diff --git a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/hwsku.json b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/hwsku.json
index a407ccd840..0f17443e49 100644
--- a/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/hwsku.json
+++ b/device/arista/x86_64-arista_7050_qx32s/Arista-7050QX-32S-S4Q31/hwsku.json
@@ -1,143 +1,131 @@
 {
     "interfaces": {
         "Ethernet0": {
-            "default_brkout_mode": "1x10G",
-            "port_type": "RJ45"
-        },
-        "Ethernet1": {
-            "default_brkout_mode": "1x10G",
-            "port_type": "RJ45"
-        },
-        "Ethernet2": {
-            "default_brkout_mode": "1x10G",
-            "port_type": "RJ45"
-        },
-        "Ethernet3": {
-            "default_brkout_mode": "1x1G",
+            "default_brkout_mode": "3x10G(3)+1x1G(1)",
             "port_type": "RJ45"
         },
         "Ethernet4": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet8": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet12": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet16": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet20": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet24": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet28": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet32": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet36": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet40": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet44": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet48": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet52": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet56": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet60": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet64": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet68": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet72": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet76": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet80": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet84": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet88": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet92": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet96": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet100": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet104": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet108": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet112": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet116": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet120": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         },
         "Ethernet124": {
-            "default_brkout_mode": "1x40G",
+            "default_brkout_mode": "1x40G[10G]",
             "port_type": "QSFP+"
         }
     }
diff --git a/device/arista/x86_64-arista_7050_qx32s/platform.json b/device/arista/x86_64-arista_7050_qx32s/platform.json
index 2bcc31a9a3..4309fe6569 100644
--- a/device/arista/x86_64-arista_7050_qx32s/platform.json
+++ b/device/arista/x86_64-arista_7050_qx32s/platform.json
@@ -218,6 +218,12 @@
                 "1x40G[10G]": [
                     "Ethernet5/1"
                 ],
+                "3x10G(3)+1x1G(1)": [
+                    "Ethernet1",
+                    "Ethernet2",
+                    "Ethernet3",
+                    "Ethernet4"
+                ],
                 "2x20G[10G]": [
                     "Ethernet5/1",
                     "Ethernet5/3"
diff --git a/dockers/docker-lldp/lldpmgrd b/dockers/docker-lldp/lldpmgrd
index e786a39ee0..213c11a960 100755
--- a/dockers/docker-lldp/lldpmgrd
+++ b/dockers/docker-lldp/lldpmgrd
@@ -23,6 +23,8 @@ try:
     from sonic_py_common import daemon_base
     from swsscommon import swsscommon
     from sonic_py_common.interface import inband_prefix, recirc_prefix
+    from sonic_py_common import device_info
+
 except ImportError as err:
     raise ImportError("%s - required module not found" % str(err))
 
@@ -357,7 +359,8 @@ def run_cmd(self, cmd):
 
 def check_timeout(self, start_time):
     if time.time() - start_time > PORT_INIT_TIMEOUT:
-        self.log_error("Port init timeout reached ({} seconds), resuming lldpd...".format(PORT_INIT_TIMEOUT))
+        if device_info.is_frontend_port_present_in_host():
+            self.log_error("Port init timeout reached ({} seconds), resuming lldpd...".format(PORT_INIT_TIMEOUT))
         return True
     return False
 
