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Supported Features

This section describes ATM feature support on E-series modules.

For more information about the physical layer characteristics of the modules described in this section, including the numbering schemes, see the JUNOSe Physical Layer Configuration Guide.

Module Capabilities

The level of support for certain ATM capabilities varies depending on the module. Table 6 lists the specific differences in the capabilities of the modules.

The number of VP tunnels varies with the number of ports in the associated line module. For information about the maximum number of ATM VP tunnels supported per port for all line modules, see JUNOSe Release Notes, Appendix A, System Maximums.

Note: Support for the OC3 (dual port) line module has been deprecated.

Table 6: ATM Capabilities on Line Modules and I/O Modules

Line Module	I/O Module or IOA	Number of VP Tunnels	VPI/VCI Address Range	Configurable Bit Range	Number of VCs on Each Port	ATM Circuit Traffic Management Types	VP Tunnel Traffic Management Types
OCx/STMx ATM	OC3-4 I/O 4xDS3 ATM I/O	1024	Configurable	20	8000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
OCx/STMx ATM	OC12/STM4 I/O	256	Configurable	20	8000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
OC3/STM1 GE/FE	OC3-2 GE APS I/O	1024	Configurable	20	8000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
ES2 4G LM	ES2-S1 OC3-8 STM1 ATM IOA	1 IOA per slot: 2048 2 IOAs per slot: 4096	Fixed VPI: 0–255 VCI: 0–65535	–	8000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
ES2 4G LM	ES2-S1 OC12-2 STM4 ATM IOA	1 IOA per slot: 512 2 IOAs per slot: 1024	Fixed VPI: 0–255 VCI: 0–65535	–	8000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT

Virtual Channel Support

The number of virtual channels (VCs) that the router supports on each port varies depending on the E-series router and module you are using. For information about the maximum number of ATM VCs supported per chassis, per module, and per port, see JUNOSe Release Notes, Appendix A, System Maximums.

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