
12-8
Cisco ONS 15454 Reference Manual, R8.5
78-18106-01
Chapter 12 SONET Topologies and Upgrades
12.2.2 Four-Fiber BLSRs
Figure 12-5
Four-Fiber BLSR Span Switch
•
Ring switching (
Figure 12-6
) occurs when a span switch cannot recover traffic, such as when both
the working and protect fibers fail on the same span. In a ring switch, traffic is routed to the protect
fibers throughout the full ring.
Node 0
Node 1
Node 2
Node 3
Span 1
Span 2
Span 3
Span 4
Span 8
Span 7
Span 6
Span 5
OC-48 Ring
= Working fibers
= Protect fibers
61959
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 ...