VPLS Extends VLANs into MPLS-VPNS

Virtual Private LAN Service — Service for Virtual Private Networks

Now for the English “non-acronym” version, Virtual Private LAN Service allows customers to create VLANs (Virtual Local-Area Networks) in a metro network or global network using IP (Internet Protocol) MPLS (Multi-Protocol Label Switching) or VPNS (Virtual Private Network Service).

• First, it is easy-to-implement with plug-and-play installation.
• Next, LAN Switches are cheap.
• Third, VPLS provides very flexible BOD-bandwidth on demand options.
• Fourth, it is a great solution for same-city customers with many locations.

• First, it doesn’t grow or scale well to tens of sites and hundreds of users.
• Second, faster bandwidth doesn’t provide QoS or solve flooding of packets due to large applications.

• First, it scales or grows essentially infinitely for customers with domestic and global locations.
• Second, routing supports all kinds of IT systems new or legacy.
• Third routing provides higher security.

• First, there is a high cost with routing and routing will always be more expensive than switching.
• Second, routing is complex to manage.
• Third, routing requires very knowledgeable and technical staff.

I didn’t forget VPLS, just needed a minute to get through the basics. VPLS uses MPLS to provide the “seamless” connections for VPLS. Shown in the presentation is the IP packet before and with the MPLS “label” attached or “tagged” on as it was originally called. MPLS consists of four elements, label bits, experimental bits, a stack bit and TTL (Time-To-Live) bits, which indicate the number of Label Switch Routers passed. Shown here is the “multi-protocol” part of MPLS and how it works with the other major networking protocols such as ATM, Frame Relay, Ethernet and others.

• Extends LAN infrastructure easily
• Expands metro-net to global-net
• Migrates Frame Relay to MPLS
• Utilizes “pseudowire” approach
• Needs “mesh’ connections
• Connect call centers via SIP
• Provides DR for data centers
• Wants greater customer (less carrier) control
• Has multi- and broadcast traffic
• Building a CDN (Content Delivery Net)
• Building an overlay multi-carrier network.

Asynchronous Transfer Mode (ATM)	X
ATM is a �fast cell� - connection-oriented digital data communications transport protocol. It uses fixed length data �payload� of 48 bytes/octets (octet is the international term for byte) plus 5 octe...more

Session Initiation Protocol (SIP)	X
SIP is the real-time communication protocol for VoIP. SIP is a signaling protocol for Internet conferencing, telephony, presence, events notification (emergency calling) and instant messaging. SIP...more

Local Area Network (LAN)	X
There is much more to LANs to explain on a few words. Pleases refer to TECHtionary.com for a vast set of tutorials on this subject. LAN connections use 48-bit MAC addresses permanently fixed into th...more

Quality of Service (QoS)	X
This is an introduction to the planning for QoS and Service Level Agreements. Simply, your performance is QoS and the guarantee is the SLA. That is, if you are not receiving the desired QoS from your ...more

Multi-Protocol Label Switching (MPLS)	X
In a Provider Provisioned Virtual Private Network, there may be more than one label. To begin with, IP packets may have a number of labels or "tags" attached to them. MPLS is just one type of label....more

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