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Today's Topics:
1. [Netdot - Bug #1904] Cannot start apache2 with Netdot::Mason
([email protected])
2. [Netdot - Bug #1911] (New) Mysql error: "Can't get last
insert id" ([email protected])
3. [Netdot - Bug #1912] (New) Mysql error: "Data truncated for
column 'physaddr'" ([email protected])
4. [Netdot - Bug #1911] Mysql error: "Can't get last insert id"
([email protected])
5. [Netdot - Bug #1904] Cannot start apache2 with Netdot::Mason
([email protected])
6. [Netdot - Bug #1913] (New) Naming method 'sysname' ignores
sysname ([email protected])
----------------------------------------------------------------------
Message: 1
Date: Fri, 24 Mar 2017 04:28:25 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1904] Cannot start apache2 with
Netdot::Mason
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1904 has been updated by Brian Candler.
FYI, I had some other problems under 16.04 which I'm documenting here in case
they are helpful to anyone else.
(1) Trying to add a device via the web interface failed. No UDP packets sent,
and I see:
<pre>
SNMP::Info::_validate_autoload_method(sysServices) Unable to resolve method.
SNMP::Info::_validate_autoload_method(sysDescr) Unable to resolve method. <both
again>
Device::_get_snmp_session: Cannot connect to 100.68.100.254. Tried communities:
xxxxxxxx
</pre>
Cause: permissions on /etc/snmp/snmp.conf which were
<pre>
# ls -l /etc/snmp/snmp.conf
-rw-r----- 1 root snmp 2454 Mar 21 13:47 /etc/snmp/snmp.conf
</pre>
and hence not readable to www-data. Fixed by chmod +r.
(2) Mysql error "Can't get last insert id". I will raise separate ticket for
this.
----------------------------------------
Bug #1904: Cannot start apache2 with Netdot::Mason
https://osl.uoregon.edu/redmine/issues/1904#change-3384
Author: Dracula Lai
Status: New
Priority: High
Assignee:
Category:
Target version:
Resolution:
Followed the installation instruction up to the point of linking
/etc/apache2/conf-enabled/netdot.conf.
Apache2 version is Apache/2.4.18 running on Ubuntu 16.04
Other versions are mod_apreq2-20090110/2.8.0 mod_perl/2.0.9 Perl/v5.22.1
The 'service apache2 restart' will be failed with the following error:
# systemctl status apache2.service
??? apache2.service - LSB: Apache2 web server
Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
????apache2-systemd.conf
Active: failed (Result: exit-code) since Fri 2016-08-05 11:19:00 HKT; 31min
ago
Docs: man:systemd-sysv-generator(8)
Process: 21374 ExecStop=/etc/init.d/apache2 stop (code=exited,
status=0/SUCCESS)
Process: 21520 ExecStart=/etc/init.d/apache2 start (code=exited,
status=1/FAILURE)
Aug 05 11:18:39 monitor systemd[1]: Stopped LSB: Apache2 web server.
Aug 05 11:18:39 monitor systemd[1]: Starting LSB: Apache2 web server...
Aug 05 11:18:39 monitor apache2[21520]: * Starting Apache httpd web server
apache2
Aug 05 11:18:40 monitor apache2[21520]: AH00558: apache2: Could not reliably
determine the server's fully qualified domain name, us
Aug 05 11:19:00 monitor apache2[21520]: *
Aug 05 11:19:00 monitor apache2[21520]: * The apache2 instance did not start
within 20 seconds. Please read the log files to disco
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Control process exited,
code=exited status=1
Aug 05 11:19:00 monitor systemd[1]: Failed to start LSB: Apache2 web server.
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Unit entered failed state.
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Failed with result
'exit-code'.
The problem has been trimmed down that it stops when it calls the 'use
Netdot::Mason;' in the netdot.conf
Anyway to solve this problem?
