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Configuring SONET/SDH Interface Speed

You can configure the speed of SONET/SDH interfaces on next-generation SONET/SDH Type 1 and Type 2 PICs with SFP. The speed you select is dependent upon whether the PIC is in concatenated or nonconcatenated mode. In concatenated mode, the bandwidth of the interface is in a single channel. In nonconcatenated mode, the PIC operates in channelized (multiplexed) mode.

Table 57 shows the mode combinations for the next-generation SONET/SDH Type 1 PICs with SFP.

Table 57: Type 1 PIC Mode Combinations

PIC	Mode	Speed Configuration	Default Mode
2-port OC3	2xOC3 concatenated	`fpc/pic/0 speed oc3`	Concatenated
4-port OC3	1xOC12 concatenated	`fpc/pic/0 speed oc12`
	1xOC12 nonconcatenated	`fpc/pic/0:0 speed oc3`	Nonconcatenated
	4xOC3 concatenated	`fpc/pic/port speed oc3`	Concatenated
1-port OC12	1xOC12 concatenated	`fpc/pic/0 speed oc12`	Concatenated
	1xOC12 nonconcatenated	`fpc/pic/0:0 speed oc3`	Nonconcatenated
	1xOC3 concatenated	`fpc/pic/0 speed oc3`

Table 58 shows the mode combinations for the next-generation SONET/SDH Type 2 PICs with SFP.

Table 58: Type 2 PIC Mode Combinations

PIC	Mode	Speed Configuration	Default Mode
1-port OC48	1xOC48 concatenated	`fpc/pic/0 speed oc48`	Concatenated
	1xOC48 nonconcatenated	`fpc/pic/0:0 speed oc12`	Nonconcatenated
	1xOC12 concatenated	`fpc/pic/0 speed oc12`
	1xOC12 nonconcatenated	`fpc/pic/0 0 speed oc3`
	1xOC3 concatenated	`fpc/pic/0 speed oc3`
4-port OC12	1xOC48 concatenated	`fpc/pic/0 speed oc48`
	1xOC48 nonconcatenated	`fpc/pic/0:0 speed`	Nonconcatenated
	1xOC12 nonconcatenated	`fpc/pic/0 speed oc3`
	4xOC12 concatenated	`fpc/pic/port speed oc3\|oc12`	Concatenated
4-port OC3	1xOC12 concatenated	`fpc/pic/0 speed oc12`
	1xOC12 nonconcatenated	`fpc/pic/0:0 speed oc3`	Nonconcatenated
	4xOC3 concatenated	`fpc/pic/port speed oc3`	Concatenated

By default, SONET/SDH PICs operate in concatenated mode. To specify interface speed in concatenated mode, include the speed statement with options at the [edit interfaces so-fpc/pic/port] hierarchy level:



[edit interfaces so-fpc/pic/port


speed (oc3 | oc12 | oc48);

For example, each port of 4-port OC12 PIC can be configured to be in OC3 or OC12 speed independently when this PIC is in 4xOC12 concatenated mode.

To specify interface speed in nonconcatenated mode, include the speed statement at the [edit interfaces so-fpc/pic/port.channel] hierarchy level:



[edit interfaces so-fpc/pic/port.channel]

speed (oc3 | oc12);

To configure the PIC to operate in channelized (multiplexed) mode, include the no-concatenate statement at the [edit chassis fpc slot-number pic pic-number] hierarchy level.

For more information about using the non-concatenate statement, see the JUNOS System Basics Configuration Guide.

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