Initial Troubleshooting Checklist - Cisco Nexus 1000V Troubleshooting Manual

Initial Troubleshooting Checklist

S e n d d o c u m e n t c o m m e n t s t o n e x u s 1 k - d o c f e e d b a c k @ c i s c o . c o m .
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Initial Troubleshooting Checklist
Troubleshooting a VLAN problem involves gathering information about the configuration and
connectivity of individual devices and the entire network. In the case of VLANs, begin your
troubleshooting activity as follows:
Checklist
Verify the physical connectivity for any problem ports or VLANs.
Verify that both end devices are in the same VLAN.
The following CLI commands are used to display VLAN information:
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Cisco Nexus 1000V Troubleshooting Guide, Release 4.2(1)SV2(2.1)
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A private VLAN host or promiscuous port cannot be a SPAN destination port. If you configure a
SPAN destination port as a private VLAN port, the port becomes inactive.
A destination SPAN port cannot be an isolated port. (However, a source SPAN port can be an
isolated port.) V
SPAN could be configured to span both primary and secondary VLANs or, alternatively, to span
either one if the user is interested only in ingress or egress traffic.
A MAC address learned in a secondary VLAN is placed in the shared table of the primary VLAN.
When the secondary VLAN is associated to the primary VLAN, their MAC address tables are
merged into one, shared MAC table.
show system internal private-vlan info
show system internal private-vlan event-history errors
show system internal private-vlan event-history traces
show vlan id vlan-id
show vlan private-vlan
show vlan all-ports
show vlan private-vlan type
show vlan internal bd-info vlan-to-bd 1
show vlan internal errors
show vlan internal info
show vlan internal event-history errors
Chapter 12 VLANs
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