24 Low Rate (LR) Datapath

This chapter provides conceptual information about 24 LR datapath feature on Cisco NCS 4000 Series routers.

Overview

To handle low rate client signal on NCS4K, this feature provides low rate (OC3/OC12/STM1/STM4 ) data path support on NCS4K-24LR-O-S line card.

Following are the characteristics limitations of this feature:

  • Packet fuctionalities are not supported.

  • Only single TCM functionality is supported.

  • PRBS is not supported.

  • Loopback is not supported on cross connected ODU.

  • NCS4K-24LR-O-S line card has maximum 40G capacity. There are four10G port and 20 low rate ports. Since at a time we cannot use all ports below are few combinations which can be used:

    • On ports 0 to 3, OC3/OC12 can be allocated only if 10GE/OC192 traffic is not configured on Port 22; on port 4 OC3/OC12 can be allocated only if OC48 is not configured on port 0; on port 22 OC3/OC12 can be allocated only if OC48 is not configured on port 2.

    • On ports 6 to 9, OC3/OC12 can be allocated only if 10GE/OC192 traffic is not configured on Port 10; on port 5 OC3/OC12 can be allocated only if OC48 is not configured on port 6; on port 10 OC3/OC12 can be allocated only if OC48 is not configured on port 8.

    • On ports 12 to15, OC3/OC12 can be allocated only if 10GE/OC192 traffic is not configured on Port 23; on port 16 OC3/OC12 can be allocated only if OC48 is not configured on port 12; on port 23 OC3/OC12 can be allocated only if OC48 is not configured on port 14.

    • On ports 18 to 21, OC3/OC12 can be allocated only if 10GE/OC192 traffic is not configured on Port 11; on port 17 OC3/OC12 can be allocated only if OC48 is not configured on port 18; on port 11 OC3/OC12 can be allocated only if OC48 is not configured on port 20.