Dell PowerEdge M IO Aggregator Command Reference Manual page 13

Resolution: Disable broadcast storm control globally on the Aggregator. . . . . .245
Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Flooded packets on all VLANs are received on a server . . . . . . . . . . . . . . . . . . . .246
Symptom: All packets flooded on all VLANs on an Aggregator are received on a server, even if
the server is configured as a member of only a subset of VLANs. This behavior happens
because all Aggregator ports are, by default, members of all (4094) VLANs. . .246
Resolution: Configure a port that is connected to the server with restricted VLAN membership.
246
Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246
Auto-configured VLANs do not exist on a stacked Aggregator . . . . . . . . . . . . . . . .247
Symptom: When an Aggregator is configured and used in a stack, traffic does not flow and the
VLAN auto-configuration on all ports is lost. This behavior happens because an Aggregator in
stacking mode does not support auto-configured VLANs. Only VLANs that were previously
manually configured are retained on the master stack unit. . . . . . . . . . . . . . . .247
Resolution: You must manually configure VLAN membership on each stack-unit port.247
Steps to Take: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .247
Software show Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248
Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
Important Points to Remember . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
Running Offline Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
Trace Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Auto Save on Crash or Rollover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
Show Hardware Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .252
Environmental Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
Recognize an Over-Temperature Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .255
Troubleshoot an Over-Temperature Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . .255
Recognize an Under-Voltage Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
Troubleshoot an Under-Voltage Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
Buffer Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
Deciding to Tune Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259
Buffer Tuning Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259
Using a Pre-Defined Buffer Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262
Sample Buffer Profile Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263
Troubleshooting Packet Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263
Displaying Drop Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264
Dataplane Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265
Displaying Stack Port Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267
Displaying Stack Member Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267
Application Core Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268
Mini Core Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268
TCP Dumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
23 Standards Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
IEEE Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271
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