Tag: service provider
Cisco Layer 2 Tunneling
To a student of networking the OSI model can be a little hard to appreciate until its application is actually seen a few times in the real world. Likewise understanding that you can grab frames or packets and encapsulate them inside other higher layer protocols is also confusing to the newbie. An Ethernet pseudo-wire is […]
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!