Explicit Tunnel || MPLS LDP & MPLS-TE RSVP

Hi @Khalid_Gul,
1) As in explicit tunnel we manually configured like next hop then how traffic will switch to the backup path?
======Generally, you can configure the tunnel protection group to bind a working tunnel and standby tunnel, so that the traffic would switch to the backup tunnel while the working tunnel fails. For the detailed configuring guides, please refer to https://support.huawei.com/enterprise/en/doc/EDOC1100177252/e6720393?idPath=24030814

2)if we configured an explicit tunnel then it will choose one path? (no need to check constraints) then it means the same as LDP static.
=====Well, in terms of results, I would say yes, the explicit path is quite similar to the LDP static tunnel. But they are different essentially. The explicit path is part of the dynamic MPLS TE tunnel, it is used for the tunnel constraints. Though it can set a forwarding path, it is not an independent method.

3)RSVP will choose one best path & our Link bandwidth is 30Mbps then how 50Mbps traffic will forward?
======If the available bandwidth for the traffic is the whole link bandwidth, the traffic will be forwarded at a 30Mbps rate. That is the strict or physical restriction. The rest of part traffic will be dropped.

1) As if we configured explicit TE Tunnel from Router A to D through Router E if link b/w E & D down then traffic will drop? means not switch to another path?
======That depends. If you have the alternative path, the traffic will be forwarded in the backup path.


2)What is the difference b/w Static LSP & Explicit TE Tunnel,?
===Explict path is part of the RSVP-TE Tunnel, while the static lsp requires the administrator configure the whole path.


3) Suppose each link in the below topology are 30Mb Bandwidth if Router A wants to send 50Mb traffic to router C then what will be the solution through



a) RSVP-TE?

b) Explicit Tunnel?

c) LDP?
===I think both could work. How to setup a tunnel does not affect the path bandwidth.