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Cisco ONS 15454 Reference Manual, R8.5.x
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Chapter 11 Circuits and Tunnels
11.18.5 Open-Ended VCAT
Figure 11-16 Open-Ended VCAT
Open-ended VCAT circuits can originate or terminate on any pair of OC-N ports and you can route
open-ended VCAT circuits using any of the cards and ports supported by VCAT. The CTC circuit
creation wizard provides an additional check box in t he VCAT attributes pane to enable Open-VCAT
circuit creation. Enabling the check box differentiates open-ended VCAT from regular VCAT Circuits.
The routing preferences for an open-ended VCAT circuit must be specified in the initial stages of circuit
provisioning. For example, if the circuit is independent fiber routing, then multiple OC-N ports can be
involved. Alternatively, the source of an open-VCAT circuit should always be a card capable of
participating in a VCG. This allows CTC to determine which routing preferences are permissible.
Auto ranging of 12 STS1 circuits is supported.
11.18.5.1 Open-Ended VCAT Protection
Table 11-19 summarizes the protection options for open-ended VCAT circuits. Note that members can
have different routing preferences.
240645
Source
Open-ended VCAT Circuit
VCAT-Source
CTC Managed
Network
SONET/SDH Port
SONET/SDH Port
Destination
Destination
End-to-end VCAT Circuit
VCAT-Destination
Non-CTC Managed
Network
Table 11-19 Protection options for Open-Ended VCAT Circuits
Routing Preferences Routing Mode Protection Options
Common fiber Manual/Auto • Fully protected (Line only)
• Unprotected
• PCA