Recent changes to netdisco2

#235 error request to GET /ajax/content/report/moduleinventory crashed: core

Oliver Gorwits — Sat, 22 Apr 2017 07:34:31 -0000

Hi Jim. This ticket has been moved here: https://github.com/netdisco/netdisco/issues/239

If you still have the issue, I think the next step may require you sharing your database with me so that I can implement a fix. If this is not possible (no surprise) then we might be stuck. Thanks to your investigation, I suspect a limitation in the CSV handling code which is not really part of Netdisco itself.

Oliver.

#285 SNMPv3 multi config issue

Nicolas Matsunaga — Fri, 30 Dec 2016 14:26:09 -0000

Hi Oliver,

Thanks for your quick response.

I updated to version 2.034001 and did the DB schema update

I also did a very minor modificaction in order to know which snmp_auth tag was being checked

$ diff /home/netdisco/perl5/lib/perl5/App/Netdisco/Util/SNMP.pm SNMP.pm.orig
141c141
< : "v3user:$comm->{user}:$comm->{auth}->{proto}/$comm->{priv}->{proto}" );

  : "v3user:$comm->{user}" );

The device A.B.C.D (I masquerade real addresses) has SHA/DES configuration
Here we can see that the 4 SNBMPv3 configurations failed and the error message " could not SNMP connect to A.B.C.D" is displayed

[netdisco@itmetromy ~]$ ~/bin/netdisco-do discover -d A.B.C.D -D
[9159] 2016-12-30 14:14:09 info App::Netdisco version 2.034001 loaded.
[9159] 2016-12-30 14:14:10 info discover: started at Fri Dec 30 11:14:10 2016
[9159] 2016-12-30 14:14:10 debug [A.B.C.D] try_connect with ver: 3, class: SNMP::Info, comm: v3user:itmetro:MD5/DES
[9159] 2016-12-30 14:14:10 debug [A.B.C.D] try_connect with ver: 3, class: SNMP::Info, comm: v3user:itmetro:MD5/AES
[9159] 2016-12-30 14:14:10 debug [A.B.C.D] try_connect with ver: 3, class: SNMP::Info, comm: v3user:itmetro:SHA/AES
[9159] 2016-12-30 14:14:10 debug [A.B.C.D] try_connect with ver: 3, class: SNMP::Info, comm: v3user:itmetro:SHA/DES
[9159] 2016-12-30 14:14:10 debug [A.B.C.D] try_connect with ver: 2, class: SNMP::Info, comm: <hidden>
[9159] 2016-12-30 14:14:13 debug [A.B.C.D] try_connect with ver: 1, class: SNMP::Info, comm: <hidden>
[9159] 2016-12-30 14:14:16 debug [A.B.C.D] try_connect with ver: 2, class: SNMP::Info, comm: <hidden>
[9159] 2016-12-30 14:14:19 debug [A.B.C.D] try_connect with ver: 1, class: SNMP::Info, comm: <hidden>
[9159] 2016-12-30 14:14:22 info discover: finished at Fri Dec 30 11:14:22 2016
[9159] 2016-12-30 14:14:22 info discover: status error: discover failed: could not SNMP connect to A.B.C.D

In the next test, I edited deployment.yml and change the order of the 4 SNMPv3 configurations, placing SHA/DES as the first one.

I rerun the discover operation and we can see that now it works.

[netdisco@itmetromy ~]$ ~/bin/netdisco-do discover -d A.B.C.D -D
[13586] 2016-12-30 14:18:06 info App::Netdisco version 2.034001 loaded.
[13586] 2016-12-30 14:18:06 info discover: started at Fri Dec 30 11:18:06 2016
[13586] 2016-12-30 14:18:06 debug [A.B.C.D] try_connect with ver: 3, class: SNMP::Info, comm: v3user:itmetro:SHA/DES
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] try_connect with ver: 3, new class: SNMP::Info::Layer3::Cisco, comm: v3user:itmetro:SHA/DES
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 10.104.214.30
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 10.10.17.9
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 10.232.0.1
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.137.16
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 154.0.99.178
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 10.10.17.1
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 154.0.19.106
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 10.10.17.5
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.127.2
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.C.D1
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.137.13
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.127.1
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as 20.20.20.2
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.C.D
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - aliased as A.B.137.17
[13586] 2016-12-30 14:18:07 debug resolving 15 aliases with max 50 outstanding requests
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - removed 0 aliases
[13586] 2016-12-30 14:18:07 debug [A.B.C.D] device - added 15 new aliases
[13586] 2016-12-30 14:18:08 debug [A.B.C.D] interfaces - removed 0 interfaces
[13586] 2016-12-30 14:18:08 debug [A.B.C.D] interfaces - added 959 new interfaces
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] vlans - removed 0 device VLANs
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] vlans - added 0 new device VLANs
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] vlans - removed 0 port VLANs
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] vlans - added 0 new port VLANs
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] power - 0 power modules
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] modules - removed 0 chassis modules
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] modules - added 205 new chassis modules
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] neigh - setting manual topology links
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] neigh - adding neighbor A.B.137.1, type [N7K-C7009], on GigabitEthernet0/0/0 to discovery queue
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] neigh - adding neighbor A.B.C.D2, type [cisco ASR1004], on GigabitEthernet0/0/1 to discovery queue
[13586] 2016-12-30 14:18:09 debug [A.B.C.D] neigh - adding neighbor A.Z.82.98, type [Cisco 2821], on GigabitEthernet0/0/2 to discovery queue
[13586] 2016-12-30 14:18:09 info discover: finished at Fri Dec 30 11:18:09 2016
[13586] 2016-12-30 14:18:09 info discover: status done: Ended discover for A.B.C.D

