Blsr Fiber Connections - Cisco ONS 15600 Reference Manual

Chapter 8 SONET Topologies and Upgrades
Table 8-2
OC Rate
OC-48
OC-192
1. N equals the number of ONS 15600 nodes configured as BLSR nodes.
2. PT equals the number of STS-1 circuits passed through ONS 15600 nodes in the ring (capacity can vary
Figure 8-8
simultaneously on different spans around the ring: one set from Node 3 to Node 1, another set from
Node 1 to Node 2, and another set from Node 2 to Node 3.
Figure 8-8
Node 3

8.3.4 BLSR Fiber Connections

Plan your fiber connections and use the same plan for all BLSR nodes. For example, make the east port
the farthest slot to the right and the west port the farthest slot to the left. Plug fiber connected to an east
port at one node into the west port on an adjacent node.
two-fiber BLSR with trunk (span) ports in Slot 4 (west) and Slot 12 (east). Refer to the
Cisco ONS 15600 Procedure Guide for fiber connection procedures.
Four-Fiber BLSR Capacity
Working Bandwidth
STS 1-48 (Fiber 1)
STS 1-192 (Fiber 1)
depending on the traffic pattern).
shows an example of BLSR bandwidth reuse. The same STS carries three different traffic sets
BLSR Bandwidth Reuse
STS 1
STS 1
Node 2
Protection Bandwidth Ring Capacity
STS 1-48 (Fiber 2) 48 x N
STS 1-192 (Fiber 2) 192 x N – PT
Node 0
STS 1
Node 1
STS 1
= Node 3 – Node 1 traffic
= Node 1 – Node 2 traffic
= Node 2 – Node 3 traffic
Figure 8-9
Cisco ONS 15600 Reference Manual, R6.0
8.3.4 BLSR Fiber Connections
1 2
– PT
shows fiber connections for a
8-9