Facebook doesn't have a route to my ISP's (Cogeco) IPv6 space?

Fri Dec 21 04:11:31 UTC 2018

On Thu, 2018-12-20 at 17:28 -0600, Constantine A. Murenin wrote:
> Hi Brian,

Hi,

> But what's exactly at 2a03:2880:f012:3:face:b00c:0:1?

It's one of the endpoints involved in Facebook's Messenger service. 
IIRC it's "graph.facebook.com", although I note that that address is
currently answering as:

graph.facebook.com.	2068	IN	CNAME	api.facebook.com.
api.facebook.com.	2068	IN	CNAME	star.c10r.facebook.com.
star.c10r.facebook.com.	25	IN	AAAA	2a03:2880:f00e:a:face:b00c:0:2

To be fair though, that one could just be what a load-balancing name
service is responding at the moment.  Notice that the two addresses are
only off by one.

But even more interesting is that it's now working:

                                My traceroute  [v0.92]
pc.interlinx.bc.ca (2001:1970:5261:d600:c5d9:3319:afbc:3bb6) 2018-12-20T23:07:14-0500
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                             Packets               Pings
 Host                                      Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 2001:1970:5261:d600::1                  0.0%    94    0.6   0.7   0.4   3.8   0.3
 2. 2001:1970:4000:82::1                    0.0%    94    9.0  20.2   7.3 889.2  91.0
 3. 2001:1970:0:1a7::1                     39.4%    94   19.8  19.5  17.9  26.3   1.8
 4. 2001:1970:0:61::1                      45.2%    93   18.1  16.5  14.3  22.5   1.9
 5. ae7.pr03.yyz1.tfbnw.net                 0.0%    93   19.6  19.4  14.9  76.8   9.4
 6. po103.psw04.yyz1.tfbnw.net              0.0%    93   14.5  15.8  13.9  24.0   1.5
 7. po4.msw1ab.01.yyz1.tfbnw.net            0.0%    93   15.3  15.7  14.2  24.0   1.3
 8. 2a03:2880:f00e:a:face:b00c:0:1          0.0%    93   19.2  15.5  13.7  22.5   1.7

And even just a few minutes ago it was not as I was testing it for
another (off-list) query:

                                My traceroute  [v0.92]
pc.interlinx.bc.ca (2001:1970:5261:d600:c5d9:3319:afbc:3bb6) 2018-12-20T22:47:51-0500
Keys:  Help   Display mode   Restart statistics   Order of fields   quit
                                             Packets               Pings
 Host                                      Loss%   Snt   Last   Avg  Best  Wrst StDev
 1. 2001:1970:5261:d600::1                  0.0%   112    0.6   0.7   0.5   5.1   0.4
 2. 2001:1970:4000:82::1                    0.0%   112    9.2  15.8   7.3 374.4  36.2
 3. 2001:1970:0:1a7::1                     17.0%   112   18.3  19.1  17.6  21.9   0.8
 4. 2001:1970:0:61::1                      33.0%   112   15.9  16.0  14.8  27.9   1.8
 5. 2001:1978:1300::1                       0.0%   112   15.5  17.0  14.1  49.8   4.4
 6. 2001:1978:203::45                       0.0%   112   29.5  29.8  28.2  46.8   2.1
 7. ???

Perhaps the bit of cage rattling that I have done here has knocked
something loose.  :-)

Cheers,
b.

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