DHCP server beyond upstream router

Change-Id: I41ae02705c62e3144cf8cd914865c83b2c43ba61
diff --git a/trellis/dhcpd.conf b/trellis/dhcpd.conf
index 9dd56dd..c3a03e7 100644
--- a/trellis/dhcpd.conf
+++ b/trellis/dhcpd.conf
@@ -13,6 +13,9 @@
   option routers 10.0.3.254;
 }
 
+subnet 10.0.99.3 netmask 255.255.255.255 {
+}
+
 host h1 {
   hardware ethernet 00:aa:00:00:00:01;
   fixed-address 10.0.2.1;