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.
Continue reading “Taskset – bind process to CPU cores”Author Archives: Vyacheslav
Solution channel-group command failed: port not compatible Duplex Mode
Once on Cisco Nexus I met errors of this type:
Continue reading “Solution channel-group command failed: port not compatible Duplex Mode”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:
Continue reading “Juniper. How to clear Alarm Host 0 fxp0 : Ethernet Link Down”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.
Continue reading “Increase the port range net.ipv4.ip_local_port_range”Clearing Loganalyzer History
In this article, I’ll show you how to clear outdated logs from Loganalyzer.
Continue reading “Clearing Loganalyzer History”Juniper. monitor traffic examples
The “monitor traffic” command allows you to view the packets or their headers that pass through the routing module, which is very useful for diagnosing various problems.
Continue reading “Juniper. monitor traffic examples”Cisco Nexus SNMP OID for Transceiver
Once I needed to monitor the optical signal level on the Cisco Nexus C3064PQ-10GX to prevent cable sagging, stretching and signal loss, because in this case the signal deteriorates gradually, usually I monitor the signal on the end equipment, but I came across an old BDCOM 3310B model in which there was no support DDM.
Continue reading “Cisco Nexus SNMP OID for Transceiver”1C Unknown error (SMTP error code 3)
One day I was informed that the accounting department on one of the computers could not send invoices by email.
Continue reading “1C Unknown error (SMTP error code 3)”Setting up BIRD logs
In this article, I will give examples of setting up logs in BIRD.
How to set up RPZ in Bind9 (site blocking)
In this article, I will give a simple example of setting up RPZ in Bind9.
RPZ (Response Policy Zone) allows you to block access to malicious and prohibited sites by domain name, IP address or network, block DNS servers.