Setup RANCID and ViewVC (Part One)
Jul21

Setup RANCID and ViewVC (Part One)

KB ID 0001331 Dtd 19/07/17 Problem There are couple of good posts out there on setting up Rancid (Really Awesome New Cisco Config Differ). Some even show you how to set it up with ViewVC (Formally ViewVCS, basically a nice web based GUI front end, that does version control and highlights differences). It does this using a system called CVS (Concurrent Version System, hence the original name.) Then I had to do some more searching to...

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Cisco – Joining Layer 2 Networks Over Layer 3 Networks
May22

Cisco – Joining Layer 2 Networks Over Layer 3 Networks

KB ID 0001313 Dtd 22/05/17 Problem It’s a common problem, you want to connect one site to another and still have them on the same layer 2 network. As you can see above both the routers at the bottom are in the 172.16.1.0/24 network, let’s assume they are clients in the same layer 2 network how would you connect them? Solution Option 1: xconnect over L2TP All the ‘heavy lifting’ is done on the SiteA and SiteB...

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Cisco IOS – Enabling LLDP
Mar08

Cisco IOS – Enabling LLDP

KB ID 0001289 Dtd 08/03/17 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 - CVTA, M - Two-port Mac Relay Device ID Local...

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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¬†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...

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Cisco ASA EZVPN (Revisited)
Nov23

Cisco ASA EZVPN (Revisited)

KB ID 0001261 Dtd 24/11/16 Problem EZVPN is a technology that lets you form an ISAKMP/IPSEC VPN tunnel from a site with a dynamically assigned IP (EZVPN Client,) back to a device with a static IP (EZVPN Server). I’ve called this EZVPN revisited, because this is a technology I’ve talked about¬†before. So why am I here again? Well back then I used the ASDM. If you do that now, you need to go in and mess about with things to...

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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 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...

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