diff --git a/routes.txt b/routes.txt
index a63717e..95325b9 100644
--- a/routes.txt
+++ b/routes.txt
@@ -1,4 +1,8 @@
 # Point to Point Tunnels
+# Upstream's IP is Network ID + 1, Downstream's is Network ID + 2
+# Bidirection arrow means they both isn't behind NAT
+
+# Network ID		Upstream	     Downstream
 10.127.0.0/30		caasih		<--> ucbvax
 10.127.0.4/30		caasih		 --> NeoPortable
 10.127.0.8/30		ucbvax		 --> NeoPortable
@@ -6,8 +10,8 @@
 10.127.0.16/30		caasih		 --> NeoPDP-11
 10.127.0.20/30		NeoPortable	<--> NeoVAX
 10.127.0.24/30		NeoPDP-11	 --> NeoPortable
-10.127.0.28/30		fionaLHS 	<--  ucbvax
-10.127.0.32/30		ncuiqh		<--> caasih
+10.127.0.28/30		ucbvax		 --> fionaLHS
+10.127.0.32/30		caasih		 --> ncuiqh
 
 # Continuous Subnet
 10.127.1.0/24		CROOM