IT Blog

Configuring OSPF in BIRD

In this article, I will give an example of configuring OSPF in BIRD.

How to run Zabbix-agent as root

I once added user options to the Zabbix agent configuration and they needed to access files that could only have root permissions, so I had to run Zabbix-agent as root.

Renaming Network Interfaces in Linux

Once, after updating the i40e driver for Intel network adapters, I noticed that the names of the network interfaces had changed, and after rebooting the operating system, the names also periodically changed.

Script to bind Intel NIC interrupts to processor cores

I will give the script code from Intel to bind interrupts of Intel network adapters to processor cores, and also show examples of its use:

Installing and configuring BIRD (BGP)

For example, I will install BIRD on Ubuntu Server 20.04 and show an example of configuring BGP.

Taskset – bind process to CPU cores

By default, processes use all the processor cores, but sometimes it is necessary to release the 0 core, which is usually the most loaded, or assign some processes only to the second CPU, etc., in this case, taskset will help.

Solution channel-group command failed: port not compatible Duplex Mode

Once on Cisco Nexus I met errors of this type:

Juniper. How to clear Alarm Host 0 fxp0 : Ethernet Link Down

One day while configuring the Juniper MX204, I noticed that the Alarm indicator on the front panel was lit red, and looking at the list of alarms, I found the following:

Increase the port range net.ipv4.ip_local_port_range

There is a possibility that on a highly loaded server, such as a proxy or router, with a very large number of connections, free ports in the allocated range may run out, so you need to look at the current number used and, if necessary, increase the net.ipv4.ip_local_port_range value.

Clearing Loganalyzer History

In this article, I’ll show you how to clear outdated logs from Loganalyzer.