The make testdeps is fine as follows:
# make testdeps
Testing for required Perl modules
/usr/bin/perl bin/perldeps.pl test
RRDs..............................................ok
GraphViz..........................................ok
Module::Build.....................................ok
CGI...............................................ok
Class::DBI........................................ok
Class::DBI::AbstractSearch........................ok
Apache2::Request..................................ok
HTML::Mason.......................................ok
Apache::Session...................................ok
URI::Escape.......................................ok
SQL::Translator...................................ok
SNMP::Info 2.06...................................ok
NetAddr::IP 4.042.................................ok
Apache2::AuthCookie...............................ok
Apache2::SiteControl..............................ok
Log::Dispatch.....................................ok
Log::Log4perl.....................................ok
Parallel::ForkManager.............................ok
Net::Patricia 1.20................................ok
Authen::Radius....................................ok
Test::Simple......................................ok
Net::IRR..........................................ok
Time::Local.......................................ok
File::Spec........................................ok
Net::Appliance::Session...........................ok
BIND::Config::Parser..............................ok
Net::DNS..........................................ok
Text::ParseWords..................................ok
Carp::Assert......................................ok
Digest::SHA.......................................ok
Net::DNS::ZoneFile::Fast..........................ok
Socket6...........................................ok
XML::Simple.......................................ok
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------------------------------
Message: 2
Date: Fri, 24 Mar 2017 04:34:32 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1911] (New) Mysql error: "Can't
get last insert id"
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1911 has been reported by Brian Candler.
----------------------------------------
Bug #1911: Mysql error: "Can't get last insert id"
https://osl.uoregon.edu/redmine/issues/1911
Author: Brian Candler
Status: New
Priority: Normal
Assignee:
Category:
Target version:
Resolution:
(Netdot 1.0.7, ubuntu 16.04, mysql)
Problem: "Can't get last insert id" when trying to insert device, either from
web interface or CLI.
<pre>
# /usr/local/netdot/bin/updatedevices.pl -H 100.68.100.254 -I -c NetManage
...
INFO - Inserting new Device: 100.68.100.254
ERROR: Error while inserting Device: Can't insert new Device: Can't get last
insert id at /usr/local/netdot/bin/updatedevices.pl line 199.
at /usr/local/netdot/bin/updatedevices.pl line 199.
</pre>
After cranking up debugging in etc/Site.conf:
<pre>
log4perl.category.Netdot::Model = DEBUG, Syslog
log4perl.category.Netdot::Model::Device = DEBUG, Syslog
</pre>
then I get:
<pre>
DEBUG - vtp-cndo.ws.nsrc.org type is: Server
INFO - Inserting new Device: 100.68.100.254
DEBUG - Device::insert: Device 2 already exists in DB as vtp-cndo.ws.nsrc.org
WARN - Device::assign_snmp_target: vtp-cndo.ws.nsrc.org: Could not insert
snmp_target address: 100.68.100.254: Error while inserting Ipblock: Can't
insert new Ipblock: Can't get last insert id at
/usr/local/netdot/lib/Netdot/Model/Device.pm line 5693.
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5693.
DEBUG - vtp-cndo.ws.nsrc.org does not provide a valid base MAC. Using first
available interface MAC.
DEBUG - vtp-cndo.ws.nsrc.org: Could not insert base MAC: 5254004378F9: Error
while inserting PhysAddr: Can't insert new PhysAddr: Can't get last insert id
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5665.
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5665.
DEBUG - vtp-cndo.ws.nsrc.org: No suitable base MAC found
ERROR: Error while inserting Asset: Can't insert new Asset: DBD::mysql::st
execute failed: Cannot add or update a child row: a foreign key constraint
fails (`netdot`.`asset`, CONSTRAINT `fk_physaddr_1` FOREIGN KEY (`physaddr`)
REFERENCES `physaddr` (`id`)) [for Statement "INSERT INTO asset (physaddr,
product_id, reserved_for)
VALUES (?, ?, ?)
