Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 13 Troubleshooting ATM Router Module Connections
Troubleshooting OAM on ATM Router Module Connections
If you determine that RFC 1577 on the interface is configured incorrectly, refer to the “Configuring IP
over ATM” chapter in the ATM Switch Router Software Configuration Guide.
Troubleshooting OAM on ATM Router Module Connections
OAM performs fault management and performance management functions at the ATM
management (M)-plane layer.
Note Current OAM implementation supports only the fault management function, which includes
connectivity verification and alarm surveillance.
The ATM switch router has full support for the following ATM OAM cell flows:
• F4 flows—OAM information flows between network elements (NEs) used within virtual paths, to
report an unavailable path or a virtual path (VP) that cannot be guaranteed.
• F5 flows—OAM information flows between NEs used within virtual connections, to report
degraded virtual channel (VC) performance such as late arriving cells, lost cells, and cell insertion
problems.
Both F4 and F5 flows can be configured as either end-to-end loopback or segment-loopback and used
with alarm indication signal (AIS) and remote defect indication (RDI) functions.
Troubleshooting OAM Problems on the ATM Router Module Commands
To display the ATM router module and OAM configuration, use the following commands:
To configure OAM on the ATM router module, refer to the “Configuring Operation, Administration, and
Maintenance” chapter in the ATM Switch Router Software Configuration Guide.
Figure 13-11 is an example network of a switch router with an ATM router module having OAM
configured on the ATM router module and the connecting ATM interfaces.
Command Purpose
show atm traffic Displays the ATM layer traffic
information for all of the ATM interfaces.
show atm vc interface atm
card/subcard/port.subinterface VPI VCI
Displays the ATM layer connection
information about the virtual connection.
show atm vc traffic interface atm
card/subcard/port VPI VCI
Displays information about the ATM
virtual connection.