How to Accurately Monitor Network Device Metrics with Zabbix SNMP

System Environment

Zabbix 4.4, Huawei S7706, H3C S6520-16S‑SI.

Network Device Monitor Metrics

Metrics collected: CPU, Memory, Fans, Network interfaces, Temperature, optical power.

Network Config

Recommend using

snmp-agent

with an ACL to allow only specific addresses for data collection.

<code>snmp-agent
snmp-agent acl 2000
snmp-agent sys-info version v2c
snmp-agent community read cipher public</code>

snmpwalk Config

Zabbix uses the SNMP protocol to gather data via

snmpwalk

.

<code># Find package name
yum provides snmpwalk
# Install
yum -y install net-snmp-utils
# Verify installation
rpm -qa | grep snmp
# Example usage
snmpwalk -v 2c -c public <ip_address>
snmpwalk -v 2c -c public <ip_address> ifDescr
snmpwalk -v 2c -c public <ip_address> system</code>

H3C Metrics OID

<code>#CPU
1.3.6.1.4.1.25506.2.6.1.1.1.1.6
#Memory
1.3.6.1.4.1.25506.2.6.1.1.1.1.8
#Fans
1.3.6.1.4.1.25506.2.6.1.1.1.1.19
#Temperature
1.3.6.1.4.1.25506.2.6.1.1.1.1.12
#Optical power RX
1.3.6.1.4.1.25506.2.70.1.1.1.12
#Optical power TX
1.3.6.1.4.1.25506.2.70.1.1.1.9
#Power status
1.3.6.1.4.1.25506.2.6.1.1.1.1.19</code>

Huawei Metrics OID

<code>#CPU
1.3.6.1.4.1.2011.5.25.31.1.1.1.1.5
#Memory
1.3.6.1.4.1.2011.5.25.31.1.1.1.1.7
#Fans
1.3.6.1.4.1.2011.5.25.31.1.1.10.1.7
#Temperature
1.3.6.1.4.1.2011.5.25.31.1.1.1.1.11
#Optical power RX
1.3.6.1.4.1.2011.5.25.31.1.1.3.1.8
#Optical power TX
1.3.6.1.4.1.2011.5.25.31.1.1.3.1.9</code>

Zabbix Configuration

Add hosts and apply the Huawei and H3C templates.

Set custom macro

{$SNMP_COMMUNITY}=public

.

Automatic discovery interval defaults to 1 h; adjust as needed to avoid excessive load.

Port Traffic Summary

Example items for received and sent traffic aggregation:

<code>last("net.if.in[ifHCInOctets.9]") + last("net.if.in[ifHCInOctets.10]")
last("net.if.out[ifHCOutOctets.9]") + last("net.if.out[ifHCOutOctets.10]")</code>

Network Device Port Optical Power Monitoring

OID for H3C optical power (RX/TX) and example

snmpwalk

commands:

<code># RX power
snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.4.1.25506.2.70.1.1.1.9
# TX power
snmpwalk -v 2c -c public 192.168.1.1 1.3.6.1.4.1.25506.2.70.1.1.1.12</code>

LLD Template for Specific Ports

Use low‑level discovery to monitor only uplink ports (e.g., 1/0/27, 1/0/28) and reduce alarm noise.

Zabbix SNMP Port Traffic Accuracy Issue

32‑bit counters overflow at 4 GB, causing false drops; switch to 64‑bit counters (

ifHCInOctets

/

ifHCOutOctets

) to obtain correct traffic.

<code># 32‑bit OIDs
.ifInOctets .1.3.6.1.2.1.2.2.1.10
.ifOutOctets .1.3.6.1.2.1.2.2.1.16
# 64‑bit OIDs
.ifHCInOctets .1.3.6.1.2.1.31.1.1.1.6
.ifHCOutOctets .1.3.6.1.2.1.31.1.1.1.10</code>

Template Modules

Template Module Interfaces Simple SNMPv2 (32‑bit) and Template Module Interfaces SNMPv2 (64‑bit) are available for use.