Once on a Cisco Catalyst 6509-E, I noticed that the SYSTEM LED on the WS-SUP720-3BXL is lit red.Continue reading “Red SYSTEM LED on SW-SUP720-3BXL”
In this article, I will describe the Cisco Catalyst 6500 online diagnostic commands.Continue reading “Online diagnostics Cisco Catalyst 6500”
Once after a power outage, on Cisco Catalyst 6509-E, instead of the main module WS-SUP720-3BXL, only the backup module was launched.
As I found out later, the memory card stopped working and, accordingly, the module could not start the firmware. At this moment on the module all the indicators glowed red.
I will give a short list of popular network emulators and network equipment:Continue reading “List of network and network equipment emulators”
In this article I will write how to configure SSH on Cisco.
Connect to the device via telnet or console cable and switch to the privileged mode:Continue reading “How to configure SSH on Cisco”
On the test I will configure Cisco Catalyst WS-C3750-48TS-S with firmware 12.2(55)SE3.Continue reading “Configuring Cisco Catalyst 3750”
I will use Cisco Catalyst 6509-E on the test.
To view the temperature of the sensors, connect via the console or telnet for example and execute the command:
Below is the list of SNMP OID that I used to create templates in Zabbix and other scripts.Continue reading “List of SNMP OID and MIB for Cisco”
Once on Cisco Catalyst 6509-E, when I collected an aggregation of three ports, traffic began to go through only two ports and a message appeared in the logs:Continue reading “Solution “Port is not compatible with aggregators in channel 1 and cannot attach to them””
On the test, I will upgrade the Cisco Catalyst WS-C2960-24TT-L switch.
And so, let’s connect to the switch and switch to elevated privilege mode:
Let’s see the active firmware version:
show version show boot