Introduction to WAN Design with Frame Relay:
It is generally used for wide area network. It operates in two layers in the OSI model. It is mostly used by telecommunication network. It gives the speed from 56K (DS0) to 43Mbps (DS3) depending on the service provider. There are different terms used in the frame delay like :
- CIR (committed information rate)
- DCE (data circuit equipment)
- DTE (data terminal equipment)
- DLCI (data link connection identifier)
- HDLC (high level data link control protocol)
- LMI (line management interface)
- PPP ( point-to-point protocol)
- PVC (private virtual circuit)
First we have to purchase the service from frame delay provider. After purchasing we have to attach the point-to-point links (DTE to DCE) from available customer’s sites to cloud frame sites. Now PVC network has to be setup between the customer’s sites. These PVC endpoints can be identified with a data link connection identifier. Monitoring is done by using line management interface.
It is much cheaper than point-to-point connections for longer distances. If congestion on providers’ network takes place then this can destroy the throughput. It is also difficult to ensure the quality of service as compared to other protocols.
Mitigating:It used to determine our present needs and plans that will be best for us and that make a growth. It used to check the service agreements. Contracts given by the service provider is also checked by it. It also has the decision making capability, based on price and needs.
Redundant links: they are alternative that do not rely on Schaumburg site. They also examine business requirements to determine the best setup.
When these networks are designed correctly they can very cost effective network. This network is also very flexible.
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