" with ParamValues: 0=2, 1='1', 2=undef] at
/usr/share/perl5/DBIx/ContextualFetch.pm line 52.
at /usr/local/netdot/bin/updatedevices.pl line 199.
</pre>
It's clear the id column is defined correctly as autoincrement:
<pre>
mysql> desc physaddr;
+------------+--------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra
|
+------------+--------------+------+-----+---------------------+----------------+
| address | varchar(128) | NO | UNI | NULL |
|
| first_seen | timestamp | NO | MUL | 1970-01-02 00:00:01 |
|
| id | bigint(20) | NO | PRI | NULL | auto_increment
|
| last_seen | timestamp | NO | MUL | 1970-01-02 00:00:01 |
|
| static | tinyint(1) | NO | | 0 |
|
+------------+--------------+------+-----+---------------------+----------------+
5 rows in set (0.00 sec)
</pre>
And indeed in each case the insert has actually been successful (e.g. the
device was inserted with id 2), so when I re-run the updatedevices.pl script it
gets a bit further (finding the existing device, existing MAC address, existing
asset, existing interface etc)
Aside: I think there's another bug here. Netdot isn't doing its updates within
a transaction, or is not rolling back the transaction on exception, and I think
it should.
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------------------------------
Message: 3
Date: Fri, 24 Mar 2017 04:44:51 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1912] (New) Mysql error: "Data
truncated for column 'physaddr'"
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1912 has been reported by Brian Candler.
----------------------------------------
Bug #1912: Mysql error: "Data truncated for column 'physaddr'"
https://osl.uoregon.edu/redmine/issues/1912
Author: Brian Candler
Status: New
Priority: Normal
Assignee:
Category:
Target version:
Resolution:
Continuing after 1911, I get this:
<pre>
INFO - vtp-cndo.ws.nsrc.org: SNMP target address set to 100.68.100.254
DEBUG - vtp-cndo.ws.nsrc.org does not provide a valid base MAC. Using first
available interface MAC.
DEBUG - vtp-cndo.ws.nsrc.org: Using existing 5254004378F9 as base bridge address
DEBUG - vtp-cndo.ws.nsrc.org: Old Ifs: 1, New Ifs: 18
DEBUG - vtp-cndo.ws.nsrc.org: Old IPs: 0, New IPs: 34
DEBUG - vtp-cndo.ws.nsrc.org: Interface with number 1 found
DEBUG - vtp-cndo.ws.nsrc.org: Interface 1 (lo) updated
DEBUG - vtp-cndo.ws.nsrc.org [lo]: IP 0000:0000:0000:0000:0000:0000:0000:0001
is a loopback. Skipping.
DEBUG - Error while inserting PhysAddr: Can't insert new PhysAddr: Can't get
last insert id at /usr/local/netdot/lib/Netdot/Model/Interface.pm line 445.
at /usr/local/netdot/lib/Netdot/Model/Interface.pm line 445.
ERROR: Error while inserting Interface: Can't insert new Interface:
DBD::mysql::st execute failed: Data truncated for column 'physaddr' at row 1
[for Statement "INSERT INTO interface (bpdu_filter_enabled, bpdu_guard_enabled,
neighbor_fixed, doc_status, dp_remote_id, overwrite_descr, monitored,
admin_status, speed, dp_remote_ip, auto_dns, loop_guard_enabled, device,
snmp_managed, monitorstatus, name, root_guard_enabled, neighbor_missed,
description, dp_remote_type, dp_remote_port, oper_status, ignore_ip, type,
number, physaddr)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
?, ?)
" with ParamValues: 0=0, 1=0, 2=0, 3='snmp', 4=undef, 5=1, 6=0, 7='up', 8=0,
9=undef, 10='1', 11=0, 12='1', 13=1, 14='3', 15='br-cnd11', 16=0, 17=0,
18=undef, 19=undef, 20=undef, 21='up', 22=0, 23='ethernet-csmacd', 24='10',
25='86638C52BF8F'] at /usr/share/perl5/DBIx/ContextualFetch.pm line 52.