diff --git a/files/build_templates/sonic_debian_extension.j2 b/files/build_templates/sonic_debian_extension.j2
index 499faff986..ab3a5c58a2 100644
--- a/files/build_templates/sonic_debian_extension.j2
+++ b/files/build_templates/sonic_debian_extension.j2
@@ -938,7 +938,8 @@ for fw_file_name in ${!FW_FILE_MAP[@]}; do
     # Link old FW location to not break existing automation/scripts
     sudo ln -s /host/image-$SONIC_IMAGE_VERSION/$PLATFORM_DIR/fw/asic/${FW_FILE_MAP[$fw_file_name]} $FILESYSTEM_ROOT/etc/mlnx/${FW_FILE_MAP[$fw_file_name]}
 done
-sudo cp $files_path/$ISSU_VERSION_FILE $FILESYSTEM_ROOT/etc/mlnx/issu-version
+sudo cp $files_path/$ISSU_VERSION_FILE $FILESYSTEM_ROOT/$PLATFORM_DIR/fw/asic/issu-version
+sudo ln -s /host/image-$SONIC_IMAGE_VERSION/$PLATFORM_DIR/fw/asic/issu-version $FILESYSTEM_ROOT/etc/mlnx/issu-version
 sudo cp $files_path/$MLNX_FFB_SCRIPT $FILESYSTEM_ROOT/usr/bin/mlnx-ffb.sh
 sudo cp $files_path/$MLNX_ONIE_FW_UPDATE $FILESYSTEM_ROOT/usr/bin/$MLNX_ONIE_FW_UPDATE
 sudo cp $files_path/$MLNX_SSD_FW_UPDATE $FILESYSTEM_ROOT/usr/bin/$MLNX_SSD_FW_UPDATE
diff --git a/files/scripts/arp_update b/files/scripts/arp_update
index 4b25973cfc..f267e05a54 100755
--- a/files/scripts/arp_update
+++ b/files/scripts/arp_update
@@ -89,32 +89,47 @@ while /bin/true; do
       eval `eval $ip6cmd`
  
