Module Capabilities

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

Keep the following points in mind as 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 E-series 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	OCx/STMx with OC3-4 I/O module 4xDS3 ATM	1024	Configurable	20	8,000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
  OCx/STMx ATM	OCx/STMx with OC12 STM4 I/O module	256	Configurable	20	8,000 active 16,000 configured	CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT	CBR, VBR-NRT
  T3 ATM E3 ATM	CT3/T3 E3/ATM	768	Configurable	18	4,000 for 64-MB modules 3,071 for 32-MB modules	UBR, UBR with PCR, VBR-NRT	VBR-NRT

  
  

Line Modules

The following features are supported only on OC3-4 and OC12 line modules:

• NBMA
• Operations, Administration, Management (OAM) alarm cell filter

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 shown in Table 9.

 Table 9:  Configuring virtual channels for specific modules  

 

  No. of Virtual Channels
 Module Type
 Port
 Module
 Router

 OC3-4/STM1

 16,000

 16,000

 64,000


 OC12/STM4

 16,000

 16,000

 64,000


 32-MB E3/T3 ATM

 3,071

 3,071

 64,000


 64-MB E3/T3 ATM

 4,000

 4,000

 64,000



 
 

F4 OAM Support

F4 OAM flows are supported only on the following E-series I/O modules:

• OC3-4, OC12
• T3/E3 ATM

IPv6 Support

ATM line cards support basic, dual-stacked Internet Protocol version 6 (IPv6) on the following E-series I/O modules:

• OC3-4/STM1
• OC12/STM4