By default on cisco router labels are generated for each and every route. So when you use the command “mpls ldp advertise-label” it means it will advertise all the labels to its adjacent neighbours. But in actual neighbours require only the labels for loopbacks which are being used for MP-BGP. So there is no requirement to advertise all the labels. For saving the overhead we can advertise the labels only for the loopback addresses by using an acl “mpls ldp advertise-label for mpls_acl”.
regards
shivlu jain
Tuesday, January 13, 2009
Which Labels Cisco Router Advertise To Its Neighbors
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