diff --git a/SOURCES/openvswitch-3.1.0.patch b/SOURCES/openvswitch-3.1.0.patch
index 4ea4d9a..18b6c26 100644
--- a/SOURCES/openvswitch-3.1.0.patch
+++ b/SOURCES/openvswitch-3.1.0.patch
@@ -5791,7 +5791,7 @@ index 80da20d9f0..5cb1fc89ae 100644
      if (retval < 0) {
          retval = -retval;
 diff --git a/lib/odp-execute-avx512.c b/lib/odp-execute-avx512.c
-index c28461ec1a..0bf8cdf259 100644
+index c28461ec1a..d367130fdb 100644
 --- a/lib/odp-execute-avx512.c
 +++ b/lib/odp-execute-avx512.c
 @@ -357,6 +357,8 @@ avx512_get_delta(__m256i old_header, __m256i new_header)
@@ -5813,6 +5813,21 @@ index c28461ec1a..0bf8cdf259 100644
      v_delta = _mm256_hadd_epi32(v_delta, v_zeros);
      v_delta = _mm256_hadd_epi16(v_delta, v_zeros);
  
+@@ -699,6 +704,14 @@ action_avx512_set_ipv6(struct dp_packet_batch *batch, const struct nlattr *a)
+         }
+         /* Write back the modified IPv6 addresses. */
+         _mm512_mask_storeu_epi64((void *) nh, 0x1F, v_new_hdr);
++
++        /* Scalar method for setting IPv6 tclass field. */
++        if (key->ipv6_tclass) {
++            uint8_t old_tc = ntohl(get_16aligned_be32(&nh->ip6_flow)) >> 20;
++            uint8_t key_tc = key->ipv6_tclass | (old_tc & ~mask->ipv6_tclass);
++
++            packet_set_ipv6_tc(&nh->ip6_flow, key_tc);
++        }
+     }
+ }
+ #endif /* HAVE_AVX512VBMI */
 diff --git a/lib/odp-util.c b/lib/odp-util.c
 index 5fc312f8c0..fa353eab5c 100644
 --- a/lib/odp-util.c
@@ -6115,6 +6130,31 @@ index b9eb0928df..d2455fc977 100644
  #ifdef __cplusplus
  }
  #endif
+diff --git a/lib/packets.c b/lib/packets.c
+index 06f516cb1a..5640a2485c 100644
+--- a/lib/packets.c
++++ b/lib/packets.c
+@@ -1282,7 +1282,7 @@ packet_set_ipv6_flow_label(ovs_16aligned_be32 *flow_label, ovs_be32 flow_key)
+     put_16aligned_be32(flow_label, new_label);
+ }
+ 
+-static void
++void
+ packet_set_ipv6_tc(ovs_16aligned_be32 *flow_label, uint8_t tc)
+ {
+     ovs_be32 old_label = get_16aligned_be32(flow_label);
+diff --git a/lib/packets.h b/lib/packets.h
+index 8626aac8d5..1fcc7b0920 100644
+--- a/lib/packets.h
++++ b/lib/packets.h
+@@ -1598,6 +1598,7 @@ void packet_set_ipv6_addr(struct dp_packet *packet, uint8_t proto,
+                           ovs_16aligned_be32 addr[4],
+                           const struct in6_addr *new_addr,
+                           bool recalculate_csum);
++void packet_set_ipv6_tc(ovs_16aligned_be32 *flow_label, uint8_t tc);
+ void packet_set_tcp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
+ void packet_set_udp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
+ void packet_set_sctp_port(struct dp_packet *, ovs_be16 src, ovs_be16 dst);
 diff --git a/lib/route-table.c b/lib/route-table.c
 index ac82cf262f..6df7237e10 100644
 --- a/lib/route-table.c
diff --git a/SPECS/openvswitch3.1.spec b/SPECS/openvswitch3.1.spec
index f5d8c13..f106afc 100644
--- a/SPECS/openvswitch3.1.spec
+++ b/SPECS/openvswitch3.1.spec
@@ -63,7 +63,7 @@ Summary: Open vSwitch
 Group: System Environment/Daemons daemon/database/utilities
 URL: http://www.openvswitch.org/
 Version: 3.1.0
-Release: 127%{?dist}
+Release: 128%{?dist}
 
 # Nearly all of openvswitch is ASL 2.0.  The bugtool is LGPLv2+, and the
 # lib/sflow*.[ch] files are SISSL
@@ -757,6 +757,12 @@ exit 0
 %endif
 
 %changelog
+* Tue Jun 25 2024 Open vSwitch CI <ovs-ci@redhat.com> - 3.1.0-128
+- Merging upstream branch-3.1 [RH git: 83707bfe66]
+    Commit list:
+    9e59834e6b odp-execute: Set IPv6 traffic class in AVX implementation.
+
+
 * Wed Jun 19 2024 Open vSwitch CI <ovs-ci@redhat.com> - 3.1.0-127
 - Merging upstream branch-3.1 [RH git: 1b73710c1b]
     Commit list: