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Configuring the 4-Port Channelized COC3/STM1 Circuit Emulation PIC Operating Mode

T1/E1 Mode Selection

All ATM interfaces are either T1 or E1 channels within the COC3/CSTM1 hierarchy. Each COC3 can be partitioned as 3 COC1 slices, each of which in turn can be partitioned further into 28 ATM interfaces and the size of each interface created is that of a T1. Each CS1 can be portioned as 1 CAU4, which can be further partitioned as E1 sized ATM interfaces.

To configure the T1/E1 mode selection, keep the following in mind:

  1. To create coc3-fpc/pic/port or cstm1-fpc/pic/port interfaces, chassisd will look for configuration at the [edit chassis fpc fpc-slot pic pic-slot port port framing (sonet | sdh)] hierarchy level. If the sdh option is specified, chassisd will create a cstm1-fpc/pic/port interface. Otherwise, chassisd will create coc3-fpc/pic/port interfaces.
  2. Only interface coc1 can be created from coc3, and t1 can be created from coc1.
  3. Only interface cau4 can be created from cstm1, and e1 can be created from cau4.

Figure 1 and Figure 2 illustrate the possible interfaces that can be created on the 4-port Channelized COC3/STM1 Circuit Emulation PIC.

Figure 1: 4-Port Channelized COC3/STM1 Circuit Emulation PIC Possible Interfaces (T1 Size)

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Figure 2: 4-Port Channelized COC3/STM1 Circuit Emulation PIC Possible Interfaces (E1 Size)

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Subrate T1 is not supported.

ATM NxDS0 grooming is not supported.

External and internal loopback of T1/E1 (on ct1/ce1 physical interfaces) can be configured using the sonet-options statement. By default, no loopback is configured.

Configuring a Port for SONET or SDH Mode on a 4-Port Channelized COC3/STM1 Circuit Emulation PIC

Each port of the 4-port Channelized COC3/STM1 Circuit Emulation PIC can be independently configured for either SONET or SDH mode. To configure a port for either SONET or SDH mode, enter the [framing (sonet | sdh) statement at the chassis fpc number pic number port number] hierarchy level.

The following example shows how to configure FPC 1, PIC 1, and port 0 for SONET mode and port 1 for SDH mode:

set chassis fpc 1 pic 1 port 0 framing sonetset chassis fpc 1 pic 1 port 1 framing sdh

Or specify the following:

[edit]fpc 1 {pic 1 {port 0 {framing sonet;}port 1 {framing sdh;}}}

Configuring an ATM Interface on a COC1

To create an ATM interface on a COC1, enter the following command:

To create an ATM interface on CAU4, enter the following command:

set interfaces cau4-fpc/pic/port partition interface-type at

Or specify the following:

interfaces {cau4-fpc/pic/port {}}

You can use the show chassis hardware command to display a list of the installed PICs.


Published: 2010-04-20

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