Cisco IOS – Enabling LLDP
Mar08

Cisco IOS – Enabling LLDP

KB ID 0001289  Problem If you’re running Cisco IOS on all you devices then you can use CDP  to see what’s directly connected, (unless you are on a Cisco firewall, but I did say IOS devices).  Petes-Switch#show cdp neighbors Capability Codes: R – Router, T – Trans Bridge, B – Source Route Bridge S – Switch, H – Host, I – IGMP, r – Repeater, P – Phone, D – Remote, C...

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Cisco Licence Differences LAN-Lite / LAN Base / IP Base / IP Services
Jan11

Cisco Licence Differences LAN-Lite / LAN Base / IP Base / IP Services

KB ID 0001270  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 Access are,...

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Cisco IOS – How To Find VLAN IPs (SVI’s)
Nov16

Cisco IOS – How To Find VLAN IPs (SVI’s)

KB ID 0001258  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 VLAN they...

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Cisco IOS ‘Crypto’ Unrecognized Command?

KB ID 0001246 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 version’...

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Cisco Stacking 3750 Switches
Jun16

Cisco Stacking 3750 Switches

KB ID 0001205  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 provision...

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Device Boots to ROMMON (Cisco ASA)
Jun01

Device Boots to ROMMON (Cisco ASA)

KB ID 0001199  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 prompt...

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