Hello,
Has anyone used multiple VLANs on this device?
I've worked on two other similar Buffalo routers (G300NH2, G450H) which both
have the same AR8316 switch in them, and I've used standard UCI configs to
create a separate VLAN.
With the AG300H the default switch_vlan config worries me that port 0 (the CPU)
is set to untagged which I've never seen on these devices before. Of course if
I want a second VLAN, I have to set the CPU port to tagged for both of them.
Once I set the CPU port 0 to tagged (even without creating a second VLAN) the
CPU stops receiving packets. The switch is still operational - I tested it by
creating a second VLAN on two ports to see if traffic passes through, and it
does. But it does not reach the CPU.
With this device, it can be tested rather easily because the WAN/uplink port is
a separate physical interface eth1.
Looking in target/linux/ar71xx/base-files/etc/uci-defaults/network I see that a
lot of switches use this config where the CPU port is not tagged by default.
Am I missing something obvious? Perhaps there's some kernel code that needs to
be patched for this device to expect tagged frames to the CPU?
For reference, the stock config is:
config switch_vlan
option device 'eth0'
option vlan '1'
option ports '0 1 2 3 4'
To make the switch inaccessible, just start tagging on port 0:
config switch_vlan
option device 'eth0'
option vlan '1'
option ports '0t 1 2 3 4'
Or the configuration I was hoping to achieve:
config switch_vlan
option device 'eth0'
option vlan '1'
option vid '1'
option ports '0t 1 2 3 4'
config switch_vlan
option device 'eth0'
option vlan '2'
option vid '2'
option ports '0t 1t'
One final note - clearly someone else noticed this, as in the case where the
default network config was added, the submitter's patch was modified to use
untagged on port 0. See: https://dev.openwrt.org/ticket/9607
Thanks in advance!
Patrick van Staveren
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