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Configuring SAToP on 4-Port Channelized OC3/STM1 Circuit Emulation MICs

 

To configure Structure-Agnostic TDM over Packet (SAToP) on a 4-port Channelized OC3/STM1 Circuit Emulation MIC (MIC-3D-4COC3-1COC12-CE), you must configure the framing mode at the MIC level or port level and then configure each port as E1 interface or T1 interface.

Configuring SONET/SDH Rate-Selectability

You can configure rate-selectability on the Channelized OC3/STM1 (Multi-Rate) MICs with SFP by specifying its port speed as COC3-CSTM1 or COC12-CSTM4.

To configure rate-selectability:

  1. In configuration mode, go to the [edit chassis fpc slot pic slot port slot] hierarchy level.

    For example:

  2. Set the speed as coc3-cstm1 or coc12-cstm4.

    For example:

    Note

    When the speed is set as coc12-cstm4, instead of configuring COC3 ports down to T1 channels and CSTM1 ports down to E1 channels, you must configure COC12 ports down to T1 channels and CSTM4 channels down to E1 channels.

Configuring SONET/SDH Framing Mode at the MIC Level

To configure framing mode at the MIC level:

  1. Go to the [edit chassis fpc fpc-slot pic pic-slot] hierarchy level.
  2. Configure the framing mode as SONET for COC3 or SDH for CSTM1.

After a MIC is brought online, interfaces are created for the MIC’s available ports on the basis of the MIC type and the configured framing mode of each port:

  • When the framing sonet statement (for a COC3 Circuit Emulation MIC) is enabled, four COC3 interfaces are created.

  • When the framing sdh statement (for a CSTM1 Circuit Emulation MIC) is enabled, four CSTM1 interfaces are created.

  • Note that when you do not specify framing mode at the MIC level, then the default framing mode is SONET for all the four ports.

Note

If you set the framing option incorrectly for the MIC type, the commit operation fails.

Bit error rate test (BERT) patterns with all ones received by T1/E1 interfaces on Circuit Emulation MICs configured for SAToP do not result in an alarm indication signal (AIS) defect. As a result, the T1/E1 interfaces remain up.

Configuring SONET/SDH Framing Mode at the Port Level

Each port’s framing mode can be configured individually, as either COC3 (SONET) or STM1 (SDH). Ports not configured for framing retain the MIC framing configuration, which is SONET by default if you have not specified framing at the MIC level. To set the framing mode for individual ports, include the framing statement at the [edit chassis fpc fpc-slot pic pic-slot port port-number] hierarchy level:

To configure the framing mode as SONET for COC3 or SDH for CSTM1 at port level:

  1. Go to the [edit chassis fpc fpc-slot pic pic-slot port port-number] hierarchy level.
  2. Configure the framing mode as SONET for COC3 or SDH for CSTM1.
Note

Configuring the framing mode at the port level overwrites the previous MIC-level framing mode configuration for the specified port. Subsequently, configuring the MIC-level framing mode overwrites the port-level framing configuration. For example, if you want three STM1 ports and one COC3 port, then it is practical to first configure the MIC for SDH framing and then configure one port for SONET framing.

Configuring SAToP Options on T1 interfaces

To configure the SAToP on an T1 interface, you must perform the following tasks:

  1. Configuring COC3 Ports Down to T1 Channels

  2. Configuring SAToP Options on a T1 interface

Configuring COC3 Ports Down to T1 Channels

On any port (numbered 0 through 3) configured for SONET framing, you can configure three COC1 channels (numbered 1 through 3). On each COC1 channel, you can configure 28 T1 channels (numbered 1 through 28).

To configure COC3 channelization down to COC1 and then down to T1 channels:

  1. In configuration mode, go to the [edit interfaces coc3-fpc-slot/pic-slot/port]

    For example:

  2. Configure the sublevel interface partition index, range of SONET/SDH slices, and sublevel interface type.

    For example:

  3. Enter up command to go to [edit interfaces] hierarchy level.
  4. Configure the channelized OC1 interface, sublevel interface partition index, and the interface type.

