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...

Route Maps

by | Jun 15, 2011 | Routing

Route maps provide a way to logically make decision regarding routes using similar logic found in programming such as IF, THEN, ELSE. A single Route Map has one or more commands in sequential order based on sequence numbers. Each Route Map command has an underlying...

Route Summarization

by | Apr 7, 2011 | Routing

Route Summarization is basically the act or process of reducing the overall number of routes in a given routing table. In large networks with thousands or even hundreds of thousands of routes the burden on the Routers CPU can become quite significant. With most...

RIP Database

by | Mar 17, 2011 | Routing

RIP is a distance-vector routing protocol, that’s limited by it’s hop count. The maximum number of hops allowed for RIP is 15. This hop limit however also limits the size of networks that RIP can support. RIP is well suited as an IGP in that it has no...

IEEE

by | Jan 27, 2011 | Routing, Switching

The term 802.3 is an IEEE standard or specification for Ethernet, a method of physical communication in a local area network or LAN. The Institute of Electrical and Electronics Engineers or IEEE is the governing body which maintains the standards. In general the 802.3...