diff --git a/modules/router/default.nix b/modules/router/default.nix
index b6b7d7d..dbf064e 100644
--- a/modules/router/default.nix
+++ b/modules/router/default.nix
@@ -85,8 +85,16 @@ in
           "2001:db8:20::1/64"
         ];
         networkConfig = {
+          IPv6SendRA = true;
           ConfigureWithoutCarrier = true;
         };
+        ipv6Prefixes = [{
+          Prefix = "2001:db8:20::/64";
+        }];
+        ipv6SendRAConfig = {
+          EmitDNS = true;
+          DNS = "2001:db8:20::1";
+        };
         linkConfig.RequiredForOnline = "no";
       };
       "50-${devices}" = {
@@ -98,7 +106,16 @@ in
           "192.168.30.1/24"
           "2001:db8:30::1/64"
         ];
-        networkConfig = { };
+        networkConfig = {
+          IPv6SendRA = true;
+        };
+        ipv6Prefixes = [{
+          Prefix = "2001:db8:30::/64";
+        }];
+        ipv6SendRAConfig = {
+          EmitDNS = true;
+          DNS = "2001:db8:30::1";
+        };
         linkConfig.RequiredForOnline = "routable";
       };
       "50-${wifi}" = {
@@ -110,7 +127,16 @@ in
           "192.168.40.1/24"
           "2001:db8:40::1/64"
         ];
-        networkConfig = { };
+        networkConfig = {
+          IPv6SendRA = true;
+        };
+        ipv6Prefixes = [{
+          Prefix = "2001:db8:40::/64";
+        }];
+        ipv6SendRAConfig = {
+          EmitDNS = true;
+          DNS = "2001:db8:40::1";
+        };
         linkConfig.RequiredForOnline = "routable";
       };
     };
@@ -319,13 +345,13 @@ in
       dhcp-range = [
         # format TAG,START,END,?MASK,?options,LEASE
         "${bridge},192.168.20.50,192.168.20.90,24h"
-        "${bridge},2001:db8:20::ffff,2001:db8:20::ffff:ffff:ffff:ffff,24h"
+        "${bridge},::ffff,constructor:${bridge},ra-names,64,24h"
 
         "${devices},192.168.30.10,192.168.30.240,24h"
-        "${devices},2001:db8:30::10,2001:db8:30::ffff:ffff:ffff:ffff,24h"
+        "${devices},::10,constructor:${devices},ra-names,64,24h"
 
         "${wifi},192.168.40.10,192.168.40.240,24h"
-        "${wifi},2001:db8:40::10,2001:db8:40::ffff:ffff:ffff:ffff,24h"
+        "${wifi},::10,constructor:${wifi},ra-names,64,24h"
       ];
       interface = [ bridge devices wifi ];
       dhcp-option = [