---> Routing Table is built once we enable IGP protocol like OSPF, IS-IS, EIGRP.
---> Label Switch Router will assign label for each network which is present in the routing table and then share the labels with other router.
---> Other LSR routers will receive the information from all the routers using LDP protocol and then they will build LFIB Table( Label Forwarding Information Base).
--> Whenever any packet comes on PE router it will check LFIB for Label Lookup.
---> For each and every directly connected network the router will assign implicit label ( Label 3)
---> Pen Ultimate Hop Popping is method of reducing double lookup on egress router
---> To check LFIB or MPLS Forwarding Table
# sh mpls forwarding-table
---> Label Switch Router will assign label for each network which is present in the routing table and then share the labels with other router.
---> Other LSR routers will receive the information from all the routers using LDP protocol and then they will build LFIB Table( Label Forwarding Information Base).
--> Whenever any packet comes on PE router it will check LFIB for Label Lookup.
---> For each and every directly connected network the router will assign implicit label ( Label 3)
---> Pen Ultimate Hop Popping is method of reducing double lookup on egress router
---> To check LFIB or MPLS Forwarding Table
# sh mpls forwarding-table
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