Figure 6-9 Example #1: A Vt1.5 Circuit In A Blsr; Figure 6-10 Example #2: Two Vt1.5 Circuits In A Blsr - Cisco 15454-TCC - Network Processor Card Operation Manual

Chapter 6 Circuits and Tunnels
Figure 6-9
Source
EC-1
In Figure
assigned to STS-2:
Two more of the 24 STSs available for VT1.5 traffic are used.
•
20 STSs are available on the XCVT or XC10G for VT1.5 circuits.
•
STS-2 can carry 27 additional VT1.5 circuits.
•

Figure 6-10 Example #2: Two VT1.5 circuits in a BLSR

Source
EC-1
If you create VT1.5 circuits on nodes in UPSR or 1+1 protection, an additional STS is used for the
protect path at the source and drop nodes.
When the circuit is completed:
• Three of the 24 STSs available for VT1.5 mapping on the XCVT or XC10G are used (one input and
two outputs, one output for the working path and one output for the protect path).
November 2001
Example #1: A VT1.5 circuit in a BLSR
VT1.5 circuit #1 on STS-1
1 VT1.5 used on STS-1
27 VT1.5s available on STS-1
XCVT-XC10G Matrices
STS Matrix
VT1.5 Matrix
6-10, a second VT1.5 circuit is created from the EC-1 card. In this example, the circuit is
VT1.5 circuit #1
XCVT-XC10G Matrices
STS Matrix
VT1.5 circuit #2 on STS-2
1 VT1.5 used on STS-2
27 VT1.5s available on STS-2
2 STSs total used
22 STSs available
4 STSs total used
20 STSs available
Figure 6-11 shows a VT1.5 circuit at a UPSR source node.
Cisco ONS 15454 Installation and Operations Guide
Cross-Connect Card Capacities
Drop
OC-12
STS
VT1.5
Drop
OC-12
STS
VT1.5
6-17