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Thanks Kyle, it solved my problem.

Regards,
Sayaji


On Fri, Nov 29, 2013 at 7:56 PM, Kyle Mestery (kmestery) <kmestery at cisco.com
> wrote:

> On Nov 29, 2013, at 1:11 PM, Sayaji Patil <sayaji15 at gmail.com> wrote:
> >
> > Hi,
> >      I have set up an all-in-one installation using devstack. When I try
> to create an instance, I get this error when the plugin tries to create a
> vlan on the nexus switch
> >
> > 2013-11-27 16:38:29.752 ^[[00;32mDEBUG ncclient.transport.ssh
> [^[[00;36m-^[[00;32m] ^[[01;35m^[[00;32mstarting thread (client mode):
> 0x4509ed0L^[[00m ^[[00;33mfrom (pid=13833) _log
> /usr/lib/python2.6/site-packages/paramiko/transport.py:1406^[[00m
> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mException: Error reading SSH
> protocol banner^[[00m
> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mTraceback (most recent call
> last):^[[00m
> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m  File
> "/usr/lib/python2.6/site-packages/paramiko/transport.py", line 1557, in
> run^[[00m
> > 2013-11-27 16:38:29.753 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m    self._check_banner()^[[00m
> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m  File
> "/usr/lib/python2.6/site-packages/paramiko/transport.py", line 1683, in
> _check_banner^[[00m
> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m    raise SSHException('Error
> reading SSH protocol banner' + str(x))^[[00m
> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31mSSHException: Error reading SSH
> protocol banner^[[00m
> > 2013-11-27 16:38:29.754 ^[[01;31mERROR ncclient.transport.ssh
> [^[[00;36m-^[[01;31m] ^[[01;35m^[[01;31m^[[00m
> > 2013-11-27 16:38:29.754 ^[[01;31mERROR neutron.plugins.ml2.managers
> [^[[01;36mreq-b51e27b6-2808-47ad-95db-e9d0113fcfe1 ^[[00;36mNone
> None^[[01;31m] ^[[01;35m^[[01;31mMechanism driver 'cisco_nexus' failed in
> update_port_postcommit^[[00m
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00mTraceback (most recent call last):
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
> line 156, in _call_on_drivers
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    getattr(driver.obj, method_name)(context)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
> line 159, in update_port_postcommit
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    self._invoke_nexus_on_port_event(context)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
> line 149, in _invoke_nexus_on_port_event
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    self._manage_port(vlan_name, vlan_id, host_id,
> instance_id)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/mech_cisco_nexus.py",
> line 114, in _manage_port
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    vlan_name, port_id)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
> line 194, in create_and_trunk_vlan
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    self.create_vlan(nexus_host, vlan_id, vlan_name)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
> line 131, in create_vlan
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    self._edit_config(nexus_host, target='running',
> config=confstr)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
> line 68, in _edit_config
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    mgr = self.nxos_connect(nexus_host)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus_network_driver.py",
> line 114, in nxos_connect
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m    raise cexc.NexusConnectFailed(nexus_host=nexus_host,
> exc=e)
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00mNexusConnectFailed: Unable to connect to Nexus 172.25.31.82.
> Reason: Negotiation failed.
> > ^[[01;31m2013-11-27 16:38:29.754 TRACE neutron.plugins.ml2.managers
> ^[[01;35m^[[00m
> > 2013-11-27 16:38:29.755 ^[[01;31mERROR neutron.openstack.common.rpc.amqp
> [^[[01;36mreq-b51e27b6-2808-47ad-95db-e9d0113fcfe1 ^[[00;36mNone
> None^[[01;31m] ^[[01;35m^[[01;31mException during message handling^[[00m
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00mTraceback (most recent call last):
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/openstack/common/rpc/amqp.py", line 438, in
> _process_data
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    **args)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/common/rpc.py", line 44,
> in dispatch
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    neutron_ctxt, version, method, namespace, **kwargs)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File
> "/opt/stack/neutron/neutron/openstack/common/rpc/dispatcher.py", line 172,
> in dispatch
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    result = getattr(proxyobj, method)(ctxt, **kwargs)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/rpc.py", line
> 192, in update_device_up
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    q_const.PORT_STATUS_ACTIVE)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/plugin.py",
> line 690, in update_port_status
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m
>  self.mechanism_manager.update_port_postcommit(mech_context)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
> line 395, in update_port_postcommit
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    self._call_on_drivers("update_port_postcommit", context)
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m  File "/opt/stack/neutron/neutron/plugins/ml2/managers.py",
> line 167, in _call_on_drivers
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00m    method=method_name
> > ^[[01;31m2013-11-27 16:38:29.755 TRACE neutron.openstack.common.rpc.amqp
> ^[[01;35m^[[00mMechanismDriverError: update_port_postcommit failed.
> >
> > Also now when I try to manually ssh to the switch, I get this error
> >
> > [root at openstackcoi logs]# ssh 172.25.31.82 -l admin
> > ssh_exchange_identification: Connection closed by remote host
> >
> > This is my ml2_conf_cisco.ini
> >
> > [ml2_mech_cisco_nexus:172.25.31.82]
> > openstackcoi=1/1
> > ssh_port=22
> > username=admin
> > password=*******
> >
> > Regards,
> > Sayaji
> >
> Sayali:
>
> Can you try ensuring you've done an ssh to the switch using the
> same username you are running devstack as? I believe you have
> to do this for the ssh to work, and only need to do this once. Let
> me know if this solves your problem.
>
> Thanks,
> Kyle
>
> >
> >
> > _______________________________________________
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>
>
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