Agenda of transportation and communication

Evolution of transportation

1. Tejas Networks Ltd 2010
Shortcuts
1.Agenda
2.Indian Scenario
3.P2P PBB-TE
4.P2MP PBB-TE
5.Critical Link
6.Segment Definition
7.State-machines
8.Fault Scenario
9.Performance

2. M Vinod Kumar
CTO office
Tejas Networks
Infrastructure Protection

3. Tejas Networks Ltd 2010
Agenda
•Infrastructure Protection
–Spanning Tree
–PBB-TE Segment Protection Switching (Indian
Context)
–Ethernet Ring Protection Switching

4. Tejas Networks Ltd 2010
Indian Scenario
•Metro
–13 Fibre cuts per 1000 km per annum
•Long Haul
–4 Fibre cuts per 1000 km per annum
•Maximum cuts
–30 to 50 Fibre cuts per 1000km per month
•Alternate paths
–3 to 5 path in metro and core
–Providers want to use these paths!

5. Tejas Networks Ltd 2010
1:1 Point-to-Point PBB-TE
National
PB
Metro
PBB-TE
Metro
PBB-TE
3-5 paths
3-5 paths
3-5 paths
MEPMEP
PBB-TE supports only 1:1 P2P
Traffic
Engineered
4 cuts per 1000
km per annum
13 cuts per 1000
km per annum

6. Tejas Networks Ltd 2010
Point-to-Multipoint PBB-TE
National
PB
Metro
PBB-TE
Metro
PBB-TE
3-5 paths
3-5 paths
3-5 paths
There is no P2MP protection mechanism in PBB-TE
MEPMEP
Metro
PBB-TE
Traffic
Engineered
3-5 paths

7. Tejas Networks Ltd 2010
National
PB
Metro
PBB-TE
Critical Link or Node Protection
Metro
PBB-TE
Metro
PBB-TE
3-5 paths
3-5 paths
3-5 paths
MEPMEP
Server

8. Tejas Networks Ltd 2010
Segment Protection Switching
National
PB
Metro
PBB-TE
Metro
PBB-TE
3-5 paths
3-5 paths
3-5 paths
MEPMEP
M=2
PBB => IEEE 802.1ah
PBB-TE => IEEE 802.1Qay
PBB-TE ISP => 802.1Qbf
Segment
Ref: bf-vinod-CoordinationBetweenSegProtandPBBTE-0110-v01.pptx

9. Tejas Networks Ltd 2010
State-Machines
Relay
P3
P4P2
P1
Relay
P3
P4P2
P1
National
PB
ISP
State-
Machine
ISP
State-
Machine
Ref: bf-vinod-SPG-Entity-0110-v01.pptx
Protection
Group
PBB-TE
State-
Machine
PBB-TE
State-
Machine
CBP PNP CBPPNP

10. Tejas Networks Ltd 2010
Working of Segment Protection
Relay
P3
P4P2
P1
Relay
P3
P4P2
P1
National
PB
State-
Machine
State-
Machine
1.Collect the faults and perform M:1 protection
2.Change the egress port number in MAC table
(1)(2)
(1) (2)
Ref: bf-vinod-SPG-Entity-0110-v01.pptx
PNPPNP PNP PNP

11. Tejas Networks Ltd 2010
Performance
Features xSTP SPB PBB-TE ERPS ISP
Standard .1Q .1aq Qay G.8032 Qbf
MechanismRestorationProtectionProtectionRestorationProtection
Time >50ms < 50 ms < 50ms < 50ms < 50ms
Size Campus Carrier Carrier Carrier Carrier
M:1 NA 16:1 1:1 NA M:1
Status Standard Draft Standard Standard Draft
ApplicationLAN Backbone Backbone WAN Backbone
Dynamism Yes Yes No Yes No
Learning Yes Yes No Yes No
Mac-in-Mac- Yes Yes - No

12. Tejas Networks Ltd 2010
Thank You