IPv6 BGP table size comparisons

Frank Bulk - iName.com frnkblk at iname.com
Tue Dec 21 21:06:40 CST 2010


Looks like AS13722 (Default Route, Inc), is advertising both
2607:ff08:cafe::/48 and 2607:ff08::/32.

Frank

-----Original Message-----
From: Mike Tancsa [mailto:mike at sentex.net] 
Sent: Tuesday, December 21, 2010 6:19 PM
To: NANOG list
Subject: Re: IPv6 BGP table size comparisons

On 12/21/2010 7:10 PM, Mike Tancsa wrote:
> On 12/21/2010 5:18 PM, Frank Bulk wrote:
>> There are 4,035 routes in the global IPv6 routing table.  This is what
one
>> provider passed on to me for routes (/48 or larger prefixes), extracted
from
>> public route-view servers.
>>  AT&T AS7018: 2,851 (70.7%)
>>  Cogent AS174: 2,864 (71.0%)
>>  GLBX AS3549: 3,706 (91.8%)
>>  Hurricane Electric AS6939: 3,790 (93.9%)
>>  Qwest AS209: 3,918 (97.1%)
>>  TINET (formerly Tiscali) AS3257: 3,825 (94.8%)
>>  Verizon AS701: 3,938 (97.6%)
> 
> TATA (AS6453) out of Toronto, Canada  3,747.
> 
> For my v4 transit, I only see 0.3% difference from my largest and
> smallest view.   Where as with ipv6, the difference is almost 25%.  For
> /48 and shorter, I see 757 paths missing from AS174 that I see on my
> other 2 v6 transit providers.

While looking at whats missing, I found this interesting /48.

+2607:fed0::/32
+2607:fed8::/32
+2607:ff08:cafe::/48
+2607:ff20::/32


The 2607:ff08::/32 is visible on Cogent.  But I guess they are not
serving coffee there, only on TATA and HE.

    ---Mike






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