MPLS

by | May 15, 2012 | Routing

MPLS is a packet forwarding technology which uses labels to make data forwarding decisions. Originally developed by Cisco and was referred to as Tagged Switching, and was later adopted by the IETF and renamed MPLS. With MPLS, the Layer 3 header analysis is done just...

Site to Site Encryption

by | Mar 31, 2012 | Cryptography, Routing, Tunneling

In most real world situation Site to Site VPN Tunnels are usually created between a pair Firewalls, however that is not the only way to achieve secure Site to Site encryption. For that matter one method is just as good as the other. It all depends on your situation...

Building Community

by | Aug 18, 2011 | Routing

Basically a community or communities allow for the grouping of prefixes that share a common set of principles utilizing transitive BGP attribute. These attribute consists of a set of four octet values that specify a community. The attribute values are encoded with an...

PVLANS

by | Jul 25, 2011 | Switching

Private VLAN or PVLAN often used by Service Providers partitions the Layer 2 broadcast domain of a VLAN into subdomains, allowing you to isolate the ports on the switch from each other. A subdomain consists of a primary VLAN and one or more secondary VLANs. All VLANs...

DDR

by | Jun 15, 2011 | Routing

Dial On Demand Routing or DDR provides a redundant link or network connection over a Public Switched Telephone Networks or PSTN. This could as simple as an Asynchronous dial up modem connection to a more reliable connection such as ISDN. Basically its a connection in...