Cisco ONS 15454 Reference Manual page 365

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Table of Contents

Circuits and Tunnels

Figure 11-10

Figure 11-11

Mixing 1+1 or BLSR Protected Links With a Path Protection

nidirectional

Unidirectional

(destination)

Alternate Paths for Virtual Path Protection Segments

Unidirectional

Path Segment 1

Path Segment 2

1+1 protected

Needs alternate path

from N1 to N2

For multicard EtherSwitch circuits, the Fully Path Protected option is ignored.

For a node that has a path protection selector based on the links chosen, the input links to the path

protection selectors cannot be 1+1 or BLSR protected

path protection bridge.

Unidirectional

(destination)

In a shared packet ring, choose the links of multicard EtherSwitch circuits to route from source to

destination back to source

Path Segment 3

BLSR protected

No need for alternate path

Unidirectional

1+1 protected

11-12). Otherwise, a route (set of links) chosen with loops is

Cisco ONS 15454 Reference Manual, R7.0.1

11.15 11.15 Manual Circuit Routing

Path Segment 4

1+1 protected

11-11). The same rule applies at the

Unidirectional

(destination)