If your new to VPC or Virtual Port Channel this is a simple article that outlines the basic overall configuration along with some terms. A VPC or Virtual Port Channel is the ability to bond together multiple switches, so that they appear as a single switch from...
FXO This quick little post was simply meant to clear up confusion that often surrounds the basics of FXO vs. FXS ports. Foreign Exchange Office or FXO interfaces are ports that receive the analog line. In most cases this usually consist of a single line phone or an...
An automatic 6to4 tunnel allows isolated IPv6 domains to be connected over an IPv4 network to other isolated IPv6 networks. One of the key difference between automatic 6to4 tunnels vs manually configured tunnels is that the tunnel itself is not a Point-to-Point, but...
The most basic requirement of any OSPF design is that all areas in an Open Shortest Path First ( OSPF ) system must be physically connected to the backbone 0. In some cases, where this is not possible, you can use a Virtual Link to connect broken areas or none...
Any Transport over MPLS Any Transport over MPLS or AToM in short is a method of encapsulating Layer 2 packets inside MPLS. Much like it’s cousin L2TPv3 it has the ability to transport any Layer 2 encapsulating such as PPP, Ethernet etc. AToM enables Service...
Layer 2 Tunnel Protocol Version 3 It’s a standards based Layer 2 VPN / IP based protocol governed by the IETF ( RFC 3931 ) working group current version 3 as the name implies. Basically it allows you to extend ( stretching ) your LAN across the WAN much in the...
Basically Dynamic Multipoint VPN or DMVPN is a method of building dynamically secure overlay networks on top of an unsecured medium such as the Internet. There are of course Pros and Cons when it comes to building networks across the Internet. A couple of major Cons...
The overall reliability or load of an interface at a given point in time can be measured by the txload/rxload a fractional ( 255/255 = 100% ) calculation over a default average of 5 minutes. This 5 minute time interval is the default on most if not all Cisco devices,...
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