Troubleshooting Vlans; About Troubleshooting Vlans; Guidelines And Limitations For Troubleshooting Vlans - Cisco Nexus 9000 Series Troubleshooting Manual

Troubleshooting VLANs

This chapter contains the following sections:
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About Troubleshooting VLANs

VLANs provide a method of isolating devices that are physically connected to the same network but are
logically considered to be part of different LANs that do not need to be aware of one another.
You should use only the following characters in a VLAN name:
• a through z or A through Z
• 0 through 9
• - (hyphen) or _ (underscore)

Guidelines and Limitations for Troubleshooting VLANs

Follow these guidelines when configuring VLANs:
• Keep user traffic off the management VLAN; keep the management VLAN separate from user data.
• You can apply different quality of service (QoS) configurations to primary, isolated, and community
• VACLs that apply to the Layer 3 VLAN interface of a primary VLAN automatically apply to the
• If you do not map the secondary VLAN to the Layer 3 VLAN interface of the primary VLAN, you can
About Troubleshooting VLANs, page 51
Guidelines and Limitations for Troubleshooting VLANs, page 51
Initial Troubleshooting VLANs Checklist, page 52
Troubleshooting VLAN Issues, page 53
VLANs.
associated isolated and community VLANs.
have different VACLs for primary and secondary VLANs.
C H A P T E R
Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release 7.x
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