Vlans - Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual

VLANs

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 5 k - d o c f e e d b a c k @ c i s c o . c o m .
Perform a shut/no-shut operation on the host interface and send the join again.
Multicast traffic is being flooded in a VPC setup
In a VPC setup multicast traffic is being flooded.
Possible Cause
IGMP snooping is disabled on one of the switches.
Solution
Enable IGMP snooping on both switches.
Groups for link local IP addresses (that is, 224.0.0.X) are not created.
Note
VLANs
Nexus 5000 does not have the same VLANs as switch running VTP server
VLANs for the Nexus 5000 are not the same as for the switch running the VTP server.
Possible Cause
The Nexus 5000 currently supports VTP only in transparent mode (4.2(1)N1(1) and later releases).
Solution
This situation indicates that VLANs must be configured locally. However a VTP client and server can
both communicate through a Nexus 5000 by using the following commands:
switch(config)# feature vtp
switch(config)# vtp mode transparent
switch(config)# exit
switch# show vtp status
VLAN cannot be created
A VLAN cannot be created.
Possible Cause
An internal VLAN range is used.
Solution
Use a VLAN number that is not being reserved for internal use.
The VLAN range of 3968 to 4047 is reserved for internal use.
Note
Example:
switch(config)# vlan ?
Cisco Nexus 5000 Series Troubleshooting Guide
3-6
Chapter 3 Troubleshooting Layer 2 Switching Issues
OL-25300-01