diff --git a/ops/nixos/blade-paris/default.nix b/ops/nixos/blade-paris/default.nix
index 2e19e0c050..082f9ea0e3 100644
--- a/ops/nixos/blade-paris/default.nix
+++ b/ops/nixos/blade-paris/default.nix
@@ -5,14 +5,6 @@
 { depot, lib, pkgs, rebuilder, config, ... }:
 let
   inherit (depot.ops) secrets;
-
-  internetAddresses = {
-    v4 = { local = "195.74.55.23"; remote = "195.74.55.22"; };
-    v6 = {
-      local = "2a03:ee40:8080:9:2::2";
-      remote = "2a03:ee40:8080:9:2::1";
-    };
-  };
 in {
   imports = [
     ../lib/blade.nix
@@ -21,53 +13,10 @@ in {
 
   boot.loader.grub.device = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0101da58c052a35c497ff39f7bd33f46a018bf2f2cd4503e52a89df5e552da8d661f000000000000000000005e0619e7ff90240091558107b6a8e58d-0:0";
 
-  services.lukegbgp = {
-    enable = true;
-    config = {
-      local.routerID = internetAddresses.v4.local;
-      peering.veloxserv = {
-        local = {
-          asn = 205479;
-          v4 = internetAddresses.v4.local;
-          v6 = internetAddresses.v6.local;
-        };
-        remote = {
-          asn = 3170;
-          export_community = 4001;
-          routers = [{ v4 = internetAddresses.v4.remote; v6 = internetAddresses.v6.remote; }];
-        };
-      };
-      export.v4 = [ "92.118.28.0/24" ];
-      export.v6 = [ "2a09:a441::/32" ];
-    };
-  };
-
   # Networking!
   networking = {
     hostName = "blade-paris";
     hostId = "41b2a198";
-    interfaces.br-public.ipv4.addresses = [{
-      address = "92.118.28.254";
-      prefixLength = 24;
-    }];
-    interfaces.br-public.ipv6.addresses = [{
-      address = "2a09:a441::ffff";
-      prefixLength = 48;
-    }];
-    interfaces.en-internet.ipv4.addresses = [{
-      address = internetAddresses.v4.local;
-      prefixLength = 31;
-    }];
-    interfaces.en-internet.ipv6.addresses = [{
-      address = internetAddresses.v6.local;
-      prefixLength = 126;
-    }];
-    defaultGateway = internetAddresses.v4.remote;
-    defaultGateway6 = internetAddresses.v6.remote;
-    firewall.extraCommands = ''
-      iptables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
-      ip6tables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
-    '';
   };
   my.ip.tailscale = "100.117.185.118";
   my.blade.bay = 2;
@@ -86,46 +35,20 @@ in {
     };
   };
 
-  services.keepalived = let
-    mgmtBase = {
-      interface = "br-mgmt";
-      state = "MASTER";
-      priority = 100;
-    };
-  in {
-    enable = true;
-    vrrpInstances.mgmtGateway = mgmtBase // {
-      virtualIps = [
-        { addr = "10.100.0.1/23"; }
-        { addr = "92.118.28.1/24"; dev = "br-public"; }
-      ];
-      virtualRouterId = 1;
-    };
-    vrrpInstances.mgmtGateway6 = mgmtBase // {
-      virtualIps = [
-        { addr = "fe80::f00f/64"; dev = "br-public"; }
-        { addr = "2a09:a441::/48"; dev = "br-public"; }
-      ];
-      virtualRouterId = 2;
-    };
-  };
-
-  services.radvd = {
-    enable = true;
-    config = ''
-      interface br-public {
-        AdvSendAdvert on;
-        MinRtrAdvInterval 30;
-        MaxRtrAdvInterval 100;
-        AdvRASrcAddress {
-          fe80::f00f;
-        };
-        prefix 2a09:a441:ffff:ffff::/64 {
-          AdvOnLink on;
-          AdvAutonomous on;
-          AdvRouterAddr off;
-        };
+  my.blade-router = {
+    addresses.linknet = {
+      v4 = { local = "195.74.55.23"; remote = "195.74.55.22"; };
+      v6 = {
+        local = "2a03:ee40:8080:9:2::2";
+        remote = "2a03:ee40:8080:9:2::1";
       };
-    '';
+    };
+
+    addresses.br-public = {
+      v4.addr = "92.118.28.253";
+      v6.addr = "2a09:a441::fffe";
+    };
+
+    vrrp.priority = 50;
   };
 }
diff --git a/ops/nixos/blade-tuvok/default.nix b/ops/nixos/blade-tuvok/default.nix
index 5b47e4a44b..374a9bd18f 100644
--- a/ops/nixos/blade-tuvok/default.nix
+++ b/ops/nixos/blade-tuvok/default.nix
@@ -5,71 +5,20 @@
 { depot, lib, pkgs, rebuilder, config, ... }:
 let
   inherit (depot.ops) secrets;
-
-  internetAddresses = {
-    v4 = { local = "195.74.55.21"; remote = "195.74.55.20"; };
-    v6 = {
-      local = "2a03:ee40:8080:9:1::2";
-      remote = "2a03:ee40:8080:9:1::1";
-    };
-  };
 in {
   imports = [
-    ../lib/bgp.nix
+    ../lib/blade-router.nix
     ../lib/blade.nix
     ../lib/fup.nix
   ];
 
   boot.loader.grub.device = "/dev/disk/by-id/usb-USB_SanDisk_3.2Gen1_0101cabb1ebdbdc0fd7b18edd207d43717c39c4a59d1b138b363e315841eca15743400000000000000000000443273100087260091558107b6a8e06e-0:0";
 
