Thanks Alexander that helps! Best wishes, Amadeus

---- Original Message ---- From: Alexander Shikov <a.shikov@dtel-ix.net> To: "Amadeus" <amadeus@freehop.mooo.com> Cc: bird-users@network.cz Sent: Fr, Okt 25, 2013, 5:30 PM Subject: Re: BGP path prepend / route selection

Hi,

On Fri, Oct 25, 2013 at 03:56:45PM +0000, Amadeus wrote:

...

Dear list, can you explain why the following route (0.0.0.0/0) is selected to go via as403, as as4057 clearly displays the shortest path here? As you can see I have used bgp_path.prepend() 3x on as403 for its own ASN. Thanks, Amadeus bird> show route for 0.0.0.0/0 table ffc all 0.0.0.0/0 via 169.254.40.3 on ffc403 [as403 14:38] * (150) [AS403i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 403 403 403 403 BGP.next_hop: 169.254.40.3 BGP.local_pref: 100 via 169.254.40.64 on ffc4064 [as4064 14:32] (100) [AS4057i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 4064 40120 4057 BGP.next_hop: 169.254.40.64 BGP.local_pref: 100 via 169.254.40.57 on ffc4057 [as4057 Oct14] (100) [AS4057i] Type: BGP unicast univ BGP.origin: IGP BGP.as_path: 4057 BGP.next_hop: 169.254.40.57 BGP.local_pref: 100

it is because local-pref. Default route to AS403 has higher local-pref than one to AS4057.

-- Alexander Shikov Technical Staff, Digital Telecom IX Tel.: +380 44 201 14 07 http://dtel-ix.net/