SNMP item based on another item

[yau]

I try to find a solution for the following:
Get the upload port for Switches.

what I already achieved:
1. Get information about upload port from ARP table:
discovery rule:

discovery[{#UPLINKMAC},.1.3.6.1.2.1.4.22.1.2]

2. Get MAC Address as Element prototype:

.1.3.6.1.2.1.4.22.1.2.{#SNMPINDEX}

Unfortunately the OID .1.3.6.1.2.1.4.22.1.1 gives the VLAN and not the port number.

The port nuber can be found at the translation table .1.3.6.1.2.1.17.4.3.1.2.<Uplink MAC as Dec>

3. I alredy transformed the MAC into decimals by a depending item and a javascript
Uplink MAC as Dec:

some js code

Can I create an SNMP item, which uses the value of the Item .1.3.6.1.2.1.17.4.3.1.2.<Uplink MAC as Dec> ?
Example for MAC 01 02 03 04 05 06: .1.3.6.1.2.1.17.4.3.1.2.1.2.3.4.5.6 = INTEGER: 26

Or any other idea, how to get the number of the uplink port?

[MrLoop]

Hello, in this case, the OID is directly linked to the device, so it is not possible to create an OID on it unless you have access to the device code. What you can do is to identify better is to use snmpwalk.

On the same zabbix server, install snmp:

(Debian)
apt-get install snmp snmpd

(RedHat)
yum install snmp

Run the snmp command to see how it is:

snmpwalk -c public -v2c device_ip

Confirme que você terá resultados SNMP

Instalar o snmp downloader

(Debian)

apt-get instalar snmp-mib-downloader

SNMPWALK -C Público -V2C device_ip



Este pacote snmp-mibs-downloader traduz as identificações para você, permitindo uma leitura mais dinâmica. Talvez isso o ajude a chegar onde deseja.

[yau]

Thx for the proposal. I would avoid, to run on the zabbix server several hundred snmpwalk requests per period by script. Any other idea?

[MrLoop]

You can do the SNMP with "grep" argument to do

Example:

snmpwalk -c public -v 2c host_ip | grep number_of_OID

[icycler1]

I achieved something very similar to this by getting the Mac address to interface assignment for all connected devices.
See the following post: https://www.zabbix.com/forum/zabbix-...s-and-switches.

You can likely apply the same logic under the scope of just the uplink ports listed by CDP neighbors or LLDP info rather than the whole mac address table.

In a different solution I have,
For just getting the distant end Interface leading to my switch I do a preprocessing step of snmp walk value: 1.3.6.1.4.1.9.9.23.1.2.1.1.7.{#SNMPINDEX}.

Eventually my goal is to combine my two solutions and maintain a dashboard that I can search a mac address and immediately list its interface, as well as list all uplink and downlink ports.