Nexus 7k and native vlan 1

[chuck-jenkins]

Hi, is it recommended to use a native vlan other than 1 on the trunks connecting Nexus box's. It used to be that you should not use native vlan 1 on the trunks between switches. Is this not an issue anymore.

Thanks

[Reza Sharifi]

Hi,

It is still recommended not to use native vlan 1 and change it to a different number.

HTH

[amandes2]

Hi Chuck,

It is recomended to use a different vlan other than vlan 1 as your default vlan.

This is one of the best practices for secure the overall network.

For eg.

In a switch spoofing attack, an attacking host imitates a trunking  switch by speaking the tagging and trunking protocols (e.g. Multiple  VLAN Registration Protocol, IEEE 802.1Q, VLAN Trunking Protocol) used in  maintaining a VLAN. Traffic for multiple VLANs is then accessible to  the attacking host. 

HTH,

Aman