Buenos días
Gracias por tus comentarios Federico Stasyszyn
Pensé que estaba haciendo todo bien, pero luego coloque:
# make && make modules && make modules_install && make install
# genkernel --lvm --install initramfs
# modprobe 8021q
# modprobe: ERROR: could not insert '8021q': Unknown symbol in module, or unknown parameter (see dmesg)
# dmesg
36.699231] 8021q: Unknown symbol vlan_vid_add (err 0)
[ 36.699249] 8021q: Unknown symbol vlan_vid_del (err 0)
[ 36.699275] 8021q: Unknown symbol vlan_uses_dev (err 0)
[ 36.699295] 8021q: Unknown symbol vlan_dev_vlan_id (err 0)
[ 172.164616] 8021q: Unknown symbol vlan_vid_add (err 0)
[ 172.164635] 8021q: Unknown symbol vlan_vid_del (err 0)
[ 172.164662] 8021q: Unknown symbol vlan_uses_dev (err 0)
[ 172.164681] 8021q: Unknown symbol vlan_dev_vlan_id (err 0)
# grep CONFIG_VLAN_8021Q /usr/src/linux/.config
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
CONFIG_VLAN_8021Q_MVRP=y
Gracias a todos por sus comenatrios, que realmente no se por donde buscar el error (bueno sigo mirando a google ;) )