Figure 12-12 Connecting Fiber To A Four-Node, Four-Fiber Blsr; Table 12-4 Comparison Of The Protection Schemes - Cisco ONS 15454 Reference Manual

12.3 12.3 Comparison of the Protection Schemes
Figure 12-12 Connecting Fiber to a Four-Node, Four-Fiber BLSR
Node 1
Tx
Rx
West
Slot Slot
5 6
Tx
Rx
West
Slot Slot
5 6
Node 4
12.3 Comparison of the Protection Schemes
Table 12-4
Table 12-4
Topology
Path Protection
Two-Fiber BLSR
Four-Fiber BLSR
Two-Fiber BLSR DRI
Path Protection DRI
1. N equals the number of ONS 15454 nodes configured as BLSR nodes.
Cisco ONS 15454 Reference Manual, R7.0.1
12-14
East West
Slot Slot
12 13
East West
Slot Slot
12 13
shows a comparison of the different protection schemes using OC-48 as an example.
Comparison of the Protection Schemes
Node 2
Tx
Rx
Slot Slot Slot Slot
5 6 12
Tx
Rx
Slot Slot Slot Slot
5 6 12
Node 3
Working fibers
Protect fibers
Protected
Bandwidth
Between
Ring Any Two
Capacity Nodes
48 - PT STS 1-48
1
24 x N - STS 1-24
2
PT
48 x N - PT STS 1-48
(Fiber 1)
24 x N - PT STS 1-24
48 - PT STS 1-48
Chapter 12 SONET Topologies and Upgrades
East
13
East
13
Protection
Channel Dual
Access Failure
Not Not
supported supported
STS 25-48 Not
supported
STS 1-48 Supported
(Fiber 2)
STS 25-48 Supported
Not Supported
supported
Number of Cards
2 x N
2 x N
4 x N
(2 x N) + 4
(2 x N) + 4
OL-9217-01