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Chapter 11 Circuits and Tunnels
11.16 Manual Circuit Routing
Figure 11-10
Alternate Paths for Virtual Path Protection Segments
•
For multicard EtherSwitch circuits, the Fully Path Protected option is ignored.
•
For a node that has a path protection selector based on the links chosen, the input links to the path
protection selectors cannot be 1+1 or BLSR protected (
Figure 11-11
). The same rule applies at the
path protection bridge.
Figure 11-11
Mixing 1+1 or BLSR Protected Links With a Path Protection Configuration
•
In a shared packet ring, choose the links of multicard EtherSwitch circuits to route from source to
destination back to source (
Figure 11-12
). Otherwise, a route (set of links) chosen with loops is
invalid.
55403
BLSR ring
1+1
1+1
1+1
Twoway
Twoway
Twoway
Twoway
Node 8
Node 7
Node 5
Node 6
Unidirectional
Unidirectional
Twoway
Twoway
Node 4
Node 3
Node 1
Node 2
Twoway
Node 12
Node 11
Node 9
Node 10
Source
Path Segment 1
Path/MESH
protected
Needs alternate path
from N1 to N2
Drop
Path Segment 3
BLSR protected
Path Segment 2
1+1 protected
Path Segment 4
1+1 protected
No need for alternate path
55404
Unprotected
Unprotected
Unprotected
Unprotected
Unprotected
Unprotected
1+1 protected
BLSR ring
Node 4
(destination)
Node 3
Unidirectional
Unidirectional
Unidirectional
Unidirectional
Unidirectional
Unidirectional
Node 4
Node 3
Node 1
(source)
Node 2
(destination)
Node 1
(source)
Node 2
Node 1
(source)
Node 2
Node 4
(destination)
Node 3
Illegal
Illegal
Unprotected
Legal
Содержание 15454-DS1-14= - 1.544Mbps Expansion Module
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Страница 49: ...xlix Cisco ONS 15454 Reference Manual R8 5 78 18106 01 About this Manual ...
Страница 51: ...li Cisco ONS 15454 Reference Manual R8 5 78 18106 01 About this Manual ...
Страница 168: ...2 34 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 2 Common Control Cards 2 7 6 Data Communications Channel ...
Страница 296: ...5 40 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 5 Ethernet Cards 5 14 4 SFP Description ...
Страница 320: ...7 16 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 7 Card Protection 7 5 External Switching Commands ...
Страница 358: ...10 6 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 10 Timing 10 3 2 SDH SSM Messages ...
Страница 584: ...15 56 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 15 Performance Monitoring 15 9 3 FC_MR 4 History Window ...
Страница 608: ...16 24 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Chapter 16 SNMP 16 10 7 Event RMON Group ...
Страница 796: ...C 122 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 Appendix C Network Element Defaults C 4 CTC Default Settings ...
Страница 826: ...Index IN 30 Cisco ONS 15454 Reference Manual R8 5 78 18106 01 ...