Low-Order Traffic Routing Over An Ons 15600 Sdh Hub Node; Automatic Low-Order Circuit Creation - Cisco ONS 15600 Reference Manual

Chapter 7 Circuits and Tunnels
7.18 Low-Order Traffic Routing over an ONS 15600 SDH Hub
Node
When an ONS 15600 SDH node is configured as a hub between compatible protection domains, it is
possible to use CTC to automatically create circuits, including low-order circuits from an
ONS 15454 SDH node, across the domains. Low-order circuits cannot terminate on an ONS 15600 SDH
node. All combinations of protection domains are compatible for high-order circuits, including
combinations of SNCP and line-protected domains.
When you must route low-order traffic over an ONS 15600 SDH hub node connecting SNCP,
line-protected, and unprotected domains, you must manually create the circuits for this traffic. For
specific information on ONS 15454 SDH low-order circuit creation and tunneling, refer to the circuit
chapters in the Cisco ONS 15454 SDH Reference Manual.
Figure 7-13
network, an ONS 15454 SDH MS-SPRing network, and a 1+1 protected ONS 15454 SDH node.
Figure 7-13
ONS 15454 SDH

7.18.1 Automatic Low-Order Circuit Creation

To route low-order traffic across an ONS 15600 SDH for compatible protection domains, you must
create a low-order tunnels on an ONS 15454 SDH node or create an end-to-end circuit. If you create an
end-to-end circuit, CTC automatically creates a tunnel to route the low-order traffic. You can create
circuits or tunnels with an ONS 15600 SDH as a hub node for the following domain combinations:
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•
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78-18400-01
shows an ONS 15600 SDH as a protection domain hub between a ONS 15454 SDH SNCP
ONS 15600 SDH as Hub Node between Protection Domains
ONS 15454 SDH
SNCP
ONS 15454 SDH
SNCP to SNCP
1+1 to 1+1
MS-SPRing to MS-SPRing
1+1 to MS-SPRing
Unprotected to MS-SPRing

7.18 Low-Order Traffic Routing over an ONS 15600 SDH Hub Node

ONS 15454 SDH
ONS 15600 SDH
MS-SPRing
1+1
ONS 15454 SDH
ONS 15454 SDH
Cisco ONS 15600 SDH Reference Manual, Release 9.0
ONS 15454 SDH
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