       if [[ $SUBTYPE == "dualtor" ]]; then
-        # manually set any remaining FAILED/INCOMPLETE entries to permanently INCOMPLETE
-        # this prevents any remaining INCOMPLETE entries from automatically transitioning to FAILED
-        # once these entries are incomplete, any subsequent neighbor advertisement messages
-        # are able to resolve the entry
-
-        # generates the following command for each failed or incomplete IPv6 neighbor
-        # ip neigh replace <neighbor IPv6> dev <VLAN name> nud incomplete
-        neigh_replace_template="sed -e 's/^/ip neigh replace /' -e 's/,/ dev /' -e 's/$/ nud incomplete;/'" 
-        ip_neigh_replace_cmd="ip -6 neigh show | grep -v fe80 | grep $vlan | grep -E 'FAILED|INCOMPLETE' | cut -d ' ' -f 1,3 --output-delimiter=',' | $neigh_replace_template"
-        eval `eval $ip_neigh_replace_cmd`
-
-        # on dual ToR devices, try to resolve failed neighbor entries since
-        # these entries will have tunnel routes installed, preventing normal 
-        # neighbor resolution (SWSS PR #2137)
-
-        # since ndisc6 is a userland process, the above ndisc6 commands are 
-        # insufficient to update the kernel neighbor table for failed entries
-
-        # we don't need to do this for ipv4 neighbors since arping is able to
-        # update the kernel neighbor table
-
-        # generates the following command for each failed or incomplete IPv6 neighbor
+        # capture all current failed/incomplete IPv6 neighbors in the kernel to avoid situations where new neighbors are learned
+        # in the middle of the below sequence of commands
+        unresolved_kernel_neighbors=$(ip -6 neigh show | grep -v fe80 | grep $vlan | grep -E 'FAILED|INCOMPLETE')
+        failed_kernel_neighbors=$(echo "$unresolved_kernel_neighbors" | grep FAILED | cut -d ' ' -f 1)
+
+        # it's possible for kernel neighbors to fall out of sync with the hardware
+        # this can result in failed neighbors entries that don't have corresponding zero MAC neighbor entries
+        # and therefore don't have tunnel routes installed in the hardware
+        # flush these neighbors from the kernel to force relearning and resync them to the hardware:
+        # 1. for every FAILED or INCOMPLETE neighbor in the kernel, check if there is a corresponding zero MAC neighbor in APPL_DB
+        # 2. if no zero MAC neighbor entry exists, flush the kernel neighbor entry
+        #     - generates the command 'ip neigh flush <neighbor IPv6>' for all such neighbors
+        unsync_neighbors=$(echo "$unresolved_kernel_neighbors" | cut -d ' ' -f 1 | xargs -I{} bash -c "if [[ -z \"\$(sonic-db-cli APPL_DB hget NEIGH_TABLE:$vlan:{} neigh)\" ]]; then echo '{}'; fi")
+        if [[ ! -z "$unsync_neighbors" ]]; then
+            ip_neigh_flush_cmd="echo \"$unsync_neighbors\" | sed -e 's/^/ip neigh flush /' -e 's/$/;/'"
+            eval `eval "$ip_neigh_flush_cmd"`
+            sleep 2
+        fi
+
+        # generates the following command for each FAILED or INCOMPLETE IPv6 neighbor
         # timeout 0.2 ping <neighbor IPv6> -n -q -i 0 -c 1 -W 1 -I <VLAN name> >/dev/null
-        ping6_template="sed -e 's/^/timeout 0.2 ping /' -e 's/,/ -n -q -i 0 -c 1 -W 1 -I /' -e 's/$/ >\/dev\/null;/'"
-        failed_ip6_neigh_cmd="ip -6 neigh show | grep -v fe80 | grep $vlan | grep -E 'FAILED|INCOMPLETE' | cut -d ' ' -f 1,3 --output-delimiter=',' | $ping6_template"
-        eval `eval $failed_ip6_neigh_cmd`
+        if [[ ! -z "$unresolved_kernel_neighbors" ]]; then
+            ping6_template="sed -e 's/^/timeout 0.2 ping /' -e 's/,/ -n -q -i 0 -c 1 -W 1 -I /' -e 's/$/ >\/dev\/null;/'"
+            failed_ip6_neigh_cmd="echo \"$unresolved_kernel_neighbors\" | cut -d ' ' -f 1,3 --output-delimiter=',' | $ping6_template"
+            eval `eval "$failed_ip6_neigh_cmd"`
+            # allow some time for any transient INCOMPLETE neighbors to transition to FAILED
+            sleep 5
+        fi
+
+        # manually set any remaining FAILED entries to permanently INCOMPLETE
+        # once these entries are INCOMPLETE, any subsequent neighbor advertisement messages are able to resolve the entry
+        # ignore INCOMPLETE neighbors since if they are transiently incomplete (i.e. new kernel neighbors that we are attempting to resolve for the first time),
+        # setting them to permanently incomplete here means the kernel will never generate a netlink message for that neighbor
+        # generates the following command for each FAILED IPv6 neighbor
+        # ip neigh replace <neighbor IPv6> dev <VLAN name> nud incomplete
+        failed_kernel_neighbors=$(ip -6 neigh show | grep -v fe80 | grep $vlan | grep -E 'FAILED')
+        if [[ ! -z "$failed_kernel_neighbors" ]]; then
+            neigh_replace_template="sed -e 's/^/ip neigh replace /' -e 's/,/ dev /' -e 's/$/ nud incomplete;/'" 
+            ip_neigh_replace_cmd="echo \"$failed_kernel_neighbors\" | cut -d ' ' -f 1,3 --output-delimiter=',' | $neigh_replace_template"
+            eval `eval "$ip_neigh_replace_cmd"`
+        fi
       fi
   done
   
diff --git a/platform/mellanox/mlnx-ffb.sh b/platform/mellanox/mlnx-ffb.sh
index afe42c8198..75faeb514c 100755
--- a/platform/mellanox/mlnx-ffb.sh
+++ b/platform/mellanox/mlnx-ffb.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2018-2021 NVIDIA CORPORATION & AFFILIATES.
+# Copyright (c) 2018-2023 NVIDIA CORPORATION & AFFILIATES.
 # Apache-2.0
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -49,41 +49,47 @@ check_sdk_upgrade()
         return "${FFB_SUCCESS}"
     fi
 
