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Configuring Channelized OC12/STM4 IQE Interfaces (SDH Mode)

The Channelized OC12 IQE PIC configured for SDH mode creates a single channelized STM4 interface. You can configure this interface as unpartitioned using the no-partition statement at the [edit interfaces cstm4-fpc/pic/port] hierarchy level to create a single SDH VC-4-4C interface, or you can partition it into the following OC slices:

• SDH virtual concatenation 4 (VC-4) and channelized AU-4 interfaces (4 interfaces, any combination)
• E3 interfaces from a channelized AU-4 interface (3 interfaces, any combination)
• Channelized E1 or E1 interfaces from a channelized AU-4 interface (63 interfaces, any combination)
• NxDS0 interfaces from a channelized E1 interface

This section describes how to configure the following channelized OC12 IQE interfaces on a Channelized OC12 IQE PIC configured in SDH mode:

Configuring Channelized OC12/STM4 IQE PICs for SDH Mode

The 4-port Channelized OC12 IQE PIC allows SONET/SDH configuration on a per port basis, permitting combinations of SONET and SDH ports on the same PIC. The 1-port Channelized OC12 IQE PIC operates in either SONET or SDH mode only.

To configure a 1-port Channelized OC12 IQE PIC to operate in SDH mode, include the framing sdh statement at the [edit chassis fpc fpc/pic/port] hierarchy level:

This configuration creates interface cstm4-0/2/0.

You can also use the above configuration example to configure all 4 ports of a 4-port Channelized OC12 IQE PIC for SDH mode. To configure individual ports to operate in SDH mode, include the framing sdh statement at the [edit chassis fpc fpc/pic/port] hierarchy level. The following example configures port 2 for SDH mode:

This configuration creates interface cstm4-0/2/2.

For more information, see the Junos OS System Basics Configuration Guide.

Configuring an Unpartitioned SDH (VC-4-4C) Interface on a Channelized OC12/STM4 IQE PIC

On a Channelized OC12 IQE PIC, you can configure one SDH (VC-4-4C) interface. To configure an SDH (VC-4-4C) interface, include the no-partition and interface-type statements at the [edit interfaces cstm4-fpc/pic/port] hierarchy level:

This configuration creates interface so-fpc/pic/port.

Example: Configuring an Unpartitioned SDH (VC-4-4C) Interface

Configure an unpartitioned SDH (VC-4-4C) interface, using partition 1 and OC slices 4 through 6:

This configuration creates the interface so-0/2/0.

Configuring SDH (VC-4) Interfaces on Channelized OC12/STM4 IQE PICs

To configure an SDH (VC-4) interface on a Channelized OC12 IQE PIC, include the partition, oc-slice, and interface-type statements at the [edit interfaces cstm4-fpc/pic/port] hierarchy level, specifying the so interface type:

This configuration creates interface so-fpc/pic/port:channel.

The partition number is the sublevel interface partition index and is correlated with the channel number. For Channelized OC12 IQE PICs, the OC-slice range can be from 1 through 12.

Note: For channelized OC12 IQE interfaces, channel numbering begins with 1 (:1).

The OC-slice range is the range of SONET/SDH slices. For SDH interfaces, the OC-slice range specifies the bandwidth size required for the interface type you are configuring. SDH (VC-4) interfaces must occupy three consecutive OC slices per interface, in one of the following forms:

• 1–3
• 4–6
• 7–9
• 10–12

The interface type is the channelized interface type or data channel you are creating.

Example: Configuring SDH (VC-4) Interfaces

Configure SDH (VC-4) interfaces:

This configuration creates the interfaces so-0/2/0:1 through so-0/2/0:4.

Configuring Channelized AU-4 Interfaces

To configure a channelized AU-4 interface, include the partition, oc-slice, and interface-type statements at the [edit interfaces cstm4-fpc/pic/port] hierarchy level, specifying the cau4 interface type:

This configuration creates interface cau4-fpc/pic/port:channel.

The partition number is the sublevel interface partition index. For SDH interfaces, the partition number is not correlated with bandwidth size. A channelized STM-4 interface can have from 1 through 4 partition numbers.

