Archives
- August 2020 (1)
- October 2019 (2)
- September 2018 (1)
- June 2018 (1)
- April 2018 (3)
- January 2018 (2)
- December 2017 (3)
- August 2017 (2)
- July 2017 (1)
- February 2017 (1)
- January 2017 (5)
- September 2016 (2)
- January 2016 (1)
- November 2015 (1)
- September 2015 (2)
- October 2014 (1)
- April 2014 (1)
- March 2014 (2)
- December 2013 (1)
- November 2013 (1)
- October 2013 (3)
- September 2013 (2)
- July 2013 (3)
- May 2013 (2)
- March 2013 (2)
- February 2013 (2)
- January 2013 (1)
- December 2012 (5)
- November 2012 (5)
- October 2012 (4)
- September 2012 (3)
- August 2012 (7)
- July 2012 (8)
- June 2012 (2)
- May 2012 (2)
- April 2012 (4)
- March 2012 (1)
- January 2012 (1)
- December 2011 (1)
- November 2011 (1)
- October 2011 (2)
- September 2011 (1)
- August 2011 (3)
- July 2011 (4)
Tag Archives: IOS
802.1Q Tunneling AKA QinQ
You are probably familiar with VLAN tagging on switch trunks and how it can be used to separate physical infrastructures into multiple logical networks. With the explosive growth of Metro Ethernet connections the ability of site to site layer two connections has now become common. It’s easy for organizations to implement as network admins are already familiar with Ethernet as a LAN protocol. The setup is simple for the customer but a bit more configuration is needed on the service provider’s side if the customer desires VLAN tagged traffic to flow over the site to site link. Lets take a look! Continue reading
Archive Cisco Configuration Changes on the Cheap
I enjoy solving problems on a shoe string budget with next to no resources. Well… not really. But, because I work with small businesses from time to time that often is the main design requirement. Another design requirement that often doesn’t fall in line with “cheap” is disaster recovery. Fortunately I was able to talk the clients into Cisco gear at one point in the past. I’m about to show you why. Continue reading
Cisco Two or More IP Addresses
I wanted to take an opportunity to share an experience I had recently and explain how I resolved it. The situation I walked into was quite ugly. A small consulting firm had helped install some new switches at a medium sized business. They basically did a rip and replace. Before the replacement the network was configured with four VLANs; One VLAN for IP cameras, IP Phones, a few isolated APs, and of course corporate PC data. The bad news was that the fly-by-night consulting firm had a tech on this job that knew nothing about VLANs. Can you see the … Continue reading
Keeping Time on Cisco IOS
When doing any type of troubleshooting I am big on log files. To get the most out of your log files, however, you need the time stamps to be accurate. For time stamps to be accurate you need to ensure your systems are all running with exactly the same time Continue reading
Posted in Networking Tagged cisco, configuration, IOS, logging, networking, trouble shoot Leave a comment
Our RSS Feed