Shortcuts

1
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

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Infrastructure Protection

• M Vinod Kumar
• CTO office
• Tejas Networks

3
Agenda

• Infrastructure Protection
• Spanning Tree
• PBB-TE Segment Protection Switching (Indian
  Context)
• Ethernet Ring Protection Switching

4
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!

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11 Point-to-Point PBB-TE
4 cuts per 1000 km per annum
Traffic Engineered
13 cuts per 1000 km per annum
3- 5 paths
National PB
3- 5 paths
3- 5 paths
MEP
MEP
Metro PBB-TE
Metro PBB-TE
PBB-TE supports only 11 P2P
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Point-to-Multipoint PBB-TE
Traffic Engineered
3- 5 paths
Metro PBB-TE
3- 5 paths
National PB
3- 5 paths
3- 5 paths
MEP
MEP
Metro PBB-TE
Metro PBB-TE
There is no P2MP protection mechanism in PBB-TE
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Critical Link or Node Protection
3- 5 paths
Server
Metro PBB-TE
National PB
3- 5 paths
3- 5 paths
MEP
MEP
Metro PBB-TE
Metro PBB-TE
8
Segment Protection Switching
PBB gt IEEE 802.1ah PBB-TE gt IEEE
802.1Qay PBB-TE ISP gt 802.1Qbf
3- 5 paths
Segment
National PB
3- 5 paths
3- 5 paths
MEP
MEP
Metro PBB-TE
Metro PBB-TE
M2
Ref bf-vinod-CoordinationBetweenSegProtandPBBTE-0
110-v01.pptx
9
State-Machines
ISP State-Machine
ISP State-Machine
PBB-TE State-Machine
PBB-TE State-Machine
National PB
CBP
PNP
CBP
PNP
Protection Group
Ref bf-vinod-SPG-Entity-0110-v01.pptx
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Working of Segment Protection
State-Machine
State-Machine
(1)
(2)
National PB
(1)
(2)
PNP
PNP
PNP
PNP

1. Collect the faults and perform M1 protection
2. Change the egress port number in MAC table

Ref bf-vinod-SPG-Entity-0110-v01.pptx
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Performance
Features xSTP SPB PBB-TE ERPS ISP
Standard .1Q .1aq Qay G.8032 Qbf
Mechanism Restoration Protection Protection Restoration Protection
Time gt50ms lt 50 ms lt 50ms lt 50ms lt 50ms
Size Campus Carrier Carrier Carrier Carrier
M1 NA 161 11 NA M1
Status Standard Draft Standard Standard Draft
Application LAN Backbone Backbone WAN Backbone
Dynamism Yes Yes No Yes No
Learning Yes Yes No Yes No
Mac-in-Mac - Yes Yes - No
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• Thank You