
12-24
Cisco ONS 15454 Reference Manual, R8.5
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Chapter 12 SONET Topologies and Upgrades
12.4.2 Path Protection DRI
Figure 12-22
ONS 15454 Traditional Path Protection Dual-Ring Interconnect
Figure 12-23
shows ONS 15454 nodes in an integrated DRI topology. The same drop-and-continue
traffic routing occurs at two nodes, rather than four. This is achieved by installing an additional OC-N
trunk at the two interconnect nodes.
Path Selector
Primary Path, Primary
Return Path, Secondary
Return Path, Primary
Primary Path, Secondary
UPSR
Ring 1
Duplicate
Signals
Pass-through
Node
UPSR
Ring 2
Bridge
85761
Node 1
Node 2
Node 3
Node 5
Node 4
Node 7
Node 6
Содержание 15454-DS1-14= - 1.544Mbps Expansion Module
Страница 40: ...Tables xl Cisco ONS 15454 Reference Manual R8 5 78 18106 01 ...
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 ...