Cisco ONS 15454 SDH Manual page 12

11.3 Cross-Connect Card Bandwidth
11.3 Cross-Connect Card Bandwidth
The XC-VXL-10G, XC-VXL-2.5G, and XC-VXC-10G cards support both low-order and high-order
circuits, although only the XC-VXC-10G card supports VC-11 (low-order) circuits. The XC-VXL-10G
and XC-VXL-2.5G cards manage up to 192 bidirectional STM-1 cross-connects, 192 bidirectional E-3
or DS-3 cross-connects, or 1008 bidirectional E-1 cross-connects. The XC-VXC-10G card manages up
to 576 bidirectional STM-1 cross-connects, 576 bidirectional E-3 or DS-3 cross-connects, or 1344
bidirectional E-1 cross-connects.
The XC-VXL-10G, XC-VXL-2.5G, and XC-VXC-10G cards work with the TCC2/TCC2P card to
maintain connections and set up cross-connects within the node. You can create circuits using CTC.
Chapter 2, "Common Control Cards,"
Note
XC-VXL-2.5G, and XC-VXC-10G cards.
11.4 DCC Tunnels
SDH provides four DCCs for network element operation, administration, maintenance, and
provisioning: one on the SDH regenerator section layer (RS-DCC) and three on the SDH multiplex
section layer, also called multiplex-section DCC (MS-DCC). A regenerator-section DCC (RS-DCC) and
multiplex-section DCC (MS-DCC) each provide 192 Kbps of bandwidth per channel. The aggregate
bandwidth of the three RS-DCCs is 576 Kbps. When multiple DCC channels exist between two
neighboring nodes, the ONS 15454 SDH balances traffic over the existing DCC channels. You can
tunnel third-party SDH equipment across ONS 15454 SDH networks using one of two tunneling
methods, a traditional DCC tunnel or an IP-encapsulated tunnel.
11.4.1 Traditional DCC Tunnels
In traditional DCC tunnels, the ONS 15454 SDH uses RS-DCC for inter-ONS-15454-SDH data
communications. It does not use the multiplex section DCCs; therefore, the MS-DCCs are available to
tunnel DCCs from third-party equipment across ONS 15454 SDH networks. If D4 through D12 are used
as data DCCs, they cannot be used for DCC tunneling.
A traditional DCC tunnel endpoint is defined by slot, port, and DCC, where DCC can be either the
RS-DCC, Tunnel 1, Tunnel 2, or Tunnel 3. You can link an RS-DCC to a MS-DCC (Tunnel 1, Tunnel 2,
or Tunnel 3) and a MS-DCC to an RS-DCC. You can also link MS-DCCs to MS-DCCs and link
RS-DCCs to RS-DCCs. To create a DCC tunnel, you connect the tunnel end points from one
ONS 15454 SDH STM-N port to another. Cisco recommends a maximum of 84 DCC tunnel connections
for an ONS 15454 SDH.
Table 11-5
DCC
RS-DCC
Tunnel 1
Cisco ONS 15454 SDH Reference Manual, R8.5
11-12
contains detailed specifications of the XC-VXL-10G,
Table 11-5 shows the DCC tunnels that you can create.
DCC Tunnels
SDH Layer SDH Bytes
Regenerator Section D1 to D3
Multiplex Section D4 to D6
Chapter 11 Circuits and Tunnels
STM-1
4 Ports 8 Ports
Yes Yes
No Yes
STM-4,
STM-16,
STM-64
Yes
Yes
78-18119-01