The MPLS WG Archive

["Toni Jackob" <tonijackob@hotmail.com>]

Hi All.

I'm new with the LDP Protocol and I have some questions. I hope that someone 
can help me out.

1)

Topology:

LSR-A If_a1   1.2.1.1 ----------- If_b1 1.2.1.2 LSR-B
       If_a2  1.2.2.1 -----------  If_b2  1.2.2.2

·LDP adjacencies are created over the two parallel links between the two 
LSRs.
·One LDP session is established between the LSRs, which work in Global Label 
Space. The session is using the first link.
·LSR-B advertises a label for prefix 1.1.1.1/32 to LSR A.

My question is, does LSR-B should support the advertised label in HW level 
over both interfaces, or only over the interface that the TCP session is 
using?

2)
When LSR needs to decide about to next hop of a FEC, does it take into 
account the next hop interface or only the next hop address?

For example, if the route to prefix 1.1.1.1/32 in LSR-A is:
1.1.1.1/32 -> If_a2 , 1.2.2.2
and there is LDP adjacency only over the first link, does LDP in LSR-A can 
use the advertised label from LSR-B to prefix 1.1.1.1/32?

Thanks.

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