
8-4
Cisco ONS 15600 Reference Manual, R7.0
Chapter 8 SONET Topologies and Upgrades
8.3.1 Two-Fiber BLSRs
Figure 8-3
Four-Node, Two-Fiber BLSR Traffic Pattern Sample
shows how traffic is rerouted following a line break between Node 0 and Node 3.
•
All circuits originating on Node 0 that carried traffic to Node 2 on Fiber 2 are switched to the protect
bandwidth of Fiber 1. For example, a circuit carrying traffic on STS-1 on Fiber 2 is switched to
STS-25 on Fiber 1. A circuit carried on STS-2 on Fiber 2 is switched to STS-26 on Fiber 1. Fiber 1
carries the circuit to Node 3 (the original routing destination). Node 3 switches the circuit back to
STS-1 on Fiber 2 where it is routed to Node 2 on STS-1.
•
Circuits originating on Node 2 that normally carry traffic to Node 0 on Fiber 1 switch to the protect
bandwidth of Fiber 2 at Node 3. For example, a circuit carrying traffic on STS-2 on Fiber 1 switches
to STS-26 on Fiber 2. Fiber 2 carries the circuit to Node 0 where the circuit switches back to STS-2
on Fiber 1 and is then dropped to its destination.
Node 0
Node 1
Traffic flow
Node 2
Node 3
OC-48 Ring
Fiber 1
Fiber 2
96672
Содержание ONS 15600 Series
Страница 27: ...xxvii Cisco ONS 15600 Reference Manual R7 0 About this Manual ...
Страница 29: ...xxix Cisco ONS 15600 Reference Manual R7 0 About this Manual ...
Страница 52: ...1 22 Cisco ONS 15600 Reference Manual R7 0 Chapter 1 Shelf and Backplane Hardware 1 11 5 Card Replacement ...
Страница 80: ...2 28 Cisco ONS 15600 Reference Manual R7 0 Chapter 2 Card Reference 2 9 Filler Card ...
Страница 110: ...5 10 Cisco ONS 15600 Reference Manual R7 0 Chapter 5 Security 5 4 2 Shared Secrets ...
Страница 142: ...7 28 Cisco ONS 15600 Reference Manual R7 0 Chapter 7 Circuits and Tunnels 7 16 Server Trails ...
Страница 270: ...13 16 Cisco ONS 15600 Reference Manual R7 0 Chapter 13 SNMP 13 8 5 History Control RMON Group ...