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Nico Schottelius, 03/11/2021 05:57 PM

Commonly used IPv6 networks

By ungleich

Assuming that you have a /48 per location/site, there are some specific /64 sub networks that we usually use at ungleich.
As an example let's take 2001:db8:a::/48, then the we often use these networks:

Network Description
2001:db8:a::/64 The network 0 is usually internal
For netboot, untrusted equipment, IPMI and co. Usually firewall for no incoming traffic at all
2001:db8:a:1::/64 Servers, sensible equipment: stuff we trust ssh is safe
For accessing servers, usually only port 22 (ssh) or an alternative SSH port (222,2202,2222) open
2001:db8:a:8::/64 Transfer network
For routing, might contain /124 or smaller sub networks for "point to point"
2001:db8:a:a::/64 DNS network: houses DNS servers in the network.
Regular DNS servers are usually 2001:db8:a:a::a and 2001:db8:a:a::b
DNS64 enabled servers are usually 2001:db8:a:a::64 and 2001:db8:a:a::65
2001:db8:a:bee::/64 LAN network: usually wifi/coworking
"bee" is something people can easily pronounce; ssh open from outside
2001:db8:a:cafe::/64 LAN network: usually wired/regular clients
2001:db8:a:d::/64 Downstream network: routing to physically present downstreams
2001:db8:a:d::/80 Static IP addresses OUR side
2001:db8:a:d:1::/80 Static IP addresses DOWNSTREAM
2001:db8:a:7ea::/64 LAN network: Usually 2nd wifi network
2001:db8:a:b00::/96 Incoming NAT64 prefix: mapping IPv4 islands: 2001:db8:a:b00:: is IPv6 reachable
2001:db8:a:c001::/96 Outgoing NAT64 prefix: mapping the IPv4 Internet, allowing IPv6 only hosts to reach the IPv4 Internet

In other places

Updated by Nico Schottelius 11 months ago · 10 revisions