My Network Lab
Sharing my learning and personal experience in IT Networking.
Wednesday, September 3, 2025
Configure Cisco no service password-recovery
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The no service password-recovery is a security enhancement that prevents anyone with physical console access to perform router configuratio...
Friday, August 1, 2025
Deleting a Cisco File Directory
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Some older Cisco switches have limited flash memory and would require deleting large files such as an IOS/IOS-XE .bin to free up space. S...
Friday, July 4, 2025
Cisco Nexus Switch SFP Validation Failed Error
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I had to configure a Cisco Nexus 5K switch to be a trunk port and encountered an SFP validation failed error. I've checked the port is u...
Friday, June 6, 2025
Cisco 1100 Router Flex Ports
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The Cisco 1100 has a a built-in 8-port Layer 2 switch and the last two ports can be converted into a Layer 3 port. This feature is called F...
Sunday, May 4, 2025
Cisco ASR1K Policing QoS Configuration
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Here's a Cisco link which compares the QoS strategies that can be applied in a Cisco router. The legacy ISR command rate-limit is no l...
Tuesday, April 1, 2025
Password Recovery in a Cisco ASR920
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You can use PuTTY to send a Special Command such as Break when entering ROMMON mode in a Cisco router. Just right-click on the top area ...
Saturday, March 1, 2025
Cisco Nexus 9000 NX-OS Upgrade
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The Cisco Nexus 9000 (N9K) switch upgrade procedure was simplified compared to upgrading an older Nexus platform. You can use the Cisco Ne...
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