i want to ask about configuring LDP or RSVP in MPLS network.
i know that RSVP is used for MPLS TE, as LDP doesn't support TE, but should i use LDP for normal MPLS labeling and labels to be assigned for each and every entry in routing table , and use RSVP in same time as using LDP just for MPLS TE .??
or if i use RSVP from the start and not configure LDP , will RSVP by default generate labels as LDP ..or if i use RSVP i have to configure and create LSP tunnels for every network manually or does this happen automatically as it goes with LDP ??
RSVP is primarily used for signalling & reserving the end-to-end bandwidth. In MPLS-TE environment one can either use CR-LDP (Constrained based Routed LDP) or RSVP to reserve the bandwidth / setup the tunnel. Cisco chose to use RSVP for various reasons.
Simply LDP, is used for labelling the packets that will traverse through the MPLS network. So, in your case if you setup a MPLS network it has to use LDP for exchanging labels ( or TDP if you have complete Cisco network ).
My understanding is that RSVP has been extended to support label distribution for MPLS. Does Cisco not support label distribution with RSVP as well as TE with RSVP? Therefore, couldn't RSVP be used for label distribution and TE, with no need for LDP?
