Cisco Systems OL-7396-01 Manual De Usuario
25-9
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 25
Configuring ATM Router Module Interfaces
Configuring ATM Router Module Interfaces
•
IP fragmentation.
•
IP 6-path load balancing.
Note
The ATM router module is only supported on ATM switches which have a multiservice ATM switch
processor installed.
processor installed.
Note
The LightStream 1010 system software image does not include support for the ATM router module or
Layer 3 features. You can download this image to a LightStream 1010 ATM switch router with a
multiservice ATM switch processor installed.
Layer 3 features. You can download this image to a LightStream 1010 ATM switch router with a
multiservice ATM switch processor installed.
Configuring ATM Router Module Interfaces
The you can configure the following features directly on the ATM router module interfaces:
•
Maximum virtual channel identifier (VCI) bits
•
Maximum Transmission Units (MTUs) (enhanced Catalyst 8540 MSR)
•
LANE clients (Catalyst 8540 MSR)
•
RFC 1483
•
Classical IP over ATM (RFC 1577)
•
Bridging
•
IP multicast
Note
This document describes how to configure ATM software features combined with Layer 3 features only.
For more detailed information on how to configure the Layer 3 modules that interoperate with the ATM
router module in the Catalyst 8540 MSR chassis, refer to the Layer 3 Switching Software Feature and
Configuration Guide, which is available on the Documentation CD-ROM that came with your ATM
switch router, online at Cisco.com, or when ordered separately as a hard copy document.
For more detailed information on how to configure the Layer 3 modules that interoperate with the ATM
router module in the Catalyst 8540 MSR chassis, refer to the Layer 3 Switching Software Feature and
Configuration Guide, which is available on the Documentation CD-ROM that came with your ATM
switch router, online at Cisco.com, or when ordered separately as a hard copy document.
Note
ATM router modules have internal interfaces, but no external ports. Use the interface atm
card/subcard/port command to specify these interfaces.
card/subcard/port command to specify these interfaces.
Note
Virtual path identifier (VPI) 2 is reserved for ATM router module interfaces, which allows up to 2048
external VCs on each ATM router module interface. Using VPI 0 would have allowed less than 1024
external VCs on an ATM router module interface because the ATM router module external VCs would
have been forced to share the VC space within VPI 0 with the internal PVCs.
external VCs on each ATM router module interface. Using VPI 0 would have allowed less than 1024
external VCs on an ATM router module interface because the ATM router module external VCs would
have been forced to share the VC space within VPI 0 with the internal PVCs.
Even though each ATM router module interface supports a maximum of 2048 VCs, only 1400 to 1500
external VCs can be configured. Internal VCs use up the rest.
external VCs can be configured. Internal VCs use up the rest.