What happens if you apply this command "vlan dot1q tag native" ?
A. packet will be dropped
B. packet go to defautl vlan
C. packet go to native vlan
What happens if you apply this command "vlan dot1q tag native" ?
What happens if you apply this command "vlan dot1q tag native" ?
A. packet will be dropped
B. packet go to defautl vlan
C. packet go to native vlan
New CCNP Routing and Switching SWITCH 300-115 Exam Questions:
Vlan dot1q tag native – I have never used this command and would like to get an explanation on why everyone doesn’t use it or enable it by default. My understanding is that, when enabled, the native vlan is tagged just like any other dot1q vlan. I’ve heard that it might be to prevent vlan hopping but I’ve also heard that the reason for untagged native vlan was to pass untagged legacy traffic and low end switches. With tagging of native vlan all untagged frames are dropped, except untagged control frames like CDP, VTP, PaGP, and some untagged flavors of STP. I haven’t found any information that would except vlan 1 from tagging or giving it any special consideration in this command. So it seems to make sense to tag the native vlan. Like so many other obscure Cisco commands you can see where someone has put a lot of thought and effort into building it but drop the ball on deploying it.
https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/nxos/commands/l2/vlan-dot1q-tag-native.html
Based on the above, I would have to say that A is the most logical answer to the following question.
What does the command vlan dot1q tag native accomplish when configured under global configuration?
A. All frames within the native VLAN are tagged, except when the native VLAN is set to 1.
B. It allows control traffic to pass using the non-default VLAN.
C. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).
D. Control traffic is tagged.
Answer: D
If “A” is written in this way – Untagged packets will be dropped, then its correct.. But the word untagged is not mentioned so it is wrong.. The most correct answer is C. Because the packet will be tagged already because of the command and will be go to the default vlan 1 because it is not mentioned that the native vlan was changed to another vlan..
If “A” is written in this way – Untagged packets will be dropped, then its correct.. But the word untagged is not mentioned so it is wrong.. The most correct answer is C. Because the packet will be tagged already because of the command and will go to the default vlan 1 because it is not mentioned that the native vlan was changed to another vlan.
yes A
https://community.cisco.com/t5/switching/native-vlan-tagging/td-p/2267039
So the answer is A?
To maintain the tagging on the native VLAN and drop untagged traffic, use the vlan dot1q tag native command. The switch will tag the traffic received on the native VLAN and admit only 802.1Q-tagged frames, dropping any untagged traffic, including untagged traffic in the native VLAN.
https://www.cisco.com/c/m/en_us/techdoc/dc/reference/cli/nxos/commands/l2/vlan-dot1q-tag-native.html