Routing problems to www.eurovision.tv 2400:CB00::/32 CLOUDFLARE
Tom Paseka
tom at cloudflare.com
Fri Jun 15 18:42:33 CEST 2012
Hi Chris,
Understand this, but the filtering in tern is going to leave you
disconnected from very large portions of the internet. CloudFlare is not
the only provider using routing like this, without an aggregate matching
the minimum allocation size.
Large numbers of content providers (not just CloudFlare) who do not
operate contiguous networks are doing this so. We are discontiguous, so are
unable to route between nodes internally. There are also many access
providers who are not announcing the full subset of their routes, so
reachability will be a problem.
You may note, all Tier-1 carriers are carrying our routes today and I can
see from your looking glass that you are receiving our routes, just
filtering.
I understand you want to protect your routers memory, however, could you
install default routes? As I mentioned there are many other parts of the
IPv6 table that you'll be missing out on, without either accepting the full
table, or a default.
Best Regards,
Tom
On Fri, Jun 15, 2012 at 9:28 AM, Chris Welti <chris.welti at switch.ch> wrote:
> Hello Tom,
>
> Then you should have applied for /48 portable address space for all your
> different regions.
> APNIC has a separate address space for this in 2001:0C00:/23
> See
> http://www.apnic.net/publications/research-and-insights/ip-address-trends/minimum-allocations
> We strictly filter by minimum allocation polices of the RIR and don't make
> exceptions.
> The problem with just accepting all /48 is that you end up with a lot of
> unnecessary /48 deaggregations in the table, even if there
> would be a covering /32.
>
> Btw within your AS you should be able to route all your prefixes yourself,
> otherwise it wouldn't be an autonomous system :)
>
> Regards,
> Chris
>
> Am 6/15/12 6:08 PM, schrieb Tom Paseka:
> > Hello Chris,
> >
> > CloudFlare operates a discontiguous network and we are unable to
> announce the /32.
> >
> > The /48 is a valid announcement for the global table. While we
> understand there are some concerns about de-aggergation, aggregation is not
> possible and we would either be announcing the deaggregated address space
> from a single assignment, or we'd have multiple assignments for the same
> purpose, so the impact on the routing table would be the same.
> >
> > If the full table can not be accepted, I would recommend installing a
> default route to one or all of your upstreams, otherwise many parts of the
> global table will not be reachable, not just to CloudFlare.
> >
> > Thanks,
> > Tom
> >
> > On Fri, Jun 15, 2012 at 8:57 AM, Chris Welti <chris.welti at switch.ch<mailto:
> chris.welti at switch.ch>> wrote:
> >
> > This could be because there is no covering 2400:CB00::/32 route by
> Cloudflare in the global IPv6 routing table.
> > There is only 2400:CB00:2048::/48 and this might be filtered by ISPs
> due to the APNIC miniumum allocation size of /32 for 2400::/12.
> > Cloudflare must announce at least the covering /32 for it to be
> globally reachable.
> >
> > Regards,
> >
> > Chris
> > AS559
> >
> > Am 6/15/12 4:08 PM, schrieb Thomas Schäfer:
> > > The (web) access to
> > >
> > > www.eurovision.tv <http://www.eurovision.tv>
> > >
> > > has some problems:
> > >
> > > from LRZ/DFN ok
> > > from Sixxs-Tunnel failed
> > > via http://ipv6-test.com/validate.php ok
> > > via sixy.ch <http://sixy.ch> (adding failed) failed
> > >
> > >
> > > traceroute from sixxs
> > >
> > >
> > >
> > > traceroute www.eurovision.tv <http://www.eurovision.tv>
> > > traceroute to www.eurovision.tv <http://www.eurovision.tv>
> (2400:cb00:2048:1::6ca2:c904), 30 hops max, 40 byte packets using UDP
> > > 1 fritz.box (2001:6f8:120c:0:21c:4aff:fe28:8a31) 0.664 ms
> 0.489 ms 0.504 ms
> > > 2 gw-892.ham-01.de.sixxs.net <http://gw-892.ham-01.de.sixxs.net>
> (2001:6f8:900:37b::1) 39.374 ms 38.900 ms 38.261 ms
> > > 3 2001:6f8:862:1::c2e9:c729 (2001:6f8:862:1::c2e9:c729) 38.653
> ms 37.531 ms 36.400 ms
> > > 4 vl2280.cr10.noham.de.easynet.net <
> http://vl2280.cr10.noham.de.easynet.net> (2001:6f8:862:1::c2e9:c72c)
> 44.705 ms 43.567 ms 42.446 ms
> > > 5 2001:6f8:1:0:87:86:69:214 (2001:6f8:1:0:87:86:69:214) 41.202<tel:214%29%20%2041.202> ms * *
> > > 6 2001:6f8:1:0:87:86:77:83 (2001:6f8:1:0:87:86:77:83) 37.765 ms
> * *
> > > 7 2001:6f8:1:0:87:86:77:62 (2001:6f8:1:0:87:86:77:62) 51.138 ms
> * *
> > > 8 2001:6f8:1:0:87:86:77:71 (2001:6f8:1:0:87:86:77:71) 44.403 ms
> * *
> > > 9 2001:6f8:1:0:87:86:77:15 (2001:6f8:1:0:87:86:77:15) 53.309 ms
> * *
> > > 10 2001:6f8:1:0:87:86:77:47 (2001:6f8:1:0:87:86:77:47) 58.516 ms
> * *
> > > 11 2001:7f8:1::a501:3335:1 (2001:7f8:1::a501:3335:1)(H!)
> 2100.484 ms * *
> > >
> > >
> > > LANG=C wget -6 www.eurovision.tv <http://www.eurovision.tv>
> > > asking libproxy about url 'http://www.eurovision.tv/'
> > > libproxy suggest to use 'direct://'
> > > --2012-06-15 16:07:55-- http://www.eurovision.tv/
> > > Resolving www.eurovision.tv... 2400:cb00:2048:1::6ca2:cb04,
> 2400:cb00:2048:1::6ca2:cc04, 2400:cb00:2048:1::6ca2:cd04, ...
> > > Connecting to www.eurovision.tv <http://www.eurovision.tv>|2400:cb00:2048:1::6ca2:cb04|:80...
> failed: No route to host.
> > > Connecting to www.eurovision.tv <http://www.eurovision.tv>|2400:cb00:2048:1::6ca2:cc04|:80...
> failed: No route to host.
> > > Connecting to www.eurovision.tv <http://www.eurovision.tv>|2400:cb00:2048:1::6ca2:cd04|:80...
> failed: No route to host.
> > > Connecting to www.eurovision.tv <http://www.eurovision.tv>|2400:cb00:2048:1::6ca2:ca04|:80...
> failed: No route to host.
> > > Connecting to www.eurovision.tv <http://www.eurovision.tv>|2400:cb00:2048:1::6ca2:c904|:80...
> failed: No route to host.
> > >
> > >
> > >
> > >
> > >
> > >
> > > Regards,
> > >
> > > Thomas Schäfer
> > >
> > >
> > >
> >
> >
>
>
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