Co-ordination Between Segment Protection and Global Protection - Description
M Vinod Kumar. Abhay Karandikar. Version 1.0. Infrastructure Segment Protection. ISP Not Required; . Only Global Protection (GP) . Needed. ISP Required. ISP without GP. ISP with GP. Alan McGuire’s (BT) . ID: 795238 Download
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Co-ordination Between Segment Protection and Global Protection
M Vinod Kumar. Abhay Karandikar. Version 1.0. Infrastructure Segment Protection. ISP Not Required; . Only Global Protection (GP) . Needed. ISP Required. ISP without GP. ISP with GP. Alan McGuire’s (BT) .
Co-ordination Between Segment Protection and Global Protection
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Presentation on theme: "Co-ordination Between Segment Protection and Global Protection"— Presentation transcript:
Slide1
Co-ordination Between Segment Protection and Global Protection
M Vinod Kumar
Abhay Karandikar
Version 1.0
Slide2
Infrastructure Segment Protection
ISP Not Required;
Only Global Protection (GP)
Needed
ISP Required
ISP without GP
ISP with GP
Alan McGuire’s (BT)
Requirement
First ISP and then GP
Certain TESI is outside the scope of ISP; Only GP for them
Need a mechanism to identify ite.g. MST-ID
Fixed Timer
Coordination or Feedback Based Timer
GP Timer > ISP Timer
Efficient and Reliable
Case 1
Case 2
Case 3
Case 3b
Case 3a
Case 3a FT
Case 3a C or FBT
4/8/2009
2
Tejas Networks Ltd
Slide3
Case 1
Infrastructure Segment Protection not required; only Global Protection
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI
Protect
TESI
Bridge
Link
4/8/2009
3
Tejas Networks Ltd
Slide4
Case 2
Only Infrastructure Segment Protection required but
NO Global Protection
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI CCM
Bridge
Link
Work ISP CCM
Protect
ISP CCM
4/8/2009
4
Tejas Networks Ltd
Slide5
Case 3
Infrastructure Segment Protection with Global Protection
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI CCM
Protect
TESI CCM
Bridge
Link
Work ISP CCM
Protect
ISP CCM
Pre-Provisioning of Work TESI/ CCM
4/8/2009
5
Tejas Networks Ltd
Slide6
Observation
Among the 3-cases depicted only case-3 needs extra care
We consider first Case 3b and then Case 3a
4/8/2009
6Tejas Networks Ltd
Slide7
Case 3b
TESI
is outside the scope of Infrastructure Segment Protection
Could use different MST-ID
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI CCM
Protect
TESI CCM
Bridge
Link
Work ISP CCM
Protect
ISP CCM
Pre-Provisioning of Work TESI/ CCM
4/8/2009
7
Tejas Networks Ltd
Slide8
Case 3a Fixed Timer
Infrastructure Segment Protection with Global Protection
If link SEB1-SEB2 fails, Segment Protection should be done before Global Protection
So HoldOffTimer T2>T1, How do we set this? How large should be T2?This will slow the Global Protection. Not reliable.
So Case 3a Coordination or Feedback Based Timer is ideal
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI CCM
Protect
TESI CCM
Bridge
Link
Work ISP CCM
Protect
ISP CCM
Pre-Provisioning of Work TESI/ CCM
T1
T2 > T1
4/8/2009
8
Tejas Networks Ltd
Slide9
Case 3a Coordination or Feedback
Infrastructure Segment Protection with Global Protection
If link SEB1-SEB2 fails, then SEB1 and SEB2 will coordinate with BEB1 and BEB2 informing that ISP will handle the fault
BEB1
SEB1
SEB2
BEB2
N1
N2
Work TESI CCM
Protect
TESI CCM
Bridge
Link
Work ISP CCM
Protect
ISP CCM
Pre-Provisioning of Work TESI/ CCM
Feedback
Feedback
4/8/2009
9
Tejas Networks Ltd
Slide10
Conclusion
Coordination is a mandatory requirement in Case 3a