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 6252.
</pre>
This is wrong. interface.physaddr is defined as a BIGINT(30) column and should
contain the physaddr *id* not the MAC address itself.
Looks like this is a cascading error:
- something went wrong when inserting the physaddr
- instead of aborting, it blindly carried on
- it decided to use the MAC address instead of the physaddr id
I think I can see what's happening: in sub snmp_update
(lib/Netdot/Model/Interface.pm), all the values from @$info->{$field}@ are
copied to @$iftmp{$field}@, which this includes @$info->{physaddr}@
But this is not reset on error:
<pre>
$iftmp{physaddr} = $physaddr->id if $physaddr;
</pre>
I think should be instead:
<pre>
$iftmp{physaddr} = $physaddr ? $physaddr->id : undef;
</pre>
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------------------------------
Message: 4
Date: Fri, 24 Mar 2017 05:07:15 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1911] Mysql error: "Can't get
last insert id"
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1911 has been updated by Brian Candler.
Turns out this is a known issue with Class::DBI and mysql 5.7:
https://rt.cpan.org/Public/Bug/Display.html?id=118491
That includes a patch you can make to @/usr/share/perl5/Class/DBI.pm@, and I
can confirm this fixes the problem.
Ubuntu has Class::DBI 3.0.17 which is the latest - from October 2007! It seems
that Class::DBI is abandonware :-(
----------------------------------------
Bug #1911: Mysql error: "Can't get last insert id"
https://osl.uoregon.edu/redmine/issues/1911#change-3385
Author: Brian Candler
Status: New
Priority: Normal
Assignee:
Category:
Target version:
Resolution:
(Netdot 1.0.7, ubuntu 16.04, mysql)
Problem: "Can't get last insert id" when trying to insert device, either from
web interface or CLI.
<pre>
# /usr/local/netdot/bin/updatedevices.pl -H 100.68.100.254 -I -c NetManage
...
INFO - Inserting new Device: 100.68.100.254
ERROR: Error while inserting Device: Can't insert new Device: Can't get last
insert id at /usr/local/netdot/bin/updatedevices.pl line 199.
at /usr/local/netdot/bin/updatedevices.pl line 199.
</pre>
After cranking up debugging in etc/Site.conf:
<pre>
log4perl.category.Netdot::Model = DEBUG, Syslog
log4perl.category.Netdot::Model::Device = DEBUG, Syslog
</pre>
then I get:
<pre>
DEBUG - vtp-cndo.ws.nsrc.org type is: Server
INFO - Inserting new Device: 100.68.100.254
DEBUG - Device::insert: Device 2 already exists in DB as vtp-cndo.ws.nsrc.org
WARN - Device::assign_snmp_target: vtp-cndo.ws.nsrc.org: Could not insert
snmp_target address: 100.68.100.254: Error while inserting Ipblock: Can't
insert new Ipblock: Can't get last insert id at
/usr/local/netdot/lib/Netdot/Model/Device.pm line 5693.
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5693.
DEBUG - vtp-cndo.ws.nsrc.org does not provide a valid base MAC. Using first
available interface MAC.
DEBUG - vtp-cndo.ws.nsrc.org: Could not insert base MAC: 5254004378F9: Error
while inserting PhysAddr: Can't insert new PhysAddr: Can't get last insert id
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5665.
at /usr/local/netdot/lib/Netdot/Model/Device.pm line 5665.
DEBUG - vtp-cndo.ws.nsrc.org: No suitable base MAC found
ERROR: Error while inserting Asset: Can't insert new Asset: DBD::mysql::st
execute failed: Cannot add or update a child row: a foreign key constraint
fails (`netdot`.`asset`, CONSTRAINT `fk_physaddr_1` FOREIGN KEY (`physaddr`)
REFERENCES `physaddr` (`id`)) [for Statement "INSERT INTO asset (physaddr,
product_id, reserved_for)
VALUES (?, ?, ?)
