diff -ruN net/isc-dhcp41-server.orig/files/patch-server__bpf.c net/isc-dhcp41-server/files/patch-server__bpf.c
--- net/isc-dhcp41-server.orig/files/patch-server__bpf.c	1970-01-01 03:00:00.000000000 +0300
+++ net/isc-dhcp41-server/files/patch-server__bpf.c	2010-10-22 10:39:22.887561512 +0400
@@ -0,0 +1,10 @@
+--- common/bpf.c.orig	2010-10-22 10:38:06.623559939 +0400
++++ common/bpf.c	2010-10-22 10:38:26.436563986 +0400
+@@ -577,6 +577,7 @@
+ 	 */
+         switch (sa->sdl_type) {
+                 case IFT_ETHER:
++                case IFT_L2VLAN:
+                         hw->hlen = sa->sdl_alen + 1;
+                         hw->hbuf[0] = HTYPE_ETHER;
+                         memcpy(&hw->hbuf[1], LLADDR(sa), sa->sdl_alen);