think they are advertising correctly to internet and other carriers are overriding the advertisements based on commercial reasons.

Nextgen doesn't think Telstra are advertising correctly domestically.  

Using the looking glass tools, it looks like places like iinet are learning networks only via nextgen.
Telstra say optus looking glass shows network learnt ok via Telstra.
Iprimus seems to be the only one that has both, but prefers nextgen advertisement.
AAPT tracert goes via Telstra.

Thanks
Peter.
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