Seems like an odd waste of resources; what if Google, Akamai, Netflix, and anyone else who wanted caches wanted IPs in that block? The IX would be out of address space pretty quickly, forcing a majority of users to re-number because of a small number of other users. -Dave On Thu, Mar 12, 2015 at 1:07 PM, Steven Schecter <schecter@gmail.com> wrote:
Those IPs appear to be used by to Google cache servers at the QIX. It's common for CDNs to utilize provider space and not maintain their own layer-3. E.g. cache servers connected to switch, connected to provider, without the requirement of a router.
/Steve
On Thu, Mar 12, 2015 at 3:58 PM, Jason Lixfeld <jason@lixfeld.ca> wrote:
So today, I saw this:
BlackBox:~ jlixfeld$ host google.ca 8.8.8.8 Using domain server: Name: 8.8.8.8 Address: 8.8.8.8#53 Aliases:
google.ca has address 206.126.112.166 google.ca has address 206.126.112.177 google.ca has address 206.126.112.172 google.ca has address 206.126.112.187 google.ca has address 206.126.112.151 google.ca has address 206.126.112.158 google.ca has address 206.126.112.157 google.ca has address 206.126.112.173 google.ca has address 206.126.112.181 google.ca has address 206.126.112.155 google.ca has address 206.126.112.147 google.ca has address 206.126.112.185 google.ca has address 206.126.112.143 google.ca has address 206.126.112.170 google.ca has address 206.126.112.162 google.ca has IPv6 address 2607:f8b0:4006:808::100f google.ca mail is handled by 50 alt4.aspmx.l.google.com. google.ca mail is handled by 30 alt2.aspmx.l.google.com. google.ca mail is handled by 20 alt1.aspmx.l.google.com. google.ca mail is handled by 10 aspmx.l.google.com. google.ca mail is handled by 40 alt3.aspmx.l.google.com. BlackBox:~ jlixfeld$
That is not Google IPv4 address space, and those IPv4 IPs are not being announced by 15169.
Am I dumb in thinking that this is weird or is this sort of thing commonplace?
-- Steven J. Schecter (m) 917.676.1646