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-rw-r--r--src/plugins/lb/node.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/plugins/lb/node.c b/src/plugins/lb/node.c
index 22ba3104f92..529da73bcff 100644
--- a/src/plugins/lb/node.c
+++ b/src/plugins/lb/node.c
@@ -306,12 +306,17 @@ lb_node_fn (vlib_main_t * vm,
} else if (encap_type == LB_ENCAP_TYPE_L3DSR) /* encap L3DSR*/
{
ip4_header_t *ip40;
+ tcp_header_t *th0;
ip40 = vlib_buffer_get_current(p0);
ip40->dst_address = lbm->ass[asindex0].address.ip4;
/* Get and rewrite DSCP bit */
ip40->tos = (u8)((vip0->dscp & 0x3F)<<2);
ip40->checksum = ip4_header_checksum (ip40);
+ /* Recomputing L4 checksum after dst-IP modifying */
+ th0 = ip4_next_header(ip40);
+ th0->checksum = 0;
+ th0->checksum = ip4_tcp_udp_compute_checksum(vm, p0, ip40);
}
if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED))