I have a ring of 8 routers in a ring runing OSPF , can detect LOS ,so I want to implement RSVP TE with FRR.
For Traffic going from R1 to R4, it will use the Primary Tunnel R1--R2 and then r3, and finally arrive r4. If link between R1--R2 fails, will the traffic quickly move to Backup NNhop tunnel ( as shown in diagram) and hence the user traffic which was sourced behind R1 and wanted to reach destination behind r4 will follow this path r1--r8---r7---r6---r5---r4---r3-----r2-----r3---r4 . As I understand that the Primary FRR & Backup TE Tunnel will have same destination ( its mandatory.. right ?). This creates unwanted traffic on R4--R3--R2 segment...as long as the R1--R2 link is down.
Is this the design problem with One hop tunnel.. ?
My friend say after link failure on R1--R2, IGP convergence will take place and this unwanted upstream movement of user traffic will stop. He couldn't explain why ?
Can somebody explain ...