X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fesp_encrypt.c;h=ff9c1e63097b532cfed0db28f9611f8c3ee8dba2;hb=240f69aed757720cfb78a140aaa84eb31db198f4;hp=88eda91bf7fb8a0afd874bfd7d17a8f600a5d0e6;hpb=5a2e278a09726be627b8310e03f0522d60aafedf;p=vpp.git

diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index 88eda91bf7f..ff9c1e63097 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -311,7 +311,15 @@ esp_encrypt_inline (vlib_main_t * vm,
 		  vnet_buffer (o_b0)->sw_if_index[VLIB_TX] =
 		    vnet_buffer (i_b0)->sw_if_index[VLIB_TX];
 		}
-	      vlib_buffer_advance (i_b0, sizeof (ip4_header_t));
+
+	      if (is_ip6)
+		{
+		  vlib_buffer_advance (i_b0, sizeof (ip6_header_t));
+		}
+	      else
+		{
+		  vlib_buffer_advance (i_b0, sizeof (ip4_header_t));
+		}
 	    }
 
 	  ASSERT (sa0->crypto_alg < IPSEC_CRYPTO_N_ALG);