-  services.lukegbgp = {
-    enable = true;
-    config = {
-      local.routerID = internetAddresses.v4.local;
-      peering.veloxserv = {
-        local = {
-          asn = 205479;
-          v4 = internetAddresses.v4.local;
-          v6 = internetAddresses.v6.local;
-        };
-        remote = {
-          asn = 3170;
-          export_community = 4001;
-          routers = [{ v4 = internetAddresses.v4.remote; v6 = internetAddresses.v6.remote; }];
-        };
-      };
-      export.v4 = [ "92.118.28.0/24" ];
-      export.v6 = [ "2a09:a441::/32" ];
-    };
-  };
-
   # Networking!
   networking = {
     hostName = "blade-tuvok";
     hostId = "525229f7";
-    interfaces.br-public.ipv4.addresses = [{
-      address = "92.118.28.253";
-      prefixLength = 24;
-    }];
-    interfaces.br-public.ipv6.addresses = [{
-      address = "2a09:a441::fffe";
-      prefixLength = 48;
-    }];
-    interfaces.en-internet.ipv4.addresses = [{
-      address = internetAddresses.v4.local;
-      prefixLength = 31;
-    }];
-    interfaces.en-internet.ipv6.addresses = [{
-      address = internetAddresses.v6.local;
-      prefixLength = 126;
-    }];
-    defaultGateway = internetAddresses.v4.remote;
-    defaultGateway6 = internetAddresses.v6.remote;
     firewall.allowedTCPPorts = [ 80 443 ];
-    firewall.extraCommands = ''
-      iptables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
-      ip6tables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
-    '';
   };
   my.ip.tailscale = "100.119.123.33";
   my.blade.bay = 6;
@@ -121,46 +70,20 @@ in {
     "0.0.0.0" "[::]"
   ];
 
