Cisco switch management port interface The Cisco management port interface could be located at the back or front of the switch and has a yellow band around it like the picture below: It is a layer 3 (routed) port and…
Problem Are you getting this error message when connecting to a SSH Server from your MACOS? Unable to negotiate with x.x.x.x port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1 Solution Since the upgrade of El Capitan (10.11)…
Problem Getting this error message on popup on your Windows 7 PC? Windows has detected an IP address conflict or Duplicate IP Address 0.0.0.0 or The system has detected an address conflict for IP address 0.0.0.0 with the system having…
Problem If you ever run into the following error messages: %Error copying usbflash0:cat3k_caa-universalk9.SPA.03.06.04.E.152-2.E4.bin (Not enough space on device) or % flash: requires 295884 KB of free space, but only 167160 KB is available. Operation aborted. You’ve run out of disk…
Where did my “switchport access vlan 1” command go? Have you ever noticed that Cisco has loaded default configurations onto the switch without showing it on your startup or running config? “switchport access vlan 1” is a good example. Take…
Classic Firewall There are two configuration models to setup a firewall on IOS; the classic firewall (used to be called CBAC – Context based access control) and the zone based firewall. In this post I’m going to document how to…
Setting up Radius using the old IOS cli If you entered the following for setting up radius server, radius-server host 192.168.1.1 you will get the following warning message informing you that you there is a new way of configuring radius…
If you have a lot of Dolby Digital HD video content like myself and would like to Airplay that on your TV there’s an app out there called AirVideo HD that does the trick. How does Airvideo HD work? The…
Backing up a Cisco router or switch configuration is crucial for any network administrator. Wouldn’t it be useful if you could schedule an automatic configuration backup to an offline location? Or backup your configuration automatically to an offline location whenever…
Did you know you can backup your running-config or startup-config via ssh? I’ve been backing up configurations via TFTP for a long time but only recently started using SSH. Here’s how to do it. If you have a Linux/Unix server…