Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 994
Troubleshooting Packet Loss, Displaying Drop Counters
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OID String .1.3.6.1.4.1.6027.3.27.1.4 .1.3.6.1.4.1.6027.3.27.1.5 .1.3.6.1.4.1.6027.3.27.1.6 OID Name dellNetFpPacketBufferTable dellNetFpStatsPerPortTable dellNetFpStatsPerCOSTable Troubleshooting Packet Loss Description View the modular packet buffers details per stack unit and the mode of allocation. View the forwarding plane statistics containing the packet buffer usage per port per stack unit. View the forwarding plane statistics containing the packet buffer statistics per COS per port. The show hardware stack-unit command is intended primarily to troubleshoot packet loss. To troubleshoot packet loss, use the following commands. • show hardware stack-unit stack-unit-number cpu data-plane statistics • show hardware stack-unit stack-unit-number cpu party-bus statistics • show hardware stack-unit stack-unit-number drops unit unit-number • show hardware stack-unit stack-unit-number unit unit-number {counters | details | port-stats [detail] | register | ipmc-replication | table-dump} • show hardware {ip | ipv6 | mac} {eg-acl | in-acl} stack-unit stack-unit-number port-set 0 pipeline 0-3 • show hardware ip qos stack-unit stack-unit-number port-set 0 • show hardware system-flow layer2 stack-unit stack-unit-number port-set 0 {counters | pipeline 0-3} • show hardware drops interface interface • show hardware buffer-stats-snapshot resource interface interface • show hardware buffer inteface interface{priority-group { id | all } | queue { id| all} } buffer-info • show hardware buffer-stats-snapshot resource interface interface{priority-group { id | all } | queue { ucast{id | all}{ mcast {id | all} | all} • show hardware drops interface interface • clear hardware stack-unit stack-unit-number counters • clear hardware stack-unit stack-unit-number unit 0-1 counters • clear hardware stack-unit stack-unit-number cpu data-plane statistics • clear hardware stack-unit stack-unit-number cpu party-bus statistics Displaying Drop Counters To display drop counters, use the following commands. • Identify which stack unit and port pipe is experiencing internal drops. show hardware stack-unit stack-unit-number drops [unit unit-number] • Identify which interface is experiencing internal drops. show hardware drops interface interface Example of the show hardware stack-unit Command to View Drop Counters Statistics Dell#show hardware stack-unit 0 drops UNIT No: 0 Total Ingress Drops :0 Total IngMac Drops :0 Total Mmu Drops :0 Total EgMac Drops :0 Total Egress Drops :0 UNIT No: 1 Total Ingress Drops :0 994 Debugging and Diagnostics
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