-  services.keepalived = let
-    mgmtBase = {
-      interface = "br-mgmt";
-      state = "MASTER";
-      priority = 50;
-    };
-  in {
-    enable = true;
-    vrrpInstances.mgmtGateway = mgmtBase // {
-      virtualIps = [
-        { addr = "10.100.0.1/23"; }
-        { addr = "92.118.28.1/24"; dev = "br-public"; }
-      ];
-      virtualRouterId = 1;
-    };
-    vrrpInstances.mgmtGateway6 = mgmtBase // {
-      virtualIps = [
-        { addr = "fe80::f00f/64"; dev = "br-public"; }
-        { addr = "2a09:a441::/48"; dev = "br-public"; }
-      ];
-      virtualRouterId = 2;
-    };
-  };
-
-  services.radvd = {
-    enable = true;
-    config = ''
-      interface br-public {
-        AdvSendAdvert on;
-        MinRtrAdvInterval 30;
-        MaxRtrAdvInterval 100;
-        AdvRASrcAddress {
-          fe80::f00f;
-        };
-        prefix 2a09:a441:ffff:ffff::/64 {
-          AdvOnLink on;
-          AdvAutonomous on;
-          AdvRouterAddr off;
-        };
+  my.blade-router = {
+    addresses.linknet = {
+      v4 = { local = "195.74.55.21"; remote = "195.74.55.20"; };
+      v6 = {
+        local = "2a03:ee40:8080:9:1::2";
+        remote = "2a03:ee40:8080:9:1::1";
       };
-    '';
+    };
+
+    addresses.br-public = {
+      v4.addr = "92.118.28.254";
+      v6.addr = "2a09:a441::ffff";
+    };
+
+    vrrp.priority = 100;
   };
 }
diff --git a/ops/nixos/lib/blade-router.nix b/ops/nixos/lib/blade-router.nix
new file mode 100644
index 0000000000..43c4b515f6
--- /dev/null
+++ b/ops/nixos/lib/blade-router.nix
@@ -0,0 +1,150 @@
+# SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+{ lib, ... }:
+with lib;
+{
+  imports = [
+    ../lib/bgp.nix
+  ];
+
+  options.my.blade-router = {
+    addresses.linknet.v4 = {
+      local = mkOption { type = types.str; };
+      remote = mkOption { type = types.str; };
+      prefixLength = mkOption { type = types.int; default = 31; };
+    };
+    addresses.linknet.v6 = {
+      local = mkOption { type = types.str; };
+      remote = mkOption { type = types.str; };
+      prefixLength = mkOption { type = types.int; default = 126; };
+    };
+
+    addresses.br-public.v4 = {
+      addr = mkOption { type = types.str; };
+      prefixLength = mkOption { type = types.int; default = 24; };
+    };
+    addresses.br-public.v6 = {
+      addr = mkOption { type = types.str; };
+      prefixLength = mkOption { type = types.int; default = 48; };
+    };
+
+    addresses.br-public-vip.v4 = {
+      addr = mkOption { type = types.str; default = "92.118.28.1"; };
+      prefixLength = mkOption { type = types.int; default = 24; };
+    };
+    addresses.br-public-vip.v6 = {
+      addr = mkOption { type = types.str; default = "2a09:a441::ffff"; };
+      prefixLength = mkOption { type = types.int; default = 48; };
+    };
+    addresses.br-public-vip.v6-ll = {
+      addr = mkOption { type = types.str; default = "fe80::f00f"; };
+      prefixLength = mkOption { type = types.int; default = 64; };
+    };
+
+    addresses.br-public-radvd-prefix = {
+      addr = mkOption { type = types.str; default = "2a09:a441:ffff:ffff::"; };
+      prefixLength = mkOption { type = types.int; default = 64; };
+    };
+
+    vrrp.priority = mkOption { type = types.int; };
+  };
+
+  config = {
+    boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
+    boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = 1;
+
+    networking = {
+      interfaces.br-public.ipv4.addresses = [{
+        address = config.my.blade-router.addresses.br-public.v4.addr;
+        prefixLength = config.my.blade-router.addresses.br-public.v4.prefixLength;
+      }];
+      interfaces.br-public.ipv6.addresses = [{
+        address = config.my.blade-router.addresses.br-public.v6.addr;
+        prefixLength = config.my.blade-router.addresses.br-public.v6.prefixLength;
+      }];
+      interfaces.en-internet.ipv4.addresses = [{
+        address = config.my.blade-router.addresses.linknet.v4.local;
+        prefixLength = config.my.blade-router.addresses.linknet.v4.prefixLength;;
+      }];
+      interfaces.en-internet.ipv6.addresses = [{
+        address = config.my.blade-router.addresses.linknet.v6.local;
+        prefixLength = config.my.blade-router.addresses.linknet.v6.prefixLength;
+      }];
+      defaultGateway = config.my.blade-router.addresses.linknet.v4.remote;
+      defaultGateway6 = config.my.blade-router.addresses.linknet.v6.remote;
+      firewall.extraCommands = ''
+        iptables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
+        ip6tables -A INPUT -p vrrp -i br-mgmt -j ACCEPT
+      '';
+    };
+
+    services.lukegbgp = {
+      enable = true;
+      config = {
+        local.routerID = config.my.blade-router.addresses.linknet.v4.local;
+        peering.veloxserv = {
+          local = {
+            asn = 205479;
+            v4 = config.my.blade-router.addresses.linknet.v4.local;
+            v6 = config.my.blade-router.addresses.linknet.v6.local;
+          };
+          remote = {
+            asn = 3170;
+            export_community = 4001;
+            routers = [{
+              v4 = config.my.blade-router.addresses.linknet.v4.remote;
+              v6 = config.my.blade-router.addresses.linknet.v6.remote;
+            }];
+          };
+        };
+        export.v4 = [ "92.118.28.0/24" ];
+        export.v6 = [ "2a09:a441::/32" ];
+      };
+    };
+
+    services.keepalived = let
+      mgmtBase = {
+        interface = "br-mgmt";
+        state = "MASTER";
+        priority = config.my.blade-router.vrrp.priority;
+      };
+    in {
+      enable = true;
+      vrrpInstances.mgmtGateway = mgmtBase // {
+        virtualIps = [
+          { addr = "10.100.0.1/23"; }
+          { addr = "${config.my.blade-router.addresses.br-public-vip.v4.addr}/${toString config.my.blade-router.addresses.br-public-vip.v4.prefixLength}"; dev = "br-public"; }
+        ];
+        virtualRouterId = 1;
+      };
+      vrrpInstances.mgmtGateway6 = mgmtBase // {
+        virtualIps = [
+          { addr = "${config.my.blade-router.addresses.br-public-vip.v6-ll.addr}/${toString config.my.blade-router.addresses.br-public-vip.v6-ll.prefixLength}"; dev = "br-public"; }
+          { addr = "${config.my.blade-router.addresses.br-public-vip.v6.addr}/${toString config.my.blade-router.addresses.br-public-vip.v6.prefixLength}"; dev = "br-public"; }
+        ];
+        virtualRouterId = 2;
+      };
+    };
+  };
+
+  services.radvd = {
+    enable = true;
+    config = ''
+      interface br-public {
+        AdvSendAdvert on;
+        MinRtrAdvInterval 30;
+        MaxRtrAdvInterval 100;
+        AdvRASrcAddress {
+          ${config.my.blade-router.addresses.br-public-vip.v6-ll.addr};
+        };
+        prefix ${config.my.blade-router.addresses.br-public-radvd-prefix.addr}/${toString config.my.blade-router.addresses.br-public-radvd-prefix.prefixLength} {
+          AdvOnLink on;
+          AdvAutonomous on;
+          AdvRouterAddr off;
+        };
+      };
+    '';
+  };
+}