v6 routing pessimism

[Carlos Friacas]

On Wed, 18 May 2005, Juha Suhonen wrote:

> On Wed, 18 May 2005, Nick Hilliard wrote:
>
>> You know, it's always fun when traffic takes a slightly circuitous route 
>> from A to B, but is it really necessary for ipv6 from dublin to amsterdam 
>> to go:
>
>> And before anyone starts pointing the finger at the immediate upstream 
>> (AS2110), this goes well beyond any misconfiguration they might have.
>> 
>> The AS path is a hilarious "2110 3549 11537 17579 1237 17832 24136 109 109 
>> 6939 3257 3333" - ouch!
>
> We "fixed" this same issue today for ourselves by filtering 2001:610:240::/42 
> off - apparently somebody doesn't care about the "no-export" tag set by RIPE 
> on all their peers.. Please, correct me if I'm wrong, but if you don't 
> directly peer with RIPE you shouldn't see this more-specific prefix at all?
>
>
> 2001:610:240::/42  *[BGP/170] 1d 08:24:22, MED 50, localpref 90
>                      AS path: 6667 3549 11537 17579 1237 17832 24136 109 109 
> 6939 3257 3333 I
>                    > to 2001:1430:0:1::2 via ge-1/3/0.5


yep, i dont see it. i only see 2001:610::/32


> .. goes away and is replaced by ..
>
> 2001:610::/32      *[BGP/170] 1w0d 16:48:24, MED 50, localpref 90
>                      AS path: 3246 1103 I
>                    > to 2001:1430::ffff:2 via ge-1/3/0.50

which is surfnet (my v6 roundtrip to www.ripe.net is ~37ms, from Lisbon)
:-)


./Carlos
--------------                    http://www.ip6.fccn.pt/nativeRCTS2.html

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