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21
Discovery / Re: skip polling one or more devices
« Last post by dohco on December 05, 2018, 03:29:45 PM »
Quick and dirty;
Change SNMP community on the devices so NeDi can't read the device.
If the CPU goes down then it's most likely related to SNMP.
Does the time when NeDi scan your network correspond with high CPU on the device?

/Conny


22
Discovery / SNMP v3 with AES or DES but with same community name
« Last post by ghermant on December 04, 2018, 04:57:09 PM »
Hello,

We have some devices that were configured to use SNMP v3 with AES encryption and some other older devices with DES.

For both of these devices, we used the same community name and the only difference between them is the encryption method (AES or DES).

I found an issue in Nedi (1.7) that does not allow to have both of these SNMP communities defined in the nedi.conf file.

Like this:
#           name   aprot   apass      pprot   ppass
comm   mycomm   sha           ver3pa55           aes           ver3pa55
comm   mycomm   sha           ver3pa55           des           ver3pa55

If I test the above config for a discovery on a DES device, it fails and Nedi do not even test the second community.
It looks like Nedi considers the second one using AES as the same one as the DES one.

It is even worst as this look also that the encryption method is not stored in the database and associated to a device:
If a device were discovered using DES but the nedi.conf file contains the AES one, refreshing the device fails as it read the encryption method indicated in the nedi.conf file.

Would you know how to update the libsnmp.pl lib so that Nedi first test in AES and fallback in DES if needed or store this parameter by device in the DB?

Thanks & Brgds,
GaŽl
23
Discovery / Re: skip polling one or more devices
« Last post by healy@bnl.gov on December 03, 2018, 11:07:17 PM »
We're debugging high aggregate cpu threshold alarms on a couple of devices and considered stopping NeDi's polling as a"debugging step".  We are not at this time thinking that nedi is the cause; its one of many other servers polling the network.  Thanks for the feedback!  -bob
24
Installation / Re: Error update Nedi 1.6 to 1.7C
« Last post by tristanbob on December 03, 2018, 06:40:06 PM »
Good catch Remo!  I did need to change the ownership of the /var/nedi directory.  Here is what I did to fix this:

Code: [Select]
sudo chown -R www-data:www-data /var/nedi
And then I followed your instructions to update Nedi using the web-interface.  IT WORKED! 

Thanks for making such an awesome piece of software.  :)

Tristan
25
Discovery / Re: Howto discover nodes in VLAN's
« Last post by starrag on December 03, 2018, 08:15:14 AM »
Hi,
i have tried that, but no success. If a watch the log, i can see the following errors:

 DisProtocol ------------------------------------------------------------------ Mon Dec 3 08:09:16 2018
SNMP:Connect 10.200.255.46 public v2 Tout:7s MaxMS:4095 Retry:1 NB:0
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.
Use of uninitialized value $x in hash element at /var/nedi/inc/libsnmp.pm line 2166.

Best Regards
Markus
26
Discovery / Re: skip polling one or more devices
« Last post by rickli on December 02, 2018, 12:02:45 PM »
-SX skips any device found in the DB and only attempts to discover unkown ones. This is ideal to find new devices in large networks (e.g. ARP cache fo routers).

You can exclude devices from monitoring (maintenance mode), but not the discovery. Do you have any particular reason for this?
27
Discovery / Re: Exclude Nodes from LAG Interfaces?
« Last post by rickli on December 02, 2018, 11:56:58 AM »
Does the lastseen timestamp still get updated on those nodes? When you add debugging (-db), you should see lines like this:

DBG :$mc on $if vl$vl ignored due to NOP
28
Discovery / Re: Howto discover nodes in VLAN's
« Last post by rickli on December 02, 2018, 11:51:03 AM »
Newer XOS versions should support Q-bridge MIB. Have you tried changing this in the .def?
29
Installation / Re: Error update Nedi 1.6 to 1.7C
« Last post by rickli on December 02, 2018, 11:47:56 AM »
The pkg file is around 4MB? The nedi folder itself belongs to www-data as well?
30
Discovery / skip polling one or more devices
« Last post by healy@bnl.gov on November 30, 2018, 03:37:10 PM »
either temporarily or permanently - how to exclude a device (or several) from getting polled.  Not sure of the semantics of "nedi.pl -S X=existing dev" - can there be multiple "X=" entries? or is this not the way; then what is the way?
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