Cross-Connect Card Bandwidth; Dcc Tunnels; Traditional Dcc Tunnels; Table 7-5 Dcc Tunnels - Cisco ONS 15600 Reference Manual

Chapter 7 Circuits and Tunnels
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7.3 Cross-Connect Card Bandwidth

The single shelf cross-connect card (SSXC) cross-connect cards perform port-to-port, time-division
multiplexing (TDM). The STS matrix has the capacity for 6144 STS terminations. Because each STS
circuit requires a minimum of two terminations, one for ingress and one for egress, the SSXC has a
capacity for 3072 STS circuits. However, this capacity is reduced at path protection and 1+1 nodes
because three STS terminations are required at circuit source and destination nodes and four
terminations are required at 1+1 circuit pass-through nodes. Path Protection pass-through nodes only
require two STS terminations.

7.4 DCC Tunnels

SONET provides four data communications channels (DCCs) for network element operations,
administration, maintenance, and provisioning: one on the SONET Section layer (DCC1) and three on
the SONET Line layer (DCC2, DCC3, DCC4). The ONS 15600 uses the Section DCC (SDCC) for
ONS 15600 management and provisioning. You can tunnel third-party SONET equipment across
ONS 15600 networks using one of two tunneling methods, a traditional DCC tunnel or an
IP-encapsulated tunnel.

7.4.1 Traditional DCC Tunnels

In traditional DCC tunnels, you can use the three Line DCCs (LDCCs) and the SDCC (when not used
for ONS 15600 DCC terminations). A DCC tunnel endpoint is defined by slot, port, and DCC, where
DCC can be either the SDCC or one of the LDCCs. You can link LDCCs to LDCCs and link SDCCs to
SDCCs. You can also link an SDCC to an LDCC and an LDCC to an SDCC. To create a DCC tunnel,
connect the tunnel endpoints from one ONS 15600 optical port to another.
tunnels that you can create.
Table 7-5
DCC
DCC1
DCC2
DCC3
DCC4
When you create DCC tunnels, keep the following guidelines in mind:
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Right-click a port containing a path-trace-capable card to initiate the path trace.
Right-click a path protection span to change the state of the path selectors in the path protection
circuit.
DCC Tunnels
SONET Layer SONET Bytes
Section D1 to D3
Line D4 to D6
Line D7 to D9
Line D10 to D12
Each ONS 15600 can have up to 64 DCC tunnel connections.
An SDCC that is terminated cannot be used as a DCC tunnel endpoint.
An SDCC that is used as an DCC tunnel endpoint cannot be terminated.
7.3 Cross-Connect Card Bandwidth
Table 7-5
Cisco ONS 15600 Reference Manual, R6.0
lists the DCC
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