From: Yunsheng Lin > Sent: 21 October 2019 13:26 > Currently the MTU of vlan netdevice is set to the same MTU > of the lower device, which requires the underlying device > to handle it as the comment has indicated: > > /* need 4 bytes for extra VLAN header info, > * hope the underlying device can handle it. > */ > new_dev->mtu = real_dev->mtu; > > Currently most of the physical netdevs seems to handle above > by reversing 2 * VLAN_HLEN for L2 packet len.
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