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Module Capabilities

The level of support for certain ATM capabilities varies depending on the module. Table 1-5 shows the specific differences in the capabilities of the modules.



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

Table 1-5 ATM capabilities on line modules and I/O modules  
Line Module
I/O Module
Number of VP Tunnels1
VPI/VCI Address Range
Configurable Bit Range
Number of VCs on Each Port
Traffic Management Types
OCx/STMx ATM
OCx/STMx with OC3-4 I/O module
1024
Configurable
20
8,000 active
16,000 configured
CBR, UBR, UBR with PCR, VBR-NRT, VBR-RT
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
T3 ATM
E3 ATM
OCx/STMx ATM
CT3/T3
E3/ATM2
4xDS3 ATM
768
Configurable
18
4,000 for 64-MB modules
3,071 for 32-MB modules
UBR, UBR with PCR, VBR-NRT

Line Modules

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

Virtual Channel Support

The system 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 1-6.

Table 1-6 Configuring virtual channels for specific modules  
         No. of Virtual Channels
Module Type
Port
Module
System
OC3-4/STM1
16,000
16,000
64,000
OC12/STM4
16,000
16,000
32-MB E3/T3 ATM
3,071
3,071
64-MB E3/T3 ATM
4,000
4,000

F4 OAM Support

F4 OAM flows are supported only on the following ERX I/O modules:

IPv6 Support

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

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