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
On the test I will configure IP Unnumbered on Cisco Catalyst 6509E with firmware 12.2(33)SXJ7, on other switches the setup is similar.
IP Unnumbered is useful, for example, when it is necessary to divide a large network into several VLANs and use the same IP addresses and also to issue white IPs in any VLAN using one gateway.
Connect to the terminal device through the console, telnet or SSH.