Cisco Licence Differences LAN-Lite / LAN Base / IP Base / IP Services
KB ID 0001270 Dtd 11/01/17 Problem Actually finding the answer to this question is far more challenging than it needs to be! As usual Cisco can change this on a whim so before you purchase any equipment it’s still a good policy to check on the feature navigator. Solution This is about the best reference I’ve found. Although anyone who can tell me what the correct Layer 2 differences between Enterprise Access and Complete...
Cisco IOS – How To Find VLAN IPs (SVI’s)
KB ID 0001258 Dtd 16/11/16 Problem If you have a complicated network, you can spend more time finding out how it’s configured, than actually doing any work on it! Today I had a client that needed some changes made on their LAN, I knew their name, and their network address, and common sense told me which of the core switches they were connected to. Solution A quick search on the client name told me what VRF they were in, and what...
Cisco IOS ‘Crypto’ Unrecognized Command?
KB ID 0001246 Dtd 15/10/16 Problem I was working on a Cisco 3750-G last week, and I was in the process of setting up SSH access. When I went to generate the crypto key and enable SSH, It fired an error at me. In fact it wouldn’t execute any crypto commands; Core-SW(config)#crypto ? % Unrecognized command Now I have seen this before, (but not for a while). You need to be running a K9 version of the code. A quick ‘show...
MAC OSX – SSH Error ‘No Matching Exchange Method Found’
KB ID 0001245 Problem I thought my RoyalTSX had broken today, I upgraded it a couple of weeks ago, and I upgraded to macOS Sierra version 10.12 the other day. After this, all my SSH sessions refused to connect with this error; Unable to negotiate with x.x.x.x port 22: no matching key exchange found. Their offer diffie-hellman-group1-sha1 Note: You may also see the following error; Unable to negotiate with x.x.x.x port 22: no...
Cisco Stacking 3750 Switches
KB ID 0001205 Dtd 17/06/16 Problem You can stack Cisco 3750-X Switches in groups of up to 9 switches, and they can then be managed as one switch. Here I’ve got 2 switches. Solution Removing 3750-X Switches Stack Configuration One of my switches had already been in a stack, so I needed to remove its stack configuration. It thought it was switch 4 in the stack so I issued the following commands; Switch(config)# no switch 4...
Device Boots to ROMMON (Cisco ASA)
KB ID 0001199 Dtd 01/06/16 Problem After recently picking up some second hand ASA5512-X firewalls, I went to run them up, and make sure they were ok, however on boot up they went straight to ROMMON like so; Use ? for help. rommon #0> Now I know what ROMMON is, it’s the base operating system of the device, its job is a bit like the BIOS on a PC, it locates and loads the operating system. The only time you should ever see a rommon...