The MPLS WG Archive

[Sachin Kalra <skalra@opnet.com>]

Hi All:

I have few questions regarding Fast Reroute using Bypass tunnels using 
RSVP-TE. Any help is appreciated.

Consider the following network, where 10 different LSPs are 
traversing  [R1]-->[R2]-->[R3]-->[R4]-->[R5], another one LSP traversing 
[R1]-->[R2]-->[R10], And there is a Bypass Tunnel configured 
from  [R2]==>[R6]==>[R7]==>[R8]==>[R4]


       [R0]            [R10]
             \          /
               \      /		
[R1]---------[R2]--------X----------[R3]----------------[R4]-----------------[R5] 

                   \\                                          //   \
                    \\                                        //      \
                     [R6]======[R7]======[R8]         [R9]


Now my questions are:
1. Does the Bypass Tunnel protects all 10 LSPs or we can associate just 
some of them to the Tunnel?

2. How to disassociate LSP [R1]-->[R2]-->[R10] from the bypass tunnel?

3. How does [R2] makes its NHLFEs for the Bypass Tunnel?

4. What FEC does [R2] use to inject traffic into the bypass tunnel at time 
of failure? Or how does [R2] associate any traffic with the Bypass Tunnel?

I would appreciate answer to all or any of the above questions.

Thanks,
Sachin Kalra