Added IPv6 notes

.gitignore

@@ -1,2 +1,3 @@
 .cache/
+.mypy_cache/
 site/

README.md

@@ -29,7 +29,7 @@ poetry run mkdocs build
 
 ## Copyright
 
-Copyright (c) 2023 Andrew LeCody
+Copyright (c) 2022-2024 Andrew LeCody
 
 This work is licensed under a Creative Commons Attribution 4.0 International License.
 

content/guides/ipv6.md

@@ -0,0 +1,37 @@
+---
+status: new
+description: Useful notes for using and planning for IPv6.
+hide:
+    - toc
+---
+
+# IPv6
+
+- Subnets should always be /64s
+- Use [SLAAC](https://en.wikipedia.org/wiki/IPv6#Stateless_address_autoconfiguration_(SLAAC)) whenever possible, avoid DHCP
+- Using nibble-aligned (4 bit) prefixes makes things easier
+- `fe80::/10` are [link-local addresses](https://en.wikipedia.org/wiki/Link-local_address)
+    - Gross, it's NOT nibble-aligned, which means this range is `fe80::` to `febf::`. So anything that starts with `fe8`, `fe9`, `fea` and `feb`.
+- [DHCPv6 prefix delegation](https://en.wikipedia.org/wiki/Prefix_delegation) is a common way ISPs hand out IPv6 ranges.
+
+## How Many /64s
+
+| Prefix | /64s   | Subnet Bits |
+| ------ | ------ | ----------- |
+| /48    | 65,536 | 16          |
+| /49    | 32,768 | 15          |
+| /50    | 16,384 | 14          |
+| /51    | 8,192  | 13          |
+| /52    | 4,096  | 12          |
+| /53    | 2,048  | 11          |
+| /54    | 1,024  | 10          |
+| /55    | 512    | 9           |
+| /56    | 256    | 8           |
+| /57    | 128    | 7           |
+| /58    | 64     | 6           |
+| /59    | 32     | 5           |
+| /60    | 16     | 4           |
+| /61    | 8      | 3           |
+| /62    | 4      | 2           |
+| /63    | 2      | 1           |
+| /64    | 1      | 0           |

content/guides/zfs-notes.md

@@ -1,5 +1,4 @@
 ---
-status: new
 description: Various notes about my usage of ZFS/OpenZFS.
 ---
 

content/stylesheets/ipv6.css

@@ -0,0 +1,37 @@
+/* If it's stupid and it works... */
+#how-many-64s + .md-typeset__scrollwrap > .md-typeset__table > table:nth-child(1) > tbody:nth-child(2) {
+  tr:nth-child(1) {
+    background-color: #448aff1a;
+    td {
+      font-weight: bold;
+    }
+  }
+
+  tr:nth-child(5) {
+    background-color: #00b8d41a;
+    td {
+      font-weight: bold;
+    }
+  }
+
+  tr:nth-child(9) {
+    background-color: #00bfa51a;
+    td {
+      font-weight: bold;
+    }
+  }
+
+  tr:nth-child(13) {
+    background-color: #64dd171a;
+    td {
+      font-weight: bold;
+    }
+  }
+
+  tr:nth-child(17) {
+    background-color: #ff91001a;
+    td {
+      font-weight: bold;
+    }
+  }
+}

mkdocs.yml

@@ -10,6 +10,7 @@ nav:
       - guides/mkdocs-material-insider-github-pages-action.md
       - guides/http-status-codes.md
       - guides/zfs-notes.md
+      - guides/ipv6.md
   - Smart Home:
       - smart-home/architecture.md
       - smart-home/garage-door.md
@@ -104,3 +105,5 @@ theme:
       toggle:
         icon: material/brightness-4
         name: Switch to system preference
+extra_css:
+  - stylesheets/ipv6.css

pyproject.toml

@@ -14,7 +14,6 @@ Pillow = "^10.1.0"
 CairoSVG = "^2.7.0"
 pngquant = "^1.0.7"
 
-
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"