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

Mon Dec 21 13:36:28 EST 2015

Iinet looking glass shows    4739 2914 38809 45226 45226 45226 45226 45226 45226 45226 45226
(yes probably excessive amount of our AS)

AAPT shows
1221<http://www.apnic.net/apnic-bin/whois.pl?searchtext=AS1221> 45226<http://www.apnic.net/apnic-bin/whois.pl?searchtext=AS45226>,

From: Ben Hohnke [mailto:settra+ausnog at gmail.com]
Sent: Monday, 21 December 2015 1:00 PM
To: Mitchell, Peter; AusNOG at lists.ausnog.net
Subject: Re: [AusNOG] dual home - set one carrier to secondary with AS prepend - not working

Is tearing down the nextgen session for testing a possibility? That way you'd be able to find out if Telstra are advertising your prefixes correctly.
Also, does the looking glass results show the AS prepending correctly?
Ben

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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