Solved: ah great rouge!! thanks for

rouge00rouge00rouge0 · ‎02-20-2017

Hi all,

I use IOS-XR ver 6.1.2.

After I establish the NETCONF connection to the IOS-XR, I send "Hello Message" as bellows.

But at the moment Hello Message is sent , NETCONF conneciton is disconnected.

Does the hello message have the wrong point?

-------------------------------------------------------------------

root@manager:~# ssh -l <user> <IOS-XR IP> -s netconf
<user>@<IOS-XR IP>'s password:
<hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<capabilities>
...
</capabilities>
<session-id>1231927858</session-id>
</hello>
]]>]]>
<?xml version="1.0" encoding="UTF-8"?>
<hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
    <capabilities>
        <capability>
            urn:ietf:params:netconf:base:1.0
        </capability>
        <capability>
            urn:ietf:params:netconf:capability:candidate:1.0
        </capability>
        <capability>
            urn:ietf:params:netconf:capability:notification:1.0
        </capability>
    </capabilities>
</hello>
]]>]]>
root@manager:~#

-------------------------------------------------------------------

Thanks,

xthuijs · ‎03-06-2017

hi rouge,

good news, norio from our development team focussing on netconf whom I had been speaking with on this posted a client to use here:

https://github.com/nnakamot/netconf_client

I have asked him to watch this thread in case you have follow up questions or need more support in case the associated readme doesnt provide for all the answers :)

have a look at this and let us know how it rolls :)

cheers

xander

View solution in original post

xthuijs · ‎02-25-2017

hi rough, yeah I see what is going on, the hello message is not correctly formatted.

I beleive the rfc asks for the capability request to be suggested and closed in the same line for security reasons or so.

The xml/ns designator in your request needs to be omitted also.

Here is a template:

Incorrect:

<?xml version="1.0" encoding="UTF-8"?>

<hello>

   <capabilities>

       <capability>

           urn:ietf:params:xml:ns:netconf:base:1.0

     </capability>

    </capabilities>

</hello>

]]>]]>

Correct:

<?xml version="1.0" encoding="UTF-8"?>

<hello>

  <capabilities>

    <capability>urn:ietf:params:netconf:base:1.0</capability>

  </capabilities>

</hello>]]>]]>

xander

rouge00rouge00rouge0 · ‎02-26-2017

HI xthuijs,

Thank you for response.

According to your advice, I sent the hello message as bellows.

But, NETCONF conneciton is disconnected also.

-------------------------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<hello>
    <capabilities>
        <capability>urn:ietf:params:netconf:base:1.0</capability>
        <capability>urn:ietf:params:netconf:capability:candidate:1.0</capability>
        <capability>urn:ietf:params:netconf:capability:notification:1.0</capability>
    </capabilities>
</hello>
]]>]]>

-------------------------------------------------------------

Is there the point wrong elsewhere?

BTW, I use XRv ver 6.1.2.

rouge

xthuijs · ‎02-27-2017

hi rouge, hmm, can you share the config that you have for this?

show run | i "xml|netconf|ssh"

do you get an error on the console that says pty read error or something similar?

can you run a query, like this what you did above, and get the

show netconf-yang trace last 30

this may help to identify what goes wrong.

cheers

xander

rouge00rouge00rouge0 · ‎02-28-2017

Hi xthuijs,

I issue 'show run | i "xml|netconf|ssh"'.

------------------
Building configuration...
xml agent tty
netconf agent tty
netconf-yang agent
ssh
ssh server v2
------------------

> do you get an error on the console that says pty read error or something similar?
No, when I issue the above hello, no messages is indicated and NETCONF is disconnected.

After I issue the above hello, I see 'show netconf-yang trace last 30"'.
It seems namespace error happens.

