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SONET/SDH Rate-Selectability Overview

 

You can configure rate selectability on the SONET/SDH OC3/STM1 (Multi-Rate) MICs with SFP, Channelized SONET/SDH OC3/STM1 (Multi-Rate) MICs with SFP, and Channelized OC3/STM1 (Multi-Rate) Circuit Emulation MIC with SFP by specifying the port speed as oc12-stm4, oc3-stm1, or oc48-stm16.

By default, rate selectability is enabled on the SONET/SDH OC3/STM1 (Multi-Rate) MICs with oc3-stm1 speed.

Note

You cannot disable the rate selectability on the 4-port SONET/SDH OC3/STM1(Multi-Rate) MIC and the Channelized SONET/SDH OC3/STM1 (Multi-Rate) MICs with SFP.

Table 1 shows the port speed restrictions on the SONET/SDH OC3/STM1 (Multi-Rate) MICs.

Table 1: Port Speed Restrictions for SONET/SDH OC3/STM1 (Multi-Rate) MICs

Mode\MIC Name

8-port SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP

4-port SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP

Rate-selectable Mode

  • Only the first two ports (0–1) can be configured for oc48-stm16 speed.

  • All eight ports can be configured for oc3-stm1 or oc12-stm4 speed.

  • Total available bandwidth is 8.75 Gbps.

  • Only the first port (0) can be configured for oc48-stm16 speed.

  • All four ports can be configured for oc3-stm1 or oc12-stm4 speed.

  • Total available bandwidth is 4.375 Gbps.

Non-rate-selectable Mode

  • Only the first four ports (0–3) are available and set to oc48-stm16 speed.

  • Total available bandwidth is 10 Gbps.

This mode is not available on this MIC.

All ports of the 8-port Channelized SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP can be configured as channelized OC3/channelized STM1. However, only four ports (ports 0, 1, 2, and 3) can be configured as channelized OC12/channelized STM4. Table 2 and Table 3 indicate the port configuration restrictions of the 8-port Channelized SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP.

Table 2: OC12/STM4 Port Configuration Restrictions on MIC-3D-8CHOC3-4CHOC12

Ports Configured as OC3/STM1

Ports Available for OC12/STM4 Configuration

None

0, 1, 2, and 3

0 or 4

1, 2, and 3

1 or 5

0, 2, and 3

2 or 6

0, 1, and 3

3 or 7

0, 1, and 2

Table 3: OC3/STM1 Port Configuration Restrictions on MIC-3D-8CHOC3-4CHOC12

Ports Configured as OC12/STM4

Ports Available for OC3/STM1 Configuration

None

All ports (0 through 7)

0

All ports except port 4

1

All ports except port 5

2

All ports except port 6

3

All ports except port 7

All ports of the 4-port Channelized SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP can be configured as channelized OC3/channelized STM1. However, only two ports (ports 0 and 1) can be configured as channelized OC12/channelized STM4. Table 4 and Table 5 indicate the port configuration restrictions of the 4-port Channelized SONET/SDH OC3/STM1 (Multi-Rate) MIC with SFP.

Table 4: OC12/STM4 Port Configuration Restrictions on MIC-3D-4CHOC3-2CHOC12

Ports Configured as OC3/STM1

Ports Available for OC12/STM4 Configuration

None

0 and 1

0 or 2

1

1 or 3

0

Table 5: OC3/STM1 Port Configuration Restrictions on MIC-3D-4CHOC3-2CHOC12

Ports Configured as OC12/STM4

Ports Available for OC3/STM1 Configuration

None

All ports (0 through 3)

0

All ports except 2 

1

All ports except 3