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 PNNI Hierarchical Networks
Follow these steps to troubleshoot the port on the LGN:
Step 1 Use the show atm pnni interface local-node node-index command to check the induced port on
the LGN.
Step 2 If the interface port does not appear up, see the “Troubleshooting PNNI SVCC-RCC and Higher-level
Links” section on page 6-42.
Checking Link Aggregation
Use the following commands to check link aggregation:
Follow these steps to troubleshoot the aggregated metrics along with the border node interface metrics
for each aggregation token:
Step 1 Use the show atm pnni aggregation link border-detail command to confirm per-service class
aggregation mode.
Step 2 Check the per-service class aggregation mode (best-link or aggressive). The aggregation mode can be
changed to control the resulted aggregated metrics.
• If the aggregated metrics are inaccurate because of the contribution of one or more border node
interfaces that are significantly different from all others, new aggregation tokens can be configured
to treat those aggregated links separately at the higher-level.
• If the contribution from a border node interface is not as expected, check the border node uplink
PTSE, using the show atm pnni database n detail command where n is the node number of the
border node.
Step 3 Use the same show atm pnni database n detail command entered on the border node switch router to
verify the same uplink PTSE information.
• If the two show atm pnni database n detail commands display significantly different information,
see the “Troubleshooting the PNNI Database” section on page 6-30. Otherwise, see “Checking
PNNI Interface Metric Configuration for Lowest-level Interfaces” section on page 6-40.
• If the border node is a higher-level LGN with an induced uplink, check the link aggregation at the
next lower hierarchy level on the switch router acting as the border node.
Command Purpose
show atm pnni aggregation link border-detail Confirms per service class aggregation
mode (best-link or aggressive).
show atm pnni database internal-node-number
detail
Confirms uplink PTSEs.