Category Archives: Switching

The Cisco 3650 stacking module. Not really a module.

If you ever have asked yourself the question “How can I tell if my 3650 has a stacking module installed?” or “what commands shows if there is stacking module installed“. Those questions will be addressed in this post. The short answer is: Unless the switch is already stacked with another switch and you can verify […]

Copy ftp from within specific VRF on Cisco IOS

When trying to copy something, like software, from a FTP-server, you are not able to specify source IP or interface which may be troublesome. You can however configure your router to use a specific IP/VLAN as source. cisco# configure terminal cisco(config)# ip ftp username myusername cisco(config)# ip ftp password mypassword cisco(config)# ip ftp source-interface vlan […]

Cisco DOM – Digital Optical Monitoring and does cleaning your fiber cables make any difference?

Cisco has intercorperated monitoring of optical interfaces a while back, but what is relatively new is that the DOM-support is the new default mGBIC from Cisco. You can recognize the DOM-support by the model name GLC-LH-SMD and GLC-SX-MMD (Notice the D at the end). Have a look at this link to view full list of […]

My first post – a little story about old equipment and vlans

I was called out to a customers who had an issue with surfing the web at one particular location of their network which was connected by fiber. We were quite confused by the issue as apparently smaller website without much content, such as google.com, would load without any issue – while bigger websites like newspapers […]