| xiiiResolution: Disable broadcast storm control globally on the Aggregator. . . . . .245Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245Flooded packets on all VLANs are received on a server . . . . . . . . . . . . . . . . . . . .246Symptom: All packets flooded on all VLANs on an Aggregator are received on a server, even ifthe server is configured as a member of only a subset of VLANs. This behavior happensbecause all Aggregator ports are, by default, members of all (4094) VLANs. . .246Resolution: Configure a port that is connected to the server with restricted VLAN membership.246Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246Auto-configured VLANs do not exist on a stacked Aggregator . . . . . . . . . . . . . . . .247Symptom: When an Aggregator is configured and used in a stack, traffic does not flow and theVLAN auto-configuration on all ports is lost. This behavior happens because an Aggregator instacking mode does not support auto-configured VLANs. Only VLANs that were previouslymanually configured are retained on the master stack unit. . . . . . . . . . . . . . . .247Resolution: You must manually configure VLAN membership on each stack-unit port.247Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247Software show Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250Important Points to Remember . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250Running Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250Trace Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251Auto Save on Crash or Rollover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251Show Hardware Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .252Environmental Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253Recognize an Over-Temperature Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255Troubleshoot an Over-Temperature Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . .255Recognize an Under-Voltage Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256Troubleshoot an Under-Voltage Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256Buffer Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257Deciding to Tune Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259Buffer Tuning Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259Using a Pre-Defined Buffer Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262Sample Buffer Profile Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263Troubleshooting Packet Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263Displaying Drop Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264Dataplane Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265Displaying Stack Port Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267Displaying Stack Member Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267Application Core Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268Mini Core Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268TCP Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27023 Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271IEEE Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271