------------------
Mar 1 01:36:06.996 netconf-yfw/bk.trace 0/0/CPU0 t1 TRC: me_bk_sysdb_bag_cache_flush:3794 ctx=12016780,Flushing bag cache.
Mar 1 01:36:06.996 netconf-yfw/bk.trace 0/0/CPU0 t1 TRC: me_bk_sysdb_pack_cache_flush:1327 ctx=12016780,Flushing pack cache.
Mar 1 01:36:06.996 netconf-yfw/bk.trace 0/0/CPU0 t1 DBG: sysdb_backend_session_drop:1561 ctx=12016780,SysDB backend session dropped (1343696c).
Mar 1 01:36:06.996 netconf-yfw/processor.trace 0/0/CPU0 t1 TRC: yfw_req_session_stop:502 ctx=1200a8bc,ses=12430a78,op=12,session stop success, removed session-id=2317232025
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 TRC: nc_sm_rcv_eom:4326 EOM received, data len: 327
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 TRC: nc_sm_rcv_eom:4327 Received data (len:327): '<?xml version="1.0" encoding="UTF-8"?>
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 <hello>
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1      <capabilities>
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1          <capability>urn:ietf:params:netconf:base:1.0</capability>
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1          <capability>urn:ietf:params:netconf:capability:candidate:1.0</cap
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 ERR: nc_sm_hello_validate:3028 Error, namespace is NULL, expected: urn:ietf:params:xml:ns:netconf:base:1.0
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 ERR: nc_sm_rcv_eom:4332 Hello message validation failed
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 ERR: nc_sm_pxs_readable_msg_handle:5873 Decoding of incoming NETCONF data failed: 'Netconf server' detected the 'warning' condition 'NC_ERRCODE_REQ_INVALID'
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 ERR: nc_sm_pxs_readable_handle:5934 Failed to handle SSH IPC message: 'Netconf server' detected the 'warning' condition 'NC_ERRCODE_REQ_INVALID', msg:134150fc, session:1342d6ec
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 TRC: nc_sm_session_find_session_id:1405 Found session 2317232025 1342d6ec
Mar 1 01:36:06.996 netconf/netconf.trace 0/0/CPU0 t1 TRC: nc_sm_session_close:6399 Closing IPC hndl: 1380c404
Mar 1 01:36:06.996 netconf-yfw/map.trace 0/0/CPU0 t1 TRC: yfw_map_transform_request:1314 ctx=1200bb6c,Start
Mar 1 01:36:06.996 netconf-yfw/map.trace 0/0/CPU0 t1 TRC: yfw_map_transform_request:1357 ctx=1200bb6c,Mapping not required for this request.
Mar 1 01:36:06.996 netconf-yfw/me.trace 0/0/CPU0 t1 DBG: me_session_destroy:21608 ctx=1200c204,session destroy ctx=1343d834
Mar 1 01:36:06.996 netconf-yfw/me.trace 0/0/CPU0 t1 DBG: me_session_destroy:21634 ctx=1200c204,Update session info: STOP
------------------

Thank you,
rouge

xthuijs · ‎03-01-2017

aha here is a clue:

Error, namespace is NULL, expected: urn:ietf:params:xml:ns:netconf:base:1.0

what happens when you reformat the query to:

]]>]]><?xml version="1.0" encoding="UTF-8"?>
<hello>
<capabilities>
<capability>urn:ietf:params:xml:ns:netconf:base:1.0</capability>
</capabilities>
</hello>]]>]]>

xander

rouge00rouge00rouge0 · ‎03-01-2017

Hi xthuijs,

I reformat to the above query, and the result dont change.
The message "Error, namespace is NULL, expected: urn:ietf:params:xml:ns:netconf:base:1.0" is shown again.

