From ec997ed81c280ff7d142594ebf0129fa3225b577 Mon Sep 17 00:00:00 2001
From: Paul Warren <pwarren@pwarren.id.au>
Date: Mon, 20 Dec 2021 07:13:39 +1100
Subject: [PATCH] tagging, basic routing

---
 index.html | 51 +++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 39 insertions(+), 12 deletions(-)

diff --git a/index.html b/index.html
index 881209c..6ecc400 100644
--- a/index.html
+++ b/index.html
@@ -96,7 +96,8 @@
 	  <p class="fragment">Ethernet layer</p>
 	  <p class="fragment">Designed to limit broadcast storms</p>
 	  <p class="fragment">Can also separate IP networks on the same Ethernet</p>
-	  <p class="fragment">Tagged and Untagged or Default</p>
+	  <p class="fragment">Tagged and Untagged/Default</p>
+	  <p class="fragment">IEEE 802.1Q</p>
 	  <aside class="notes">
 	    <p>beware of strange implementations, windows seems to take Router Advertisements from all vlans, regardless of tag</p>
 	</section>
@@ -106,14 +107,24 @@
 	    ip link add link enp0s2 name enp0s2.2501 vlan id 2501
 	    ip -6 addr add 2001:db8:2501::10/64 dev enp0s2.2501
 	    ip link set dev enp0s2.2501 up
+	    </code>
 	  </pre>
 	</section>
 
 	<section><h2>VLANs in linux</h2>
 	  <p>Various different methods of making it go in different distributions</p>
+	  <p class="fragment">Debian: in /etc/network/interfaces</p>
 	  <pre class="fragment"><code data-trim data-noescape>
+	      auto enp1s0.2502
+	      iface enp1s0.2502 inet dhcp
+	      iface enp1s0.2502 inet6 auto
+	    </code>
+	  </pre>
+	  <p class="fragment">OpenWRT has a nice GUI</p>
 
-
+	  <aside class="notes">
+	    <p>OpenWRT: can also use the hardware present on most hardware routers to assign vlans to specific ports</p>
+	</section>
 	
 	<section><h2>What even is a router?</h2>
 	  <p class="fragment">Two or more interfaces</p>
@@ -121,19 +132,20 @@
 	  <aside class="notes">
 	    <p>Not necessarily physical</p>
 	    <p>Sounds simple right?</p>
+	  </aside>
 	</section>
 	
 	<section><h2>Linux Routing</h2>
 	  <pre class="fragment"><code data-trim data-noescape>
-net.ipv4.ip_forward = 1
-net.ipv6.conf.all.forwarding = 1
-net.ipv6.conf.default.forwarding = 1
+	      net.ipv4.ip_forward = 1
+	      net.ipv6.conf.all.forwarding = 1
+	      net.ipv6.conf.default.forwarding = 1
 	    </code>
 	  </pre>
 	  <p class="fragment">And we're done!</p>
 	  <p class="fragment">Yeah, not really :)</p>
-	  </section>
-
+	</section>
+	
 	<section><h2>Static Routes!</h2>
 	  <p>Manually added, or scripted routes that don't change</p>
 	  <pre><code data-trim data-noescape>
@@ -141,7 +153,24 @@ net.ipv6.conf.default.forwarding = 1
 	    </code>
 	  </pre>
 	</section>
+	
+	<section><h2>Static Routes!</h2>
+	  <p>Harking back to our vlan</p>
+	  <pre><code data-trim data-noescape>
+	      ip -6 route add 2001:db8:2501::/64 via 2001:db8:2500::1 dev enp0s1
+	    </code>
+	  </pre>
+	  <aside class="notes">
+	    <p>As you can imagine this quickly becomes unwieldy with expanding networks</p>
+	  </aside>
+	</section>
 
+	<section><h2>Enter dynamic routes</h2>
+	  <p>Discovering routes to other networks</p>
+	  <p>Add them to the kernel routing table</p>
+	  <p>OSPF: RFC5430, RFC2328</p>
+	</section>				   
+	
 	<section><h2>What I'm assuming we're familiar with</h2>
 	  <p>Diagram showing standard leaf node of a network with a bit cloud containg "The rest of the org"</p>
 	</section>
@@ -187,18 +216,16 @@ net.ipv6.conf.default.forwarding = 1
 	<section><h2>Bonus homework</h2>
 	  <p>Why did I use 2001::db8::/32?</p>
 	  <p>Why did I use /64s?</p>
-	  <p>something ansible?</p>
-	  <p>DSA is relatively new, nicer way if interacting with actual switch hardware</p>
+	  <p>I highly recommend going through KNorrie's network examples: <a href="https://github.com/knorrie/network-examples">https://github.com/knorrie/network-examples</a></p>
 	</section>
 	
 	<section><h2>Resources</h2>
 	  <p>These slides: <a href="https://gitea.pwarren.id.au/pwarren/SysAdmin2022">https://gitea.pwarren.id.au/pwarren/SysAdmin2022</a></p>
 	  <p>bird: <a href="https://bird.network.cz/">https://bird.network.cz</a></p>
-	  <p>KNorrie's network examples: <a href="https://github.com/knorrie/network-examples">https://github.com/knorrie/network-examples</a></p>
 	  <p>Openwrt: <a href="https://openwrt.org">https://openwrt.org/</a></p>
 	  <p>The OpenWRT IRC channel, currently on the OFTC network</p>
-	  <p>BenEater's <a href="https://www.youtube.com/watch?v=-wMU8vmfaYo">"Why was facebook down for five hours" </a>
-	  </p>
+	  <p>BenEater's <a href="https://www.youtube.com/watch?v=-wMU8vmfaYo">"Why was facebook down for five hours" </a></p>
+	  <p>802.1Q: <a href="https://www.ieee802.org/1/pages/802.1Q-2014.html" /></p>
 	</section>
       </div>
     </div>