Datasheet

CHAPTER
12-1
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
12
SDH Topologies and Upgrades
This chapter explains Cisco ONS 15454 SDH topologies and upgrades. To provision topologies, refer to
the Cisco ONS 15454 SDH Procedure Guide.
Chapter topics include:
• 12.1 SDH Rings and TCC2/TCC2P Cards, page 12-1
• 12.2 Multiplex Section-Shared Protection Rings, page 12-2
• 12.3 Subnetwork Connection Protection, page 12-13
• 12.4 Dual Ring Interconnect, page 12-18
• 12.5 Subtending Rings, page 12-25
• 12.6 Linear ADM Configurations, page 12-27
• 12.7 Extended SNCP Mesh Networks, page 12-28
• 12.8 Four Node Configurations, page 12-30
• 12.9 STM-N Speed Upgrades, page 12-30
12.1 SDH Rings and TCC2/TCC2P Cards
Table 12-1 shows the SDH rings that can be created on each ONS 15454 SDH node using redundant
TCC2/TCC2P cards.
Table 12-1 ONS 15454 SDH Rings with Redundant TCC2/TCC2P Cards
Ring Type Maximum Rings per Node
MS-SPRings
1
1. MS-SPRing = multiplex section-shared protection ring
5
2-Fiber MS-SPRings 5
4-Fiber MS-SPRings 1
SNCP with RS-DCC 34
2 3
2. Total RS-DCC usage must be equal to or less than 84 RS-DCCs.
3. See the “12.3 Subnetwork Connection Protection” section on page 12-13.
SNCP with MS-DCC 14
4 5
SNCP with MS-DCC and
RS-DCC
26
6