diff --git a/neutron_tempest_plugin/common/ip.py b/neutron_tempest_plugin/common/ip.py
index 83cd3d9..d981770 100644
--- a/neutron_tempest_plugin/common/ip.py
+++ b/neutron_tempest_plugin/common/ip.py
@@ -36,13 +36,19 @@
     sudo = 'sudo'
     ip_path = '/sbin/ip'
 
-    def __init__(self, ssh_client=None, timeout=None):
+    def __init__(self, ssh_client=None, timeout=None, namespace=None):
         self.ssh_client = ssh_client
         self.timeout = timeout
+        self.namespace = namespace
 
     def get_command(self, obj, *command):
-        command_line = '{sudo!s} {ip_path!r} {object!s} {command!s}'.format(
-            sudo=self.sudo, ip_path=self.ip_path, object=obj,
+        command_line = '{sudo!s} {ip_path!r} '.format(sudo=self.sudo,
+                                                     ip_path=self.ip_path)
+        if self.namespace:
+            command_line += 'netns exec {ns_name!s} {ip_path!r} '.format(
+                ns_name=self.namespace, ip_path=self.ip_path)
+        command_line += '{object!s} {command!s}'.format(
+            object=obj,
             command=subprocess.list2cmdline([str(c) for c in command]))
         return command_line
 
@@ -84,6 +90,13 @@
             self.add_address(address=subport_ip, device=subport_device)
         return subport_device
 
+    def list_namespaces(self):
+        namespaces_output = self.execute("netns")
+        ns_list = []
+        for ns_line in namespaces_output.split("\n"):
+            ns_list.append(ns_line.split(" ", 1)[0])
+        return ns_list
+
     def list_addresses(self, device=None, ip_addresses=None, port=None,
                        subnets=None):
         command = ['list']
@@ -308,20 +321,24 @@
                    netaddr.IPNetwork(subnet['cidr']).prefixlen)
 
 
-def arp_table():
+def arp_table(namespace=None):
     # 192.168.0.16  0x1  0x2  dc:a6:32:06:56:51  *  enp0s31f6
     regex_str = (r"([^ ]+)\s+(0x\d+)\s+(0x\d+)\s+(\w{2}\:\w{2}\:\w{2}\:\w{2}\:"
                  r"\w{2}\:\w{2})\s+([\w+\*]+)\s+([\-\w]+)")
     regex = re.compile(regex_str)
     arp_table = []
-    with open('/proc/net/arp', 'r') as proc_file:
-        for line in proc_file.readlines():
-            m = regex.match(line)
-            if m:
-                arp_table.append(ARPregister(
-                    ip_address=m.group(1), hw_type=m.group(2),
-                    flags=m.group(3), mac_address=m.group(4),
-                    mask=m.group(5), device=m.group(6)))
+    cmd = ""
+    if namespace:
+        cmd = "sudo ip netns exec %s " % namespace
+    cmd += "cat /proc/net/arp"
+    arp_entries = shell.execute(cmd).stdout.split("\n")
+    for line in arp_entries:
+        m = regex.match(line)
+        if m:
+            arp_table.append(ARPregister(
+                ip_address=m.group(1), hw_type=m.group(2),
+                flags=m.group(3), mac_address=m.group(4),
+                mask=m.group(5), device=m.group(6)))
     return arp_table
 
 
diff --git a/neutron_tempest_plugin/scenario/base.py b/neutron_tempest_plugin/scenario/base.py
index 8481edc..2eb45f8 100644
--- a/neutron_tempest_plugin/scenario/base.py
+++ b/neutron_tempest_plugin/scenario/base.py
@@ -21,6 +21,7 @@
 from neutron_lib.api import validators
 from neutron_lib import constants as neutron_lib_constants
 from oslo_log import log
+from paramiko import ssh_exception as ssh_exc
 from tempest.common.utils import net_utils
 from tempest.common import waiters
 from tempest.lib.common.utils import data_utils
@@ -269,7 +270,7 @@
                                 pkey=ssh_key, timeout=ssh_timeout)
         try:
             ssh_client.test_connection_auth()
-        except lib_exc.SSHTimeout as ssh_e:
+        except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
             LOG.debug(ssh_e)
             self._log_console_output(servers)
             self._log_local_network_status()
@@ -299,10 +300,20 @@
                           "for the console log", server['id'])
 
     def _log_local_network_status(self):
-        local_routes = ip_utils.IPCommand().list_routes()
-        LOG.debug('Local routes:\n%s', '\n'.join(str(r) for r in local_routes))
+        self._log_ns_network_status()
+        for ns_name in ip_utils.IPCommand().list_namespaces():
+            self._log_ns_network_status(ns_name=ns_name)
+
+    def _log_ns_network_status(self, ns_name=None):
+        local_ips = ip_utils.IPCommand(namespace=ns_name).list_addresses()
+        LOG.debug('Namespace %s; IP Addresses:\n%s',
+                  ns_name, '\n'.join(str(r) for r in local_ips))
+        local_routes = ip_utils.IPCommand(namespace=ns_name).list_routes()
+        LOG.debug('Namespace %s; Local routes:\n%s',
+                  ns_name, '\n'.join(str(r) for r in local_routes))
         arp_table = ip_utils.arp_table()
-        LOG.debug('Local ARP table:\n%s', '\n'.join(str(r) for r in arp_table))
+        LOG.debug('Namespace %s; Local ARP table:\n%s',
+                  ns_name, '\n'.join(str(r) for r in arp_table))
 