Note: For channelized OC12 interfaces, channel numbering begins with 0 (:0). For channelized OC12 interfaces (both IQ and IQE), channel numbering begins with 1 (:1).

The OC-slice range is the range of SONET/SDH slices. For SDH interfaces, the OC-slice range specifies the bandwidth size required for the interface type you are configuring. Channelized AU-4 IQ interfaces must occupy three consecutive OC slices per interface, in one of the following forms:

• 1–3
• 4–6
• 7–9
• 10–12

The interface type is the channelized interface type or data channel you are creating.

Example: Configuring Channelized AU-4 Interfaces

Configure channelized AU-4 interfaces, using partitions 1 through 4:

This configuration creates the interfaces cau4-0/2/0:1 through cau4-0/2/0:4.

Configuring E3 Interfaces

To configure E3 interfaces, include the partition and interface-type statements at the [edit interfaces cau4-fpc/pic/port] hierarchy level, specifying the e3 interface type:

This configuration creates the interfaces e3-fpc/pic/port:channel and e3-fpc/pic/port:channel.

Note: Class-of-service (CoS) rules cannot be applied to an individual channel configured on channelized IQE interfaces. You can only apply CoS rules to the aggregate bit streams.

Note: Channelized OC12/STM4 IQ and IQE interfaces in M Series, MX Series, and T Series routers reserve channels 0-3 of each OC12 space for STS3C SONET channels. When you configure E3 or T3 channels in OC12 spaces on the described PICs, Junos OS allocates them starting from channel 4 because channels 0-3 are reserved for four STS3c SONET channels. Channel numbers are allocated sequentially in the following order: 4, 5, 6, 7, 8, 9, 11, 0, 1, 2, 3. Only after channels 4 through 11 of the OC12 space are exhausted (all 4 through 11 configured) for E3 or T3 channels will Junos OS then allocate channel 0-3 space for further E3 or T3 channels; thereby using up the 0-3 space previously reserved for four STS3c SONET channels. If a subsequent reconfiguration of this OC12 space occurs, where you try to replace channels 4-6 or 7-9 with an OC3 SONET channel; it fails because the channel 0-3 space is already occupied by the last E3 or T3 channels configured. This causes a failure in channel allocation and the Device Control Daemon (DCD) keeps retrying forever to configure the channel allocation on the interface. The only resolution is to reconfigure the last configured E3/T3 channels with OC3 channels, to free channels 0-3.

Example: Configuring E3 Interfaces

Configure E3 interfaces, using partition 1:

Configuring E1 or Channelized E1 Interfaces

To configure E1 or channelized E1 interfaces, include the partition and interface-type statements at the [edit interfaces cau4-fpc/pic/port] hierarchy level, specifying the e1 or ce1 interface type:

This configuration creates the interfaces e1-fpc/pic/port:channel and ce1-fpc/pic/port:channel.

Note: Class-of-service (CoS) rules cannot be applied to an individual channel configured on channelized IQE interfaces. You can only apply CoS rules to the aggregate bit streams.

Example: Configuring E1 or Channelized CE1 Interfaces

Configure E1 or channelized CE1 interfaces, using partition 3 and partition 4:

This configuration creates interfaces e1-0/2/0:1:3 and ce1-0/2/0:1:4.

Configuring NxDS0 Interfaces on Channelized OC12/STM4 IQE PICs

Configure channelized NxDS0 interfaces on the channelized E1 interface by including the partition, timeslots, and interface-type statements at the [edit interfaces ce1-fpc/pic/port:channel] hierarchy level, specifying the ds interface type:

This configuration creates the interface ds-fpc/pic/port:channel.

The time-slot range is from 1 through 32. You can designate any combination of time slots. To configure ranges, use hyphens. To configure discontinuous time slots, use commas. You can use a combination of ranges and discontinuous time slots, for example:

Example: Configuring NxDS0 Interfaces

Configure channelized NxDS0 interfaces, using partition 4 and time slots 1 through 10:

This configuration creates interface ds-0/2/0:1:2:4.