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Vlanif vs Sub-interface

Vlanif vs Sub-interface

Created: May 16, 2020 20:02:31Latest reply: May 16, 2020 20:11:48 324 1 0 0 0
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I know that sub-interfaces like VLANIF can terminate Layer 2 packets and forward Layer 3 packets. If Layer 2 packets do not need to traverse the device, in what situations is VLANIF better to use? And what is the advantage of the Layer 3 sub-interface?

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albertsilva
Created May 16, 2020 20:11:48

Hello,

I recommend using Layer 2 Interface (VLANIF) when VRRP packets need to be transmitted between two devices, in other scenarios it is recommended to use sub-interfaces.


If only the secondary interface is used, the device maintains the ARP table. If a VLANIF interface is configured, the device also needs to maintain the MAC address table.

I hope I have helped, best regards.


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albertsilva
albertsilva Created May 16, 2020 20:11:48

Hello,

I recommend using Layer 2 Interface (VLANIF) when VRRP packets need to be transmitted between two devices, in other scenarios it is recommended to use sub-interfaces.


If only the secondary interface is used, the device maintains the ARP table. If a VLANIF interface is configured, the device also needs to maintain the MAC address table.

I hope I have helped, best regards.


View more
  • x
  • convention：
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