diff --git a/Index.md b/Index.md
index e6b7e17..f0ccefb 100644
--- a/Index.md
+++ b/Index.md
@@ -1,67 +1,102 @@
 # book6 Main Index
-This index was created automatically, so it's dumb. It has links to each section that mentions each keyword.
+This index was created automatically, so it's dumb. It is not case-sensitive. It has links to each section that mentions each keyword.
 <!-- Link lines generated automatically; do not delete -->
 [address](./1.%20Introduction%20and%20Foreword/How%20a%20user%20sees%20IPv6.md)
-[address](./1.%20Introduction%20and%20Foreword/How%20an%20application%20programmer%20sees%20IPv6.md)
-[address](./2.%20IPv6%20Basic%20Technology/2.%20IPv6%20Basic%20Technology.md)
-[address](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
-[address](./2.%20IPv6%20Basic%20Technology/Addresses.md)
-[address](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
-[address](./2.%20IPv6%20Basic%20Technology/DNS.md)
-[address](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
-[address](./2.%20IPv6%20Basic%20Technology/Managed%20configuration.md)
-[address](./2.%20IPv6%20Basic%20Technology/Packet%20Format.md)
-[address](./2.%20IPv6%20Basic%20Technology/Routing.md)
-[address](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
-[address](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
-[address](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
-[address](./3.%20Coexistence%20with%20Legacy%20IPv4/Obsolete%20techniques.md)
-[address](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
-[address](./4.%20Security/4.%20Security.md)
-[address](./4.%20Security/Filtering.md)
-[address](./4.%20Security/Layer%202%20considerations.md)
-[address](./5.%20Deployment/Deployment%20by%20carriers.md)
-[address](./5.%20Deployment/Deployment%20in%20the%20enterprise.md)
-[address](./99.%20Chapter%20Template/Markdown%20Usage.md)
+[●](./1.%20Introduction%20and%20Foreword/How%20an%20application%20programmer%20sees%20IPv6.md)
+[●](./2.%20IPv6%20Basic%20Technology/2.%20IPv6%20Basic%20Technology.md)
+[●](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
+[●](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/DNS.md)
+[●](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
+[●](./2.%20IPv6%20Basic%20Technology/Managed%20configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/Packet%20Format.md)
+[●](./2.%20IPv6%20Basic%20Technology/Routing.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Obsolete%20techniques.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+[●](./4.%20Security/4.%20Security.md)
+[●](./4.%20Security/Filtering.md)
+[●](./4.%20Security/Layer%202%20considerations.md)
+[●](./5.%20Deployment/Deployment%20by%20carriers.md)
+[●](./5.%20Deployment/Deployment%20in%20the%20enterprise.md)
+[●](./99.%20Chapter%20Template/Markdown%20Usage.md)
 
 [anycast](./2.%20IPv6%20Basic%20Technology/Addresses.md)
 
+[bgp](./2.%20IPv6%20Basic%20Technology/Routing.md)
+[●](./4.%20Security/Filtering.md)
+[●](./8.%20Further%20Reading/8.%20Further%20Reading.md)
+
+[coexistence](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Obsolete%20techniques.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Tunnels.md)
+
 [dual stack](./2.%20IPv6%20Basic%20Technology/Transport%20protocols.md)
-[dual stack](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
-[dual stack](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
-[dual stack](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+
+[iid](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+
+[ipv4](./1.%20Introduction%20and%20Foreword/How%20a%20network%20operations%20center%20sees%20IPv6.md)
+[●](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
+[●](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./2.%20IPv6%20Basic%20Technology/DNS.md)
+[●](./2.%20IPv6%20Basic%20Technology/Extension%20headers%20and%20options.md)
+[●](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
+[●](./2.%20IPv6%20Basic%20Technology/Managed%20configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/Routing.md)
+[●](./2.%20IPv6%20Basic%20Technology/Traffic%20class%20and%20flow%20label.md)
+[●](./2.%20IPv6%20Basic%20Technology/Transport%20protocols.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Obsolete%20techniques.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Tunnels.md)
+[●](./4.%20Security/4.%20Security.md)
+[●](./4.%20Security/Filtering.md)
+[●](./4.%20Security/Layer%202%20considerations.md)
+[●](./5.%20Deployment/Deployment%20by%20carriers.md)
+[●](./8.%20Further%20Reading/8.%20Further%20Reading.md)
 
 [link-local](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
-[link-local](./2.%20IPv6%20Basic%20Technology/Addresses.md)
-[link-local](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
 
 [multicast](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
-[multicast](./2.%20IPv6%20Basic%20Technology/Addresses.md)
-[multicast](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
-[multicast](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
-[multicast](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
-[multicast](./4.%20Security/Filtering.md)
-[multicast](./4.%20Security/Layer%202%20considerations.md)
+[●](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
+[●](./4.%20Security/Filtering.md)
+[●](./4.%20Security/Layer%202%20considerations.md)
 
 [route](./2.%20IPv6%20Basic%20Technology/2.%20IPv6%20Basic%20Technology.md)
-[route](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
-[route](./2.%20IPv6%20Basic%20Technology/Addresses.md)
-[route](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
-[route](./2.%20IPv6%20Basic%20Technology/DNS.md)
-[route](./2.%20IPv6%20Basic%20Technology/Extension%20headers%20and%20options.md)
-[route](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
-[route](./2.%20IPv6%20Basic%20Technology/Managed%20configuration.md)
-[route](./2.%20IPv6%20Basic%20Technology/Packet%20Format.md)
-[route](./2.%20IPv6%20Basic%20Technology/Routing.md)
-[route](./2.%20IPv6%20Basic%20Technology/Traffic%20class%20and%20flow%20label.md)
-[route](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
-[route](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
-[route](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
-[route](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
-[route](./3.%20Coexistence%20with%20Legacy%20IPv4/Tunnels.md)
-[route](./4.%20Security/Filtering.md)
-[route](./4.%20Security/Layer%202%20considerations.md)
-[route](./5.%20Deployment/Deployment%20by%20carriers.md)
-[route](./5.%20Deployment/Deployment%20in%20the%20enterprise.md)
-[route](./8.%20Further%20Reading/8.%20Further%20Reading.md)
+[●](./2.%20IPv6%20Basic%20Technology/Address%20resolution.md)
+[●](./2.%20IPv6%20Basic%20Technology/Addresses.md)
+[●](./2.%20IPv6%20Basic%20Technology/Auto-configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/DNS.md)
+[●](./2.%20IPv6%20Basic%20Technology/Extension%20headers%20and%20options.md)
+[●](./2.%20IPv6%20Basic%20Technology/Layer%202%20functions.md)
+[●](./2.%20IPv6%20Basic%20Technology/Managed%20configuration.md)
+[●](./2.%20IPv6%20Basic%20Technology/Packet%20Format.md)
+[●](./2.%20IPv6%20Basic%20Technology/Routing.md)
+[●](./2.%20IPv6%20Basic%20Technology/Traffic%20class%20and%20flow%20label.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/3.%20Coexistence%20with%20Legacy%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Dual%20stacks.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/IPv6%20primary%20differences%20from%20IPv4.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Translation.md)
+[●](./3.%20Coexistence%20with%20Legacy%20IPv4/Tunnels.md)
+[●](./4.%20Security/Filtering.md)
+[●](./4.%20Security/Layer%202%20considerations.md)
+[●](./5.%20Deployment/Deployment%20by%20carriers.md)
+[●](./5.%20Deployment/Deployment%20in%20the%20enterprise.md)
+[●](./8.%20Further%20Reading/8.%20Further%20Reading.md)