added notes

README.md

@@ -40,7 +40,7 @@ A few files must be copied to the initramfs in order to make this work. First we
 
 In `/etc/initramfs-tools/hooks/` create an executable script with the name of your choice. Here's the content:
 
-````
+```
 #!/bin/bash
 . /usr/share/initramfs-tools/hook-functions
 
@@ -78,9 +78,80 @@ do
         exit 1;
     fi
 done
-````
+```
 
 After that you'll need to `update-initramfs -u`
 
 # Boot
 **Boot and it should just work! Happy IPv6!**
+
+# Final notes
+
+## iPXE & NFS
+
+Due to incompatible limiting requirements of iPXE and initramfs, both must be run on separate subnets. You will need one interface for iPXE and one for NFS.
+
+### radvd.conf
+```
+# iPXE needs SLAAC and DHCPv6 options
+interface bridge0 {
+    IgnoreIfMissing on;
+    AdvSendAdvert on;
+    AdvOtherConfigFlag on;
+    AdvDefaultLifetime 0;
+    AdvLinkMTU 9000;
+    AdvCurHopLimit 64;
+    AdvReachableTime 0;
+    MaxRtrAdvInterval 600;
+    MinRtrAdvInterval 198;
+    AdvDefaultPreference low;
+    AdvRetransTimer 0;
+    AdvManagedFlag off;
+    prefix <your PXE /64>::/64 { };
+    RDNSS <your dnsmasq server (yourself) IP, must be in the same subnet>:: { };
+};
+
+# busybox/initramfs needs DHCPv6
+interface bridge2 {
+    IgnoreIfMissing on;
+    AdvSendAdvert on;
+    AdvOtherConfigFlag off;
+    AdvDefaultLifetime 0;
+    AdvLinkMTU 9000;
+    AdvCurHopLimit 64;
+    AdvReachableTime 0;
+    MaxRtrAdvInterval 600;
+    MinRtrAdvInterval 198;
+    AdvDefaultPreference low;
+    AdvRetransTimer 0;
+    AdvManagedFlag off;
+    prefix <your NFS /64>::/64 {
+        AdvAutonomous off;
+    };
+};
+```
+### isc-dhcp-server6 dhcpd6.conf
+```
+# PXE
+subnet6 <your PXE /64>::/64 {
+	option dhcp6.bootfile-url "http://<pxe server hostname>?uuid=${uuid}&op=ipxe";
+}
+# NFS
+subnet6 <your NFS /64>::/64 {
+	range6 <your NFS /64>::1 <your NFS /64>::ffff;
+	option dhcp6.name-servers <your NFS server>::;
+}
+```
+
+### dnsmasq
+```
+# leave everything to defaults except
+interface=bridge1
+interface=bridge2
+no-dhcp-interface=bridge1
+no-dhcp-interface=bridge2
+```
+
+### /etc/hosts
+DO NOT MAKE YOUR VMs depend on VMs to boot !!!
+If your DNS server is a VM, make sure that the hostnames used to boot (pxe server hostname, nfs server hostname) can be resolved by dnsmasq, the easiest way to ensure this is to add them to /etc/hosts which dnsmasq will use by default.