Vyacheslav

BDCOM. Adding a user with limited rights

One day I needed operators to be able to open the BDCOM OLT web interface, so I created a user with read-only access for them.

Setting up logs on Cisco Nexus

In this article I will give an example of setting up logs on Cisco Nexus switches.

Solution Unable to retrieve PJSIP transport in Asterisk

The error “Unable to retrieve PJSIP transport …” occurs when TRANSPORT does not exist or is specified incorrectly.

DSE7420MK2 ethernet port does not work after a thunderstorm

One day, after a thunderstorm, the Ethernet port in the DSE7420MK2 generator control module stopped working. The link appeared and disappeared, but at a distance of 10m the device was not accessible. If you connect with a short 1m cable, then sometimes it was available.

Zabbix ERROR 1273 (HY000) at line 483: Unknown collation: ‘utf8mb4_0900_ai_ci’

One day I was migrating a Zabbix server database to another server and an error occurred:

Setting up nftables

In this article I will give examples of setting up nftables to replace the outdated iptables.

Monitoring mdadm in Zabbix

I will give an example of simple monitoring of a mdadm software raid in Zabbix.

Solution for heavy CPU load MikroTik CRS106-1C-5S

One day I was asked to look at MikroTik CRS106-1C-5S, whose users could not use the Internet normally, there was no speed and ping requests dropped out. When I looked at CPU utilization, it was almost 100% (in the menu System – Resources).

Can’t open PID file /run/zabbix/zabbix_server.pid (yet?) after start: No such file or directory

Once, on Ubuntu 18.04.6 LTS, I updated the Zabbix server to version 6.0 LTS and the new version did not start.

Configuring BGP on Juniper MX – traffic balancing

I will give an example of setting up eBGP on Juniper MX204 with several uplinks and balancing traffic between them.