[Netdot-devel] [Netdot - Bug #1913] (New) Naming method 'sysname' ignores sysname

r***@osl.uoregon.edu

2017-03-24 13:39:47 UTC

Issue #1913 has been updated by Brian Candler.

It matters because the topo graphs use "short_name", so all the devices are now labelled "fa0-1" or "fa1-0"...

----------------------------------------
Bug #1913: Naming method 'sysname' ignores sysname
https://osl.uoregon.edu/redmine/issues/1913#change-3387

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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