Cisco Systems 15454-FTF2 11.19.4 Two Circuit Bridge and Roll

11-45
Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 11 Circuits and Tunnels
11.19.4 Two Circuit Bridge and Roll
Figure 11-22 Dual Roll to Reroute a Link
Figure 11-23 illustrates a dual roll involving two circuits.
Figure 11-23 Dual Roll to Reroute to a Different Node
Note If a new segment is created on Nodes 3 and 4 using the Bridg e and Roll wizard, the created circuit has
the same name as the original circuit with the suffix _ROLL**. The circuit source is on Node 3 and the
circuit destination is on Node 4.
11.19.4 Two Circuit Bridge and Roll
When using the bridge and roll feature to reroute traffic using two circuits, the following constraints
apply:
• DCC must be enabled on the circuits involved in a roll before roll creation.
• A maximum of two rolls can exist between any two circuits.
• If two rolls are involved between two circuits, both rolls must be on the original circuit. The second
circuit should not carry live traffic. The two rolls loop from the second circuit back to the original
circuit. The roll mode of the two rolls must be identical (either automatic or manual).
• If a single roll exists on a circuit, you must roll the connection onto the source or the destination of
the second circuit and not an intermediate node in the circuit.
83268
Node 1
SD
Node 2
Original leg
New leg
83102
Node 1
SD
Node 2
Node 4Node 3
Original leg
New leg