     def _check_remote_connectivity(self, source, dest, count,
                                    should_succeed=True,
@@ -384,12 +395,14 @@
                 fragmentation,
                 timeout=timeout, pattern=pattern,
                 forbid_packet_loss=forbid_packet_loss))
-        except lib_exc.SSHTimeout as ssh_e:
+        except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
             LOG.debug(ssh_e)
             self._log_console_output(servers)
+            self._log_local_network_status()
             raise
         except AssertionError:
             self._log_console_output(servers)
+            self._log_local_network_status()
             raise
 
     def ping_ip_address(self, ip_address, should_succeed=True,
@@ -499,15 +512,17 @@
                     **kwargs)
                 self.assertIn(server['name'],
                               ssh_client.exec_command('hostname'))
-        except lib_exc.SSHTimeout as ssh_e:
+        except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
             LOG.debug(ssh_e)
             if log_errors:
                 self._log_console_output(servers)
+                self._log_local_network_status()
             raise
         except AssertionError as assert_e:
             LOG.debug(assert_e)
             if log_errors:
                 self._log_console_output(servers)
+                self._log_local_network_status()
             raise
 
     def ensure_nc_listen(self, ssh_client, port, protocol, echo_msg=None,
@@ -532,9 +547,10 @@
             return ssh_client.execute_script(
                 get_ncat_server_cmd(port, protocol, echo_msg),
                 become_root=True, combine_stderr=True)
-        except lib_exc.SSHTimeout as ssh_e:
+        except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
             LOG.debug(ssh_e)
             self._log_console_output(servers)
+            self._log_local_network_status()
             raise
 
     def nc_client(self, ip_address, port, protocol):
diff --git a/neutron_tempest_plugin/scenario/test_ipv6.py b/neutron_tempest_plugin/scenario/test_ipv6.py
index 741945a..732c96d 100644
--- a/neutron_tempest_plugin/scenario/test_ipv6.py
+++ b/neutron_tempest_plugin/scenario/test_ipv6.py
@@ -15,6 +15,7 @@
 
 from neutron_lib import constants as lib_constants
 from oslo_log import log
+from paramiko import ssh_exception as ssh_exc
 from tempest.common import utils as tempest_utils
 from tempest.lib.common.utils import data_utils
 from tempest.lib import decorators
@@ -108,16 +109,22 @@
                     return True
             return False
 
-        # Set NIC with IPv6 to be UP and wait until IPv6 address will be
-        # configured on this NIC
-        turn_nic6_on(ssh_client, ipv6_port)
-        # And check if IPv6 address will be properly configured on this NIC
-        utils.wait_until_true(
-            lambda: guest_has_address(ipv6_address),
-            timeout=120,
-            exception=RuntimeError(
-                "Timed out waiting for IP address {!r} to be configured in "
-                "the VM {!r}.".format(ipv6_address, vm['id'])))
+        try:
+            # Set NIC with IPv6 to be UP and wait until IPv6 address will be
+            # configured on this NIC
+            turn_nic6_on(ssh_client, ipv6_port)
+            # And check if IPv6 address will be properly configured on this NIC
+            utils.wait_until_true(
+                lambda: guest_has_address(ipv6_address),
+                timeout=120,
+                exception=RuntimeError(
+                    "Timed out waiting for IP address {!r} to be configured "
+                    "in the VM {!r}.".format(ipv6_address, vm['id'])))
+        except (lib_exc.SSHTimeout, ssh_exc.AuthenticationException) as ssh_e:
+            LOG.debug(ssh_e)
+            self._log_console_output([vm])
+            self._log_local_network_status()
+            raise
 
     def _test_ipv6_hotplug(self, ra_mode, address_mode):
         ipv6_networks = [self.create_network() for _ in range(2)]
diff --git a/neutron_tempest_plugin/scenario/test_security_groups.py b/neutron_tempest_plugin/scenario/test_security_groups.py
index 23a5224..9059a2f 100644
--- a/neutron_tempest_plugin/scenario/test_security_groups.py
+++ b/neutron_tempest_plugin/scenario/test_security_groups.py
@@ -33,13 +33,15 @@
     required_extensions = ['router', 'security-group']
 
     def _verify_http_connection(self, ssh_client, ssh_server,
-                                test_ip, test_port, should_pass=True):
+                                test_ip, test_port, servers, should_pass=True):
         """Verify if HTTP connection works using remote hosts.
 
         :param ssh.Client ssh_client: The client host active SSH client.
         :param ssh.Client ssh_server: The HTTP server host active SSH client.
         :param string test_ip: IP address of HTTP server
         :param string test_port: Port of HTTP server
+        :param list servers: List of servers for which console output will be
+                             logged in case when test case
         :param bool should_pass: Wheter test should pass or not.
 
         :return: if passed or not
@@ -57,6 +59,8 @@
         except Exception as e:
             if not should_pass:
                 return
+            self._log_console_output(servers)
+            self._log_local_network_status()
             raise e
 
     @classmethod
@@ -378,6 +382,7 @@
                 ssh_clients[0],
                 ssh_clients[2],
                 test_ip, port,
+                servers,
                 should_pass=False)
 
         # add two remote-group rules with port-ranges
@@ -399,7 +404,8 @@
             self._verify_http_connection(
                 ssh_clients[0],
                 ssh_clients[2],
-                test_ip, port)
+                test_ip, port,
+                servers)
 
     @decorators.idempotent_id('f07d0159-8f9e-4faa-87f5-a869ab0ad490')
     def test_intra_sg_isolation(self):