Index: if_rlreg.h
===================================================================
RCS file: /home/ncvs/src/sys/pci/if_rlreg.h,v
retrieving revision 1.64
diff -u -r1.64 if_rlreg.h
--- if_rlreg.h	16 Jan 2007 20:35:23 -0000	1.64
+++ if_rlreg.h	20 Jan 2007 05:05:21 -0000
@@ -443,7 +443,12 @@
 #define RL_RX_BUF_SZ		RL_RXBUF_64
 #define RL_RXBUFLEN		(1 << ((RL_RX_BUF_SZ >> 11) + 13))
 #define RL_TX_LIST_CNT		4
-#define RL_MIN_FRAMELEN		60
+/*
+ * re(4) hardware IPv4 Tx checksum offload could be mangled with 28 bytes
+ * or less IP packets.
+ */
+#define RL_TXCSUM_MINLEN	28
+#define RL_MIN_FRAMELEN		(ETHER_HDR_LEN + RL_TXCSUM_MINLEN)
 #define RL_TXTHRESH(x)		((x) << 11)
 #define RL_TX_THRESH_INIT	96
 #define RL_RX_FIFOTHRESH	RL_RXFIFO_NOTHRESH