7-24
Cisco ONS 15600 Reference Manual, R7.2
Chapter 7 Circuits and Tunnels
7.13.3 Single and Dual Rolls
7.13.3 Single and Dual Rolls
Circuits have an additional layer of roll types: single and dual. A single roll on a circuit is a roll on one
of its cross-connects. Use a single roll to:
•
Change either the source or destination of a selected circuit (Figure 7-8 and Figure 7-9,
respectively).
•
Roll a segment of the circuit onto another chosen circuit (Figure 7-10 on page 7-24). This roll also
results in a new destination or a new source.
In Figure 7-8, you can select any available STS on Node 1 for a new source.
Figure 7-8 Single Source Roll
In Figure 7-9, you can select any available STS on Node 2 for a new destination.
Figure 7-9 Single Destination Roll
Figure 7-10 shows one circuit rolling onto another circuit at the destination. The new circuit has
cross-connects on Node 1, Node 3, and Node 4. CTC deletes the cross-connect on Node 2 after the roll.
Figure 7-10 Single Roll from One Circuit to Another Circuit (Destination Changes)
Figure 7-11 shows one circuit rolling onto another circuit at the source.
83267
Node 1
S1
S2
D
Node 2
Original leg
New leg
83266
Node 1
S
D2
D1
Node 2
Original leg
New leg
78703
Node 1
S
D
D2
Node 2
Node 4Node 3
Original leg
New leg