diff --git a/files/interfaces-troisdorf5 b/files/interfaces-troisdorf5
index 858c737..37a0421 100644
--- a/files/interfaces-troisdorf5
+++ b/files/interfaces-troisdorf5
@@ -15,11 +15,11 @@ iface lo inet6 loopback
 # The primary network interface
 allow-hotplug eth0
 iface eth0 inet dhcp
-
-iface eth0 inet6 static
-        address 2a01:4f8:c17:173b::2
+allow-hotplug eth1
+iface eth1 inet6 static
+        address 2a01:4f8:161:62a9::5
         netmask 64
-        gateway fe80::1
+        gateway 2a01:4f8:161:62a9::2
 
 # GRE Tunnel zum Rheinland Backbone
 # - Die Konfigurationsdaten werden vom Rheinland Backbone vergeben und zugewiesen
@@ -29,7 +29,7 @@ auto gre-bb-a.ak.ber
 iface gre-bb-a.ak.ber inet static
         address 100.64.2.151
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 172.31.1.100 remote 185.66.195.0 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 5.9.76.198 remote 185.66.195.0 ttl 255
         post-up ip link set $IFACE mtu 1400
         post-down ip tunnel del $IFACE
 
@@ -42,7 +42,7 @@ auto gre-bb-b.ak.ber
 iface gre-bb-b.ak.ber inet static
         address 100.64.2.153
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 172.31.1.100 remote 185.66.195.1 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 5.9.76.198 remote 185.66.195.1 ttl 255
         post-up ip link set $IFACE mtu 1400
         post-down ip tunnel del $IFACE
 
@@ -56,7 +56,7 @@ auto gre-bb-a.ix.dus
 iface gre-bb-a.ix.dus inet static
         address 100.64.2.155
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 172.31.1.100 remote 185.66.193.0 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 5.9.76.198 remote 185.66.193.0 ttl 255
         post-up ip link set $IFACE mtu 1400
         post-down ip tunnel del $IFACE
 
@@ -70,11 +70,10 @@ auto gre-bb-b.ix.dus
 iface gre-bb-b.ix.dus inet static
         address 100.64.2.157
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 172.31.1.100 remote 185.66.193.1 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 5.9.76.198 remote 185.66.193.1 ttl 255
         post-up ip link set $IFACE mtu 1400
         post-down ip tunnel del $IFACE
 
 iface gre-bb-b.ix.dus inet6 static
         address 2a03:2260:0:158::2/64
         netmask 64
-