Differences

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--- networking:ipv6 [2022/11/19 09:20] – [Prefix] oscar
+++ networking:ipv6 [2022/11/19 10:35] (current) – [Default Route] oscar
@@ Line 74: / Line 74: @@
   - DHCPv6 - Dynamic host configuration protocol (assigned by central server)
-===== Network Discovery =====
+{{ :networking:slaac-dhcpv6.png?400 |}}
+==== SLAAC ====
+Stateless Auto Address Configuration (SLAAC) enables hosts to create their own unique IPv6 global unicast address without the services of a DHCPv6 server that maintains network address information to know which IPv6 addresses are being used and which ones are available.
+  * SLAAC router sends periodic ICMPv6 RA **Router Advertisement** messages (i.e., every 200 seconds) providing addressing and other configuration information for hosts to auto configure their IPv6 address based on the information in the RA.
+  * SLAAC host configures it address using the **Router Advertisement** (RA) messages send by the router
+  * A host can also send a **Router Solicitation** (RS) message requesting an RA.
+  * SLAAC can be deployed as SLAAC only, or SLAAC with DHCPv6
+==== DHCPv6 ====
+Stateful DHCPv6 does not require SLAAC while stateless DHCPv6 does. Regardless, when an RA indicates to use DHCPv6 or stateful DHCPv6:
+  - The host sends an RS message.
+  - The router responds with an RA message.
+  - The host sends a DHCPv6 SOLICIT message.
+  - The DHCPv6 server responds with an ADVERTISE message.
+  - The host responds to the DHCPv6 server.
+  - The DHCPv6 server sends a REPLY message.
+=== Stateless DHCPv6 Operation ===
+If an RA indicates the stateless DHCPv6 method:
+  * the host uses the information in the RA message for addressing and contacts a DHCPv6 server for additional information.
+  * Note: The DHCPv6 server only provides configuration parameters for clients and does not maintain a list of IPv6 address bindings (i.e. stateless).
+=== Statefull DHCPv6 Operation ===
+If an RA indicates the statefull DHCPv6 method:
+  * the host contacts a DHCPv6 server for all configuration information.
+  * Note: The DHCPv6 server is statefull and maintains a list of IPv6 address bindings
+===== Troubleshooting =====
+==== Show address ====
+  ip -6 address show
+==== Default Route ====
+  ip -6 route show | grep default
+==== Ping the host ====
+ping6 fe80::ee08:6bff:fe84:2043
+==== Network Discovery ====
 <code>
 ip -6 neigh show
@@ Line 96: / Line 128: @@
 ping6 -c3 -n -I <your network interface fda1 ip> ff02::1     --> lists all local network addresses
 </code>
+===== IPv6 addresses in URIs/URLs =====
+Because IPv6 address notation uses colons to separate hextets, it is necessary to encase the address in square brackets in URIs. For example http://[2a00:1450:4001:82a::2004]. If you want to specify a port, you can do so as normal using a colon: http://[2a00:1450:4001:82a::2004]:80.