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-rw-r--r--src/vnet/interface_output.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/vnet/interface_output.c b/src/vnet/interface_output.c
index cc4997a3b49..c4a4b0f228d 100644
--- a/src/vnet/interface_output.c
+++ b/src/vnet/interface_output.c
@@ -475,7 +475,10 @@ VLIB_NODE_FN (vnet_interface_output_node)
ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
- if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) == 0)
+ /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
+ * here before sending to the interface */
+ if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) !=
+ VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
do_tx_offloads = 1;
if (do_tx_offloads == 0 && arc_or_subif == 0)