Cisco IOS – An interface whose trunk encapsulation is “Auto” can not be configured to “trunk” mode.
KB ID0001167 Problem If you try and change a ports status, to make it a trunk port, you may see this error; Petes-Switch(config-if)#switchport mode trunk Command rejected: An interface whose trunk encapsulation is “Auto” can not be configured to “trunk” mode. Trunk Settings I don’t know if this is a throwback to when we had ISL trunking and 802.1q, but you need to specify the encapsulation before you can...
Cisco IOS – Setting Up DHCP Scopes
KB ID 0001112 I usually only have to do this on very small sites, or occasionally on the test bench. Most of the time we will have a server sat doing DHCP. The procedure below was carried out on a router, but the procedure is the same for a catalyst switch. By default DHCP is disabled, you have to turn it on, then create a ‘dhcp pool.’ Petes-Router(config)#service dhcp Petes-Router(config)#ip dhcp pool DATA-VLAN-10 Then...
Manually Remove VMware Workstation?
KB ID 0000576 Problem Tried to upgrade my VMware Workstation Version 8 today, then my laptop has a BSOD with a NETIO.SYS error, I bought it back up again, and attempted to manually install the newer version. This failed with an obscure .msi error. Even running the installer for the older version would not help. Solution Rather than picking it out of the registry, you can run remove it by running the install .exe file with a...
vSphere Client cannot be installed on a Domain Controller
KB ID 0000968 Problem I tried to install the VI client on my test network and this happened; vSphere Client requires Windows XP SP2 or later. vSphere Client cannot be installed on a Domain Controller. Solution Well I’m not over the moon about that? Ive only got one permanent VM and it’s a DC? Who came up with this? What about sites who have a single DC on an ESX box? What are they going to do! Turns out its quite easy to...
Ubuntu – Managing Cisco Devices via Serial / Rollover Cable
KB ID 0000400 Problem A while back I ran though “Managing Cisco ASA devices via the ASDM with Ubuntu”, I prefer to work at command line, with a new firewall my only choice is via the console port, In a windows environment I can fire up Hyperterminal and I’m away. With Linux there a couple of things to do first. Solution Step 1 (Get the Serial / RS232 / COM Port working) As pictured above, this is being done on my...