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 Dropped Connections
Figure 6-6 PVC VPI and VCI Test in the Example Network
This section contains the following procedures:
• Determining Cell Drop Location
• Checking Line and Circuit Oversubscription
• Checking Traffic Priority
• Checking Network Circuit Timing
For detailed configuration information, see the “Configuring Resource Management” chapter in the ATM
Switch Router Software Configuration Guide.
Determining Cell Drop Location
Use the following command to determine where the cells are being dropped.
Note The recommended procedure is to start at the center of the circuit and work outward until you find
an switch router with mismatched receive and transmit cell counts.
Manufacturing building
Administration building
E-mail and meeting
database servers
DNS server
PVC
(AdminFl1GW)
(AdminFl1Ls1)
(ManuFl1CaS1)
(ManuFl1Ls1)
4/0/1
1/0/0
PNNI
Test 3
Test 1
Test 2
1/1
4/0/0
0/1/0
10294
Command Purpose
show atm vc traffic interface atm card/subcard/port Checks the VCs for interface where cells
are being dropped.