Supported Modules and 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 JUNOSe Physical Layer Configuration Guide.

For information about the protocols and applications that ATM modules support on ERX-7xx models, ERX-14xx models, and the ERX-310 router, see E-series Module Guide, Appendix A, Module Protocol Support.

Module Capabilities

The level of support for certain ATM capabilities varies depending on the module. Table 8 lists the specific differences in the capabilities of the modules.

Keep the following points in mind when you review Table 8:

• 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.
• Traffic rates (for tunnels or circuits) on T3/E3 ATM modules must be a minimum of 64 Kbps.
  

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

  
  
  
  
  Table 8: ATM Capabilities on Line Modules and I/O Modules  

  Line Module	I/O Module	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
  T3 ATM E3 ATM	CT3/T3 I/O E3 I/O	768	Configurable	18	4000 for 64-MB modules 3071 for 32-MB modules	UBR, UBR with PCR, VBR-NRT	VBR-NRT

  
  

Virtual Channel Support

The router supports up to 16,000 virtual channels on each port (for a total of 64,000 VCs), depending on the type of module and how much memory it has, as listed in Table 9.

 Table 9:  Configuring Virtual Channels for Specific Modules 

 

  Number of Virtual Channels
 Module Type
 Port
 Module
 Router

 OCx/STMx ATM line module with OC3-4 I/O module

 16,000

 16,000

 64,000


 OCx/STMx ATM line module with OC12/STM4 I/O module

 16,000

 16,000

 64,000


 OC3/STM1 GE/FE line module with OC3-2 GE APS I/O module 

 16,000

 16,000

 64,000


 T3 ATM line module with CT3/T3 I/O module (32-MB)
 E3 ATM line module with E3 I/O module (32-MB)

 3071

 3071

 64,000


 T3 ATM line module with CT3/T3 I/O module (64-MB)
 E3 ATM line module with E3 I/O module (64-MB)

 4000

 4000

 64,000