MPLS Is A
Networking Technology That Uses Labels To Identify Paths, Rather Than Network
Addresses.
MPLS Can
Improve Performance, Scalability, Security, And Reliability Of Networks.
MPLS Is Used
In A Variety Of Applications, Including Enterprise Networks, Carrier Networks,
And The Internet Backbone.
Here Are Some Of The
Key Benefits Of MPLS:
Improved Performance
MPLS Can
Reduce The Amount Of Processing Required To Route Packets, Which Can Improve
Performance.
Increased
Scalability
MPLS Can Be
Easily Scaled To Support A Large Number Of Devices.
Enhanced Security
MPLS Can Be
Used To Create Secure Vpns.
Improved Reliability
MPLS Can
Provide Better Reliability By Providing Multiple Paths For Data Traffic.
PROCESS OF MPLS WORK
MPLS DOESN'T NOT EXCHANGE LABELS AUTOMATICALLY.
LDP IS A PROTOCOL THAT AUTOMATICALLY GENERATES AND EXCHANGES
LABELS BETWEEN ROUTERS.
EACH ROUTER WILL LOCALLY GENERATE LABELS FOR ITS PREFIXES
AND WILL THEN ADVERTISE THE LABEL VALUES TO ITS NEIGHBORS.
IT'S A STANDARD, BASED ON CISCO'S PROPRIETARY TDP (TAG
DISTRIBUTION PROTOCOL).
LIKE MANY OTHER PROTOCOLS,
LDP FIRST ESTABLISHES A NEIGHBOR ADJACENCY BEFORE IT
EXCHANGES LABEL INFORMATION. IT WORKS A BIT DIFFERENT THAN MOST PROTOCOLS
THOUGH...
FIRST WE SEND UDP MULTICAST HELLO PACKETS TO DISCOVER OTHER
NEIGHBORS. ONCE TWO ROUTERS DECIDE TO BECOME NEIGHBORS, THEY BUILD THE NEIGHBOR
ADJACENCY USING A TCP CONNECTION.
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