-    while :; do
-        mkdir -p "${FS_MOUNTPOINT}"
-        mount -t squashfs "${FS_PATH}" "${FS_MOUNTPOINT}" || {
-            >&2 echo "Failed to mount next SONiC image"
+    ISSU_VERSION_FILE_PATH="/etc/mlnx/issu-version"
+    CURRENT_ISSU_VERSION="$(cat ${ISSU_VERSION_FILE_PATH})"
+    NEXT_ISSU_VERSION="Unknown"
+
+    # /host/image-<version>/platform/fw/asic/issu-version is now the new location for ISSU version.
+    NEXT_IMAGE_ISSU_VERSION_FILE_PATH="/host/image-${NEXT_SONIC_IMAGE#SONiC-OS-}/platform/fw/asic/issu-version"
+
+    if [ -f "${NEXT_IMAGE_ISSU_VERSION_FILE_PATH}" ]; then
+        NEXT_ISSU_VERSION="$(cat ${NEXT_IMAGE_ISSU_VERSION_FILE_PATH})"
+    else
+        while :; do
+            mkdir -p "${FS_MOUNTPOINT}"
+            mount -t squashfs "${FS_PATH}" "${FS_MOUNTPOINT}" || {
+                >&2 echo "Failed to mount next SONiC image"
+                break
+            }
+
+            [ -f "${ISSU_VERSION_FILE_PATH}" ] || {
+                >&2 echo "No ISSU version file found ${ISSU_VERSION_FILE_PATH}"
+                break
+            }
+
+            [ -f "${FS_MOUNTPOINT}/${ISSU_VERSION_FILE_PATH}" ] || {
+                >&2 echo "No ISSU version file found ${ISSU_VERSION_FILE_PATH} in ${NEXT_SONIC_IMAGE}"
+                break
+            }
+            NEXT_ISSU_VERSION="$(cat ${FS_MOUNTPOINT}/${ISSU_VERSION_FILE_PATH})"
             break
-        }
+        done
 
-        ISSU_VERSION_FILE_PATH="/etc/mlnx/issu-version"
-
-        [ -f "${ISSU_VERSION_FILE_PATH}" ] || {
-            >&2 echo "No ISSU version file found ${ISSU_VERSION_FILE_PATH}"
-            break
-        }
-
-        [ -f "${FS_MOUNTPOINT}/${ISSU_VERSION_FILE_PATH}" ] || {
-            >&2 echo "No ISSU version file found ${ISSU_VERSION_FILE_PATH} in ${NEXT_SONIC_IMAGE}"
-            break
-        }
-
-        CURRENT_ISSU_VERSION="$(cat ${ISSU_VERSION_FILE_PATH})"
-        NEXT_ISSU_VERSION="$(cat ${FS_MOUNTPOINT}/${ISSU_VERSION_FILE_PATH})"
-
-        if [[ "${CURRENT_ISSU_VERSION}" == "${NEXT_ISSU_VERSION}" ]]; then
-            CHECK_RESULT="${FFB_SUCCESS}"
-        else
-            >&2 echo "Current and next ISSU version do not match:"
-            >&2 echo "Current ISSU version: ${CURRENT_ISSU_VERSION}"
-            >&2 echo "Next ISSU version: ${NEXT_ISSU_VERSION}"
-        fi
-
-        break
-    done
+        umount -rf "${FS_MOUNTPOINT}" 2> /dev/null || true
+        rm -rf "${FS_MOUNTPOINT}" 2> /dev/null || true
+    fi
 
-    umount -rf "${FS_MOUNTPOINT}" 2> /dev/null || true
-    rm -rf "${FS_MOUNTPOINT}" 2> /dev/null || true
+    if [[ "${CURRENT_ISSU_VERSION}" == "${NEXT_ISSU_VERSION}" ]]; then
+        CHECK_RESULT="${FFB_SUCCESS}"
+    else
+        >&2 echo "Current and next ISSU version do not match:"
+        >&2 echo "Current ISSU version: ${CURRENT_ISSU_VERSION}"
+        >&2 echo "Next ISSU version: ${NEXT_ISSU_VERSION}"
+    fi
 
     return "${CHECK_RESULT}"
 }
diff --git a/src/sonic-py-common/sonic_py_common/device_info.py b/src/sonic-py-common/sonic_py_common/device_info.py
index e2b5f50028..4198a1394e 100644
--- a/src/sonic-py-common/sonic_py_common/device_info.py
+++ b/src/sonic-py-common/sonic_py_common/device_info.py
@@ -682,3 +682,13 @@ def is_fast_reboot_enabled():
 