Mar  2 03:47:37.956 netconf-yfw/processor.trace 0/0/CPU0 t1  TRC: yfw_req_session_stop:502 ctx=1200a8bc,ses=12440504,op=12,session stop success, removed session-id=3541972957
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_rcv_eom:4326 EOM received, data len: 151
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_rcv_eom:4327 Received data (len:151): '<?xml version="1.0" encoding="UTF-8"?>
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  <hello>
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  <capabilities>
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  <capability>urn:ietf:params:xml:ns:netconf:base:1.0</capability>
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  </capabilities>
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  </hello>'
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  ERR: nc_sm_hello_validate:3028 Error, namespace is NULL, expected: urn:ietf:params:xml:ns:netconf:base:1.0
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  ERR: nc_sm_rcv_eom:4332 Hello message validation failed
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  ERR: nc_ssh_decode_cb:573 Callback handling decoded data returned error: 'Netconf server' detected the 'warning' condition 'NC_ERRCODE_REQ_INVALID'
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  ERR: nc_sm_pxs_readable_msg_handle:5873 Decoding of incoming NETCONF data failed: 'Netconf server' detected the 'warning' condition 'NC_ERRCODE_REQ_INVALID'
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  ERR: nc_sm_pxs_readable_handle:5934 Failed to handle SSH IPC message: 'Netconf server' detected the 'warning' condition 'NC_ERRCODE_REQ_INVALID', msg:1343c384, session:1342d6ec
Mar  2 03:47:37.956 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_session_find_session_id:1405 Found session 3541972957 1342d6ec
Mar  2 03:47:37.956 netconf-yfw/me.trace 0/0/CPU0 t1  DBG: me_session_destroy:21608 ctx=1200c204,session destroy ctx=1343d834
Mar  2 03:47:37.956 netconf-yfw/map.trace 0/0/CPU0 t1  TRC: yfw_map_transform_request:1314 ctx=1200bb6c,Start
Mar  2 03:47:37.956 netconf-yfw/map.trace 0/0/CPU0 t1  TRC: yfw_map_transform_request:1357 ctx=1200bb6c,Mapping not required for this request.
Mar  2 03:47:37.966 netconf-yfw/bk.trace 0/0/CPU0 t1  TRC: me_bk_sysdb_bag_cache_flush:3794 ctx=12016780,Flushing bag cache.
Mar  2 03:47:37.966 netconf-yfw/bk.trace 0/0/CPU0 t1  TRC: me_bk_sysdb_pack_cache_flush:1327 ctx=12016780,Flushing pack cache.
Mar  2 03:47:37.966 netconf-yfw/bk.trace 0/0/CPU0 t1  DBG: sysdb_backend_session_drop:1561 ctx=12016780,SysDB backend session dropped (134296d0).
Mar  2 03:47:37.966 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_session_close:6399 Closing IPC hndl: 13834afc
Mar  2 03:47:37.966 netconf-yfw/me.trace 0/0/CPU0 t1  DBG: me_session_destroy:21634 ctx=1200c204,Update session info: STOP
Mar  2 03:47:38.896 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_pxs_ipc_notify_callback_fn:315 IPC_NOTIFY_CLOSE
Mar  2 03:47:38.896 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_pxs_notify_callback_fn:6171 Client 13834afc closed connection
Mar  2 03:47:38.896 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_pxs_notify_callback_fn:6174 Session matching with IPC client handle 13834afc was already removed
Mar  2 03:47:38.896 netconf/netconf.trace 0/0/CPU0 t1  TRC: nc_sm_session_pxs_find:1443 No sessions stored in sessions hashmap

Thanks,

rouge

xthuijs · ‎03-02-2017

hi rouge,

I tried a few things also and ran into some issues that I investigated with our netconf dev group. This is the outcome:

Netconf-xml agent : supports only netconf v1.0, MDA schema model based

Netconf-yang agent: supports only netconf v1.1, YANG model based (but YANG generated from MDA schema)

you can find the schema's if you go into the ksh and go cd /pkg/schema and /pkg/yang

A proper hello message to start a session and It would be hard to test netconf manually. There are several tools available to test netconf-yang agent for instance python based. I'll also see if I can share some test tools that we may have here from our dev-test that can be shared.

cheers!

xander

rouge00rouge00rouge0 · ‎03-03-2017

Hi xthuijs,

Oh, we can use two kinds of NETCONF for XR.
I had used Netconf-yang agent, and I understood it is hard to test manually.

I'm waiting you'll share some test-tools.
I also search test-tools python based that can control Netconf-yang.

Thanks,
rouge

xthuijs · ‎03-06-2017

hi rouge,

good news, norio from our development team focussing on netconf whom I had been speaking with on this posted a client to use here:

https://github.com/nnakamot/netconf_client

I have asked him to watch this thread in case you have follow up questions or need more support in case the associated readme doesnt provide for all the answers :)

have a look at this and let us know how it rolls :)

cheers

xander

rouge00rouge00rouge0 · ‎03-07-2017

Hi xthuijs,

I downloaded this tools, and tried to send netconf with this.

As a result, it succeed to connect NETCONF.

I can show running-config, and edit configs with this tool.

I learned how to use in reading the help and using it.

Thank you very much for your help!!

Thanks again,

rouge

xthuijs · ‎03-08-2017

ah great rouge!! thanks for letting me know!! have fun :)

cheers!

xander

NETCONF to IOS-XR