    For example:

  5. Enter up to go to [edit interfaces] hierarchy level.
  6. Configure the FPC slot, MIC slot and the port for T1 interface. Configure the encapsulation as SAToP and the logical interface for T1 interface.

    For example:

Note

Similarly, you can configure the COC12 ports down to T1 channels. When configuring COC12 ports down to T1 channels, on a port configured for SONET framing, you can configure twelve COC1 channels (numbered 1 through 12). On each COC1 channel, you can configure 28 T1 channels (numbered 1 through 28).

After you partition the T1 channels, configure the SAToP options.

Configuring SAToP Options on a T1 interface

To configure SAToP options on a T1 interface:

  1. In configuration mode, go to the [edit interfaces t1-fpc-slot/pic-slot/port] hierarchy level.
  2. Use the edit command to go to the satop-options hierarchy level.
  3. Configure the following SAToP options:
    • excessive-packet-loss-rate—Set packet loss options. The options are sample-period and threshold.

    • idle-pattern—An 8-bit hexadecimal pattern to replace TDM data in a lost packet (from 0 through 255).

    • jitter-buffer-auto-adjust—Automatically adjust the jitter buffer.

      Note

      The jitter-buffer-auto-adjust option is not applicable on MX Series routers.

    • jitter-buffer-latency—Time delay in the jitter buffer (from 1 through 1000 milliseconds).

    • jitter-buffer-packets—Number of packets in the jitter buffer (from 1 through 64 packets).

    • payload-size—Configure the payload size, in bytes (from 32 through 1024 bytes).

Configuring SAToP Options on E1 Interfaces

To configure the SAToP on an E1 interface.

  1. Configuring CSTM1 Ports Down to E1 Channels

  2. Configuring SAToP Options on E1 Interfaces

Configuring CSTM1 Ports Down to E1 Channels

On any port (numbered 0 through 3) configured for SDH framing, you can configure one CAU4 channel. On each CAU4 channel, you can configure 63 E1 channels (numbered 1 through 63).

To configure CSTM1 channelization down to CAU4 and then down to E1 channels.

  1. In configuration mode, go to the [edit interfaces cstm1-fpc-slot/pic-slot/port]

    For example:

  2. Configure the channelize interface as clear channel and the set the interface-type as cau4
  3. Enter up to go to [edit interfaces] hierarchy level.
  4. Configure the FPC slot, MIC slot and the port for CAU4 interface. Configure the sublevel interface partition index and the interface type as E1.

    For example:

  5. Enter up to go to [edit interfaces] hierarchy level.
  6. Configure the FPC slot, MIC slot and the port for E1 interface. Configure the encapsulation as SAToP and the logical interface for E1 interface.

    For example:

Note

Similarly, you can configure the CSTM4 channels down to E1 channels.

After you configure the E1 channels, configure the SAToP options.

Configuring SAToP Options on E1 Interfaces

To configure SAToP options on E1 interfaces:

  1. In configuration mode, go to the [edit interfaces e1-fpc-slot/pic-slot/port] hierarchy level.
  2. Use the edit command to go to the satop-options hierarchy level.
  3. Configure the following SAToP options:
    • excessive-packet-loss-rate—Set packet loss options. The options are sample-period and threshold.

    • idle-pattern—An 8-bit hexadecimal pattern to replace TDM data in a lost packet (from 0 through 255).

    • jitter-buffer-auto-adjust—Automatically adjust the jitter buffer.

      Note

      The jitter-buffer-auto-adjust option is not applicable on MX Series routers.

    • jitter-buffer-latency—Time delay in the jitter buffer (from 1 through 1000 milliseconds).

    • jitter-buffer-packets—Number of packets in the jitter buffer (from 1 through 64 packets).

    • payload-size—Configure the payload size, in bytes (from 32 through 1024 bytes).