I have an assignment in which I have to form the LIBs for the LSRs based on specific LSPs. My question is the following: I have two LSPs that have the same Destination IP Addresses, different Source IP Addresses and the second one uses the same last two LSRs as the first one.
The first LSP is the following: R1, R3, R2, R5 (Source IP: 150.100.1.0/24, Destination IP: 170.100.1.0/24)
The second LSP is the following: R2, R5 (Source IP: 160.100.1.0/24, Destination IP: 170.100.1.0/24)
When I do the LIB for R5, I end up with two different registers that have the same Destination Address, Input Interface, Output Interface, Output Label (it actually does not exist since R5 is the Egress Router for both these LSPs), but different Input Labels. Is this possible? Shouldn't Input Labels be the same since the Destination IP Address is the same? From what I know, Labels have local significance, so Source IP does not play a role here.
