Add DHCPv6 to trellis script

Change-Id: Idbebc1597c41eb942894d0c3b9a260e9dfa14bfc
diff --git a/trellis/dhcpd6.conf b/trellis/dhcpd6.conf
index a8d20ff..526de85 100644
--- a/trellis/dhcpd6.conf
+++ b/trellis/dhcpd6.conf
@@ -4,7 +4,7 @@
 option dhcp6.next-hop code 242 = ip6-address;
 
 subnet6 2000::200/120 {
-  range6 2000::260 2000::02fe;
+  range6 2000::260 2000::2fe;
   option dhcp6.next-hop 2000::02ff;
 }