" with ParamValues: 0=2, 1='1', 2=undef] at
/usr/share/perl5/DBIx/ContextualFetch.pm line 52.
at /usr/local/netdot/bin/updatedevices.pl line 199.
</pre>
It's clear the id column is defined correctly as autoincrement:
<pre>
mysql> desc physaddr;
+------------+--------------+------+-----+---------------------+----------------+
| Field | Type | Null | Key | Default | Extra
|
+------------+--------------+------+-----+---------------------+----------------+
| address | varchar(128) | NO | UNI | NULL |
|
| first_seen | timestamp | NO | MUL | 1970-01-02 00:00:01 |
|
| id | bigint(20) | NO | PRI | NULL | auto_increment
|
| last_seen | timestamp | NO | MUL | 1970-01-02 00:00:01 |
|
| static | tinyint(1) | NO | | 0 |
|
+------------+--------------+------+-----+---------------------+----------------+
5 rows in set (0.00 sec)
</pre>
And indeed in each case the insert has actually been successful (e.g. the
device was inserted with id 2), so when I re-run the updatedevices.pl script it
gets a bit further (finding the existing device, existing MAC address, existing
asset, existing interface etc)
Aside: I think there's another bug here. Netdot isn't doing its updates within
a transaction, or is not rolling back the transaction on exception, and I think
it should.
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------------------------------
Message: 5
Date: Fri, 24 Mar 2017 05:08:30 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1904] Cannot start apache2 with
Netdot::Mason
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1904 has been updated by Brian Candler.
Mysql error "Can't get last insert id" is issue #1911. Ubuntu 16.04 comes with
mysql-5.7, but Class::DBI has not been updated to work with it.
----------------------------------------
Bug #1904: Cannot start apache2 with Netdot::Mason
https://osl.uoregon.edu/redmine/issues/1904#change-3386
Author: Dracula Lai
Status: New
Priority: High
Assignee:
Category:
Target version:
Resolution:
Followed the installation instruction up to the point of linking
/etc/apache2/conf-enabled/netdot.conf.
Apache2 version is Apache/2.4.18 running on Ubuntu 16.04
Other versions are mod_apreq2-20090110/2.8.0 mod_perl/2.0.9 Perl/v5.22.1
The 'service apache2 restart' will be failed with the following error:
# systemctl status apache2.service
??? apache2.service - LSB: Apache2 web server
Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
????apache2-systemd.conf
Active: failed (Result: exit-code) since Fri 2016-08-05 11:19:00 HKT; 31min
ago
Docs: man:systemd-sysv-generator(8)
Process: 21374 ExecStop=/etc/init.d/apache2 stop (code=exited,
status=0/SUCCESS)
Process: 21520 ExecStart=/etc/init.d/apache2 start (code=exited,
status=1/FAILURE)
Aug 05 11:18:39 monitor systemd[1]: Stopped LSB: Apache2 web server.
Aug 05 11:18:39 monitor systemd[1]: Starting LSB: Apache2 web server...
Aug 05 11:18:39 monitor apache2[21520]: * Starting Apache httpd web server
apache2
Aug 05 11:18:40 monitor apache2[21520]: AH00558: apache2: Could not reliably
determine the server's fully qualified domain name, us
Aug 05 11:19:00 monitor apache2[21520]: *
Aug 05 11:19:00 monitor apache2[21520]: * The apache2 instance did not start
within 20 seconds. Please read the log files to disco
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Control process exited,
code=exited status=1
Aug 05 11:19:00 monitor systemd[1]: Failed to start LSB: Apache2 web server.
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Unit entered failed state.
Aug 05 11:19:00 monitor systemd[1]: apache2.service: Failed with result
'exit-code'.
