Configuring the operating mode of a 2.5 Gbps CPOS interface
A high-speed CPOS interface supports the following operating modes:
Channelized mode—Demultiplexes one high-order STM-N frame into four low-order STM-N frames. In this mode, you can transmit multiple channels of data over one fiber. Each channel has dedicated bandwidth and an independent control policy. This mode is suitable for transmitting multiple channels of low-speed signals.
Concatenated mode—Processes one STM-N frame as a whole unit without demultiplexing. All STM-N signals on the fiber transmit one channel of data. The same control policy applies to all data. This mode is suitable for transmitting a channel of high-speed signal.
Set the operating mode of a 2.5 Gbps CPOS interface depending on the line rates you want.
To provide a 2.5 Gbps line, place the CPOS interface in concatenated mode. This task is identical to channelizing the CPOS interface into a 2.5 Gbps channel.
To provide 622 Mbps lines, place the CPOS interface in channelized mode, and then create 622 Mbps channels in concatenated mode.
To provide 155 Mbps lines, channelize the CPOS interface into 622 Mbps channels in channelized mode, and then create 155 Mbps channels on the 622 Mbps channels.
You can configure these channel interfaces as described in "Configuring POS interfaces."
Channelizing a 2.5 Gbps CPOS interface into 622 Mbps channels
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter 2.5 Gbps CPOS interface view. | controller cpos interface-number | N/A |
3. Configure the interface to operate in channelized mode. |
| By default, a 2.5 Gbps CPOS interface operates in channelized mode. |
4. Create a 622 Mbps channel and enter its view. | oc-12 oc-12-number | By default, no 622 Mbps channels exist on a 2.5 Gbps CPOS interface. You can create up to four 622 Mbps channels on a 2.5 Gbps CPOS interface. |
5. Configure the 622 Mbps channel to operate in concatenated mode. | using oc-12c | By default, a 622 Mbps channel operates in channelized mode. When you place a 622 Mbps channel in concatenated mode, a 622 Mbps POS interface is created automatically for the channel. |
Channelizing a 622 Mbps channel into 155 Mbps channels on a 2.5 Gbps CPOS interface
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter 2.5 Gbps CPOS interface view. | controller cpos interface-number | N/A |
3. Configure the interface to operate in channelized mode. |
| By default, a 2.5 Gbps CPOS interface operates in channelized mode. |
4. Create a 622 Mbps channel and enter its view. | oc-12 oc-12-number | By default, no 622 Mbps channels exist on a 2.5 Gbps CPOS interface. |
5. Configure the 622 Mbps channel to operate in channelized mode. |
| By default, a 622 Mbps channel operates in channelized mode. |
6. Create a 155 Mbps channel and enter its view. | oc-3 oc-3-number | By default, no 155 Mbps channels exist on a 622 Mbps channel. You can create up to four 155 Mbps channels on a 622 Mbps channel. |
7. (Optional.) Configure the 155 Mbps channel to operate in concatenated mode. | using oc-3c | A 155 Mbps channel created on a 2.5 Gbps CPOS interface can only operate in concatenated mode. When you create a 155 Mbps channel, the system sets its operating mode to concatenated automatically. When you place a 155 Mbps channel in concatenated mode, a 155 Mbps POS channel interface is created automatically for the channel. |