Thanks in advance and Happy New Year,
Nicolás

#285 SNMPv3 multi config issue

Oliver Gorwits — Fri, 30 Dec 2016 11:31:07 -0000

status: new --> taken
assigned_to: Oliver Gorwits

#285 SNMPv3 multi config issue

Oliver Gorwits — Fri, 30 Dec 2016 11:30:54 -0000

Hi Nicolas,

There may be one or two different bugs here. However at least one of them, related to removal of entries in the "community" table that you discovered, has been fixed in a very recent version of Netdisco (2.034001). Therefore please would you upgrade and then re-test, and we can find out whether there's also another issue with multiple SNMPv3 configs?

https://metacpan.org/pod/App::Netdisco#Upgrading-from-2.x

Many thanks, and sorry you tripped over this,

Oliver.

SNMPv3 multi config issue

Nicolas Matsunaga — Thu, 29 Dec 2016 23:52:53 -0000

I have been using Netdisco 2.033002 successfuly with a single community on SNMPv2.
We had to migrate to v3 for obvious security reasons.
Because not all the devices supported the same desired config (SHA/AES), we have 4 combinations
MD5/DES, MD5/AES, SHA/DES, SHA/AES with the same authentication password and encription password

The problem is this:
when a I issue a manual discover it fails. I have tried debug (-D) and packet sniffing

[netdisco@server ~]$ ~netdisco/bin/netdisco-do discover -d X.X.X.X
[9409] 2016-12-29 20:05:09 info App::Netdisco version 2.033002 loaded.
[9409] 2016-12-29 20:05:09 info discover: started at Thu Dec 29 17:05:09 2016
[9409] 2016-12-29 20:05:46 info discover: finished at Thu Dec 29 17:05:46 2016
[9409] 2016-12-29 20:05:46 info discover: status error: discover failed: could not SNMP connect to X.X.X.X

It only works if the first of 4 SNMPv3 is the one of the device configurations on ~/environments/deployment.yml
Once it works, it continues to works because it is stored on DB on the community table

I think I found a bug. When I delete device, the corresponding entry on the community table is not deleted.

I think I have traced down the error in the /home/netdisco/perl5/lib/perl5/App/Netdisco/Util/SNMP.pm
to the function _try_read, but I am not a PERL programmer. I believe that after the first unsuccesful attempt, some variable might be holding a value that causes to fail the right credentials.

SNMPv3 multi config issue

Nicolas Matsunaga — Thu, 29 Dec 2016 23:52:53 -0000

Ticket 285 has been modified: SNMPv3 multi config issue
Edited By: Oliver Gorwits (olly_g)
Status updated: u'new' => u'taken'
Owner updated: None => u'olly_g'

SNMPv3 multi config issue

Nicolas Matsunaga — Thu, 29 Dec 2016 23:52:53 -0000

Ticket 285 has been modified: SNMPv3 multi config issue
Edited By: Oliver Gorwits (olly_g)
Status updated: u'taken' => u'moved-to-github'

Use vis.js as L2 topology visualization engine

Max Kosmach — Tue, 15 Nov 2016 19:58:22 -0000

Is it possible to use vis.js (http://visjs.org/) for visualising L2 topology?
Vis.js is dual licensed under both Apache 2.0 and MIT.

Use vis.js as L2 topology visualization engine

Max Kosmach — Tue, 15 Nov 2016 19:58:22 -0000

Ticket 284 has been modified: Use vis.js as L2 topology visualization engine
Edited By: Oliver Gorwits (olly_g)
Status updated: u'new' => u'moved-to-github'

#260 Avaya 48xx switches device modules fails

Jansen Robert — Mon, 17 Oct 2016 15:56:02 -0000

Some info: found here IMHO:
https://blog.michaelfmcnamara.com/2013/07/avaya-ethernet-routing-switch-4800-part-2/