The problem has been trimmed down that it stops when it calls the 'use
Netdot::Mason;' in the netdot.conf
Anyway to solve this problem?
The make testdeps is fine as follows:
# make testdeps
Testing for required Perl modules
/usr/bin/perl bin/perldeps.pl test
RRDs..............................................ok
GraphViz..........................................ok
Module::Build.....................................ok
CGI...............................................ok
Class::DBI........................................ok
Class::DBI::AbstractSearch........................ok
Apache2::Request..................................ok
HTML::Mason.......................................ok
Apache::Session...................................ok
URI::Escape.......................................ok
SQL::Translator...................................ok
SNMP::Info 2.06...................................ok
NetAddr::IP 4.042.................................ok
Apache2::AuthCookie...............................ok
Apache2::SiteControl..............................ok
Log::Dispatch.....................................ok
Log::Log4perl.....................................ok
Parallel::ForkManager.............................ok
Net::Patricia 1.20................................ok
Authen::Radius....................................ok
Test::Simple......................................ok
Net::IRR..........................................ok
Time::Local.......................................ok
File::Spec........................................ok
Net::Appliance::Session...........................ok
BIND::Config::Parser..............................ok
Net::DNS..........................................ok
Text::ParseWords..................................ok
Carp::Assert......................................ok
Digest::SHA.......................................ok
Net::DNS::ZoneFile::Fast..........................ok
Socket6...........................................ok
XML::Simple.......................................ok
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------------------------------
Message: 6
Date: Fri, 24 Mar 2017 05:23:21 -0700
From: [email protected]
Subject: [Netdot-devel] [Netdot - Bug #1913] (New) Naming method
'sysname' ignores sysname
To: [email protected], [email protected]
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Issue #1913 has been reported by Brian Candler.
----------------------------------------
Bug #1913: Naming method 'sysname' ignores sysname
https://osl.uoregon.edu/redmine/issues/1913
Author: Brian Candler
Status: New
Priority: Normal
Assignee:
Category:
Target version:
Resolution:
Here is a device with a valid sysName:
<pre>
# snmpwalk -v2c -c NetManage 100.68.100.235 sysName
SNMPv2-MIB::sysName.0 = STRING: transit1.nren.ws.nsrc.org
</pre>
This is what I want the device to be known as in Netdot.
The forward DNS matches its SNMP IP:
<pre>
# dig +short transit1.nren.ws.nsrc.org
100.68.100.235
</pre>
But the reverse DNS points to a more detailed name (including the interface).
<pre>
# dig +short -x 100.68.100.235
fa0-0.transit1.nren.ws.nsrc.org.
# dig +short fa0-0.transit1.nren.ws.nsrc.org
100.68.100.235
</pre>
Site.conf has:
<pre>
DEVICE_NAMING_METHOD_ORDER => [ 'sysname', 'snmp_target' ],
</pre>
Therefore I was expecting it to take the Netdot device name from the sysName.
But when I add the device, it uses the reverse DNS for the target address
instead.
<pre>
# /usr/local/netdot/bin/updatedevices.pl -H 100.68.100.235 -I -c xxxxxxxx
...
SNMP::Info::specify() - Changed Class to SNMP::Info::Layer3::Cisco.
DEBUG - SNMPv2 session with host 100.68.100.235 established
DEBUG - Device::get_snmp_info: SNMP target is 100.68.100.235
...
DEBUG - Device::get_snmp_info: Finished getting SNMP info from 100.68.100.235
DEBUG - Device::discover: Device 100.68.100.235 does not yet exist
DEBUG - Device::_get_main_ip: Trying method sysname
DEBUG - Device::_get_main_ip: Chose 100.68.100.235 using naming method: sysname
DEBUG - Device::assign_name: 100.68.100.235 resolves to
fa0-0.transit1.nren.ws.nsrc.org
INFO - Inserted new RR: fa0-0.transit1.nren.ws.nsrc.org
</pre>
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------------------------------
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