1. Extensions to RSVP-TE for P2MP LSP Ingress/Egress Local Protection
draft-chen-mpls-p2mp-ingress-protection
draft-chen-mpls-p2mp-egress-protection
Huaimo Chen
Ning So

2. Contents Proposed P2MP LSP Ingress & Egress Local Protection
Advantages of P2MP LSP Ingress and Egress Local Protection
It can be used for P2P LSP Ingress/Egress Protection accordingly

3. P2MP LSP Ingress Local Protection (Animated)
Multicast
Receiver
local protection for ingress failure
Multicast
Source
P2MP
RPF Check
PE1
PIM Join
BFD
Data
CE1
CE3
PE5
PE2
CE4
PE6
PE3
Data
CE2
PE4
P2MP LSP
Backup LSP
Connection for BFD
Primary ingress PE5 fails:
Traffic to backup tunnel
Traffic merged into P2MP LSP

4. P2MP LSP Ingress Local Protection (Animated)
Multicast
Receiver
local protection for link to ingress failure
Multicast
Source
P2MP
RPF Check
PE1
PIM Join
BFD
Data
CE1
CE3
PE5
PE2
PE6
PE3
Data
CE2
PE4
P2MP LSP
Backup LSP
Link between CE3 and PE5 fails:
Traffic to backup tunnel
Traffic merged into P2MP LSP

5. P2MP LSP Ingress Local Protection (Animated)
Multicast
Receiver
local protection for CE to ingress failure
Multicast
Source
P2MP
RPF Check
PE1
PIM Join
BFD
Data
CE1
CE3
PE5
PE2
CE4
PE6
PE3
Data
CE2
PE4
P2MP LSP
Backup LSP
CE3 fails:
Traffic to backup tunnel
Traffic merged into P2MP LSP

6. P2MP LSP Egress Local Protection(Animated)
Multicast
Receiver
Local protection for egress failure
BFD
Multicast
Source
P2MP
PE1
Data
CE1
(S,G)Join
CE3
PE5
PE2
CE4
PE6
PE3
Data
CE2
P2MP LSP
PE4
Backup LSP
When primary egress PE1 fails,
Traffic to backup tunnel to PE2 (backup egress)
Traffic delivered to CE1 from PE2

7. P2MP LSP Egress Local Protection(Animated)
Multicast
Receiver
Local protection for link to CE failure
BFD
Multicast
Source
P2MP
PE1
Data
CE1
(S,G)Join
CE3
PE5
PE2
CE4
PE6
PE3
Data
CE2
P2MP LSP
PE4
Backup LSP
When link from egress PE1 to CE1 fails,
Traffic to backup tunnel to PE2 (backup egress)
Traffic delivered to CE1 from PE2

8. P2MP LSP Ingress & Egress Local Protection(Animated)
Existing scenario: double root and every leaf
Create two global P2MP LSP from each root to leaves, carrying data at same time
Multicast
Receiver
BFD
Multicast
Source
P2MP
PE1
Data
BFD
CE1
CE1
PE2
(S,G)Join
CE3
PE5
CE4
PE6
PE3
Data
CE2
P2MP LSP
PE4
Backup LSP
One P2MP LSP for all: Every part (ingress & egress) is locally protected
Big resource saving (e.g, no double bw resv)
Faster failure recovery: local protection speed

9. Advantages of P2MP LSP Ingress and Egress Local Protection
All parts of P2MP LSP are locally protected
Only one P2MP LSP is used to implement an E2E protection
Normally two P2MP LSPs are used
Big saving on resource : 50% bandwidth saving
No need to reserve/use double bandwidth
Faster recovery
Speed of local protection recovery
Flow recovery within 50ms when a failure happens
Easier to operate

10. Next Step Welcome comments
Request to make it into a working group document