Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 6 Troubleshooting Switch Router ATM Network Connections
Troubleshooting the PNNI Lowest-level Interface
Checking PNNI Interface Metric Configuration for Lowest-level Interfaces
Use the following commands to check the PNNI interface metric configuration:
Note Some resource metrics are valid only for a subset of the service classes.
Follow these steps to troubleshoot PNNI interface metric configuration and resource availability
information for the lowest-level interfaces:
Step 1 Use the show atm pnni interface atm card/subcard/port detail command to confirm the PNNI interface
metric configuration.
Switch1# show atm pnni interface atm 0/0/0 detail
PNNI Interface(s) for local-node 1 (level=96):
Port ATM0/0/0 RCC is up , Hello state 2way_in with node Switch Error: Port
Looped back
Next hello occurs in 0 seconds, Dead timer fires in 68 seconds
CBR : AW 5040 MCR 155519 ACR 147743 CTD 154 CDV 138 CLR0 10 CLR01 10
VBR-RT : AW 5040 MCR 155519 ACR 155519 CTD 707 CDV 691 CLR0 8 CLR01 8
VBR-NRT: AW 5040 MCR 155519 ACR 155519 CLR0 8 CLR01 8
ABR : AW 5040 MCR 155519 ACR 0
UBR : AW 5040 MCR 155519
Aggregation Token: configured 0 , derived 0, remote 0
Switch#
Step 2 Check the administrative weight (AW) configuration. If the AW value is not what you expect, use the
show running-config command to check the administrative-weight mode (for the ATM router PNNI
configuration on the switch router).
Also, check whether the AW has been configured to a nondefault value for the specific interface.
Step 3 Check the minimum cell rate (MCR) configuration. If the MCR value is not what you expect, check the
port type and port rate, using the show controllers atm card/subcard/port command (for physical
interfaces only).
Step 4 Use the show running-config command to check the ATM pacing configuration. For VP tunnels, check
the configuration of the corresponding PVP connection.
Step 5 Check the available cell rate (ACR), cell transfer delay (CTD), and cell delay variation (CDV)
configuration. Use the show atm pnni resource-info card/subcard/port command to see the significant
change boundaries.
Command Purpose
show atm pnni interface atm card/subcard/port Confirms PNNI interface metric
configuration.
show running-config Confirms administrative weight (AW)
value, which shows the significant change
boundaries.
show controllers atm card/subcard/port Confirms minimum cell rate (MCR)
value, port type, and port rate.
show atm pnni resource-info card/subcard/port Confirms significant change boundaries.