     state_db.close(state_db.STATE_DB)
     return fb_enable_state
+
+
+def is_frontend_port_present_in_host():
+    if is_supervisor():
+        return False
+    if is_multi_npu():
+        namespace_id = os.getenv("NAMESPACE_ID")
+        if not namespace_id:
+            return False
+    return True
diff --git a/src/sonic-sairedis b/src/sonic-sairedis
index ec81223a4b..82a132f921 160000
--- a/src/sonic-sairedis
+++ b/src/sonic-sairedis
@@ -1 +1 @@
-Subproject commit ec81223a4bad1336ecfebf93ef859d9feafd445f
+Subproject commit 82a132f921d006937f37e3993515f774799c1204
diff --git a/src/sonic-swss-common b/src/sonic-swss-common
index 9569f3a500..8a53f0490c 160000
--- a/src/sonic-swss-common
+++ b/src/sonic-swss-common
@@ -1 +1 @@
-Subproject commit 9569f3a5007bcc1fc0c4842fc4fd233e6265b1d0
+Subproject commit 8a53f0490c54bb608f72249c6df995b1d40098bc
diff --git a/src/system-health/health_checker/sysmonitor.py b/src/system-health/health_checker/sysmonitor.py
index 8979327eaf..5f0456b7c7 100755
--- a/src/system-health/health_checker/sysmonitor.py
+++ b/src/system-health/health_checker/sysmonitor.py
@@ -11,6 +11,7 @@
 from . import utils
 from sonic_py_common.task_base import ProcessTaskBase
 from .config import Config
+import signal
 
 SYSLOG_IDENTIFIER = "system#monitor"
 REDIS_TIMEOUT_MS = 0
@@ -117,6 +118,8 @@ def __init__(self):
         self.state_db = None
         self.config_db = None
         self.config = Config()
+        self.mpmgr = multiprocessing.Manager()
+        self.myQ = self.mpmgr.Queue()
 
     #Sets system ready status to state db
     def post_system_status(self, state):
@@ -422,13 +425,11 @@ def system_service(self):
             self.state_db = swsscommon.SonicV2Connector(use_unix_socket_path=True)
             self.state_db.connect(self.state_db.STATE_DB)
         
-        mpmgr = multiprocessing.Manager()
-        myQ = mpmgr.Queue()
         try:
-            monitor_system_bus = MonitorSystemBusTask(myQ)
+            monitor_system_bus = MonitorSystemBusTask(self.myQ)
             monitor_system_bus.task_run()
             
-            monitor_statedb_table = MonitorStateDbTask(myQ)
+            monitor_statedb_table = MonitorStateDbTask(self.myQ)
             monitor_statedb_table.task_run()
             
         except Exception as e:
@@ -442,7 +443,7 @@ def system_service(self):
         # Queue to receive the STATEDB and Systemd state change event
         while not self.task_stopping_event.is_set():
             try:
-                msg = myQ.get(timeout=QUEUE_TIMEOUT)
+                msg = self.myQ.get(timeout=QUEUE_TIMEOUT)
                 event = msg["unit"]
                 event_src = msg["evt_src"]
                 event_time = msg["time"]
@@ -466,5 +467,24 @@ def task_worker(self):
             return
         self.system_service()
 
+    def task_stop(self):
+        # Signal the process to stop
+        self.task_stopping_event.set()
+        #Clear the resources of mpmgr- Queue
+        self.mpmgr.shutdown()
+
+        # Wait for the process to exit
+        self._task_process.join(self._stop_timeout_secs)
+
+        # If the process didn't exit, attempt to kill it
+        if self._task_process.is_alive():
+            logger.log_notice("Attempting to kill sysmon main process with pid {}".format(self._task_process.pid))
+            os.kill(self._task_process.pid, signal.SIGKILL)
+
+        if self._task_process.is_alive():
+            logger.log_error("Sysmon main process with pid {} could not be killed".format(self._task_process.pid))
+            return False
+
+        return True