[FS#612] WAN to LAN leakage on MT7620 devices

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FS#612 - WAN to LAN leakage on MT7620 devices
User who did this - Mikael Broström (sweroam-mibr)

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I have this issue also, and also a other problem.  the default port-map like llllw or wllll etc will create leak between lan ports also. 
causing loops, err-disabled or spanning-tree issues.  

I use some port as trunk ports later in openwrt... 

i wrote a test patch to the driver that does the following config instead of dts wllll or llllw etc..:
enable_vlan=1
port0=vlan0
port1=vlan1
port2=vlan2
port3=vlan3
port4=vlan4
port5=vlan5
port6=vlan6
port7=vlan7
....
portX=vlanX
....

this is the result that openwrt gets before the switch is initialized..

result:
/ # swconfig dev switch0 show|grep -e link -e pvid -e vlan
 enable_vlan: 1
 pvid: 0
 link: port:0 link:down
 pvid: 1
 link: port:1 link:down
 pvid: 2
 link: port:2 link:down
 pvid: 3
 link: port:3 link:down
 pvid: 4
 link: port:4 link:down
 pvid: 5
 link: port:5 link:down
 pvid: 6
 link: port:6 link:up speed:1000baseT full-duplex 
 pvid: 7
 link: port:7 link:down

it works well to prevent leak between all ports on init (fixes: lan to wan lek, lan to lan leak)

i then let openwrt initialize the switch using my configuration.. with correct cpu port and config.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=612#comment8638

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