Draft-liu-mpls-rsvp-te-gr-frr-00

By

H. Autumn Liu & Sriganesh Kini

76th IETF, Hiroshima Japan

Problem we’re solving

• RSVP GR when FRR is in effect

R1 R2 R3

R6

Protected LSP : R1-R2-R3-R4-R5Bypass LSP : R2-R6-R4PLR : R2MP : R4

R4 R5

Problem we’re solving (Cont)

• PLR and MP are more than one hop away via bypass tunnel for facility protection

• When FRR triggers, traffic on protected LSPs is switched to go through bypass tunnel

• There is no hello between the PLR and MP if they are multiple hops away

Solution

• Allow RSVP hello session to be established between non-directly-connected nodes

• Hello is sent via IP, TTL is set to 255

• Hello is sent via tunnel, TTL is set to 1

Solution (Cont)

• Non-directly-connected neighbor discovery

- discovered dynamically, e.g. by bypass tunnel setup and being selected for FRR

- manual configuration

Questions / Comments?