non-DSA switch device: how to turn off/toggle specific LAN port?

Installing and Using OpenWrt
1

On a Buffalo WZR-HP-AG300H which is, I believe, a non-DSA device, running 23.05.5, I have (not changed from defaults really):

# swconfig dev mdio.0 show
Global attributes:
	enable_vlan: 1
	ar8xxx_mib_poll_interval: 0
	ar8xxx_mib_type: 0
	enable_mirror_rx: 0
	enable_mirror_tx: 0
	mirror_monitor_port: 0
	mirror_source_port: 0
	arl_table: address resolution table

Port 0:
	mib: ???
	pvid: 0
	link: port:0 link:up speed:1000baseT full-duplex txflow rxflow 
Port 1:
	mib: ???
	pvid: 1
	link: port:1 link:up speed:100baseT full-duplex auto
Port 2:
	mib: ???
	pvid: 1
	link: port:2 link:down
Port 3:
	mib: ???
	pvid: 1
	link: port:3 link:down
Port 4:
	mib: ???
	pvid: 1
	link: port:4 link:down
VLAN 1:
	vid: 1
	ports: 0t 1 2 3 4

How can I disable/toggle the link status on port 1 here?

On a DSA device it would have been a straightforward ip link set lan1 down|up or similar, but I can't find the corresponding swconfig or other command line, if one exists, here.

Edit: I somehow managed to miss the doc. Unfortunately it seems this isn't supported on this switch?

# swconfig dev mdio.0 port 1 set disable 1
Unknown attribute "disable"

# swconfig dev mdio.0 help
switch0: mdio.0(Atheros AR8316), ports: 5 (cpu @ 0), vlans: 128
     --switch
	Attribute 1 (int): enable_vlan (Enable VLAN mode)
	Attribute 2 (none): reset_mibs (Reset all MIB counters)
	Attribute 3 (int): ar8xxx_mib_poll_interval (MIB polling interval in msecs (0 to disable))
	Attribute 4 (int): ar8xxx_mib_type (MIB type (0=basic 1=extended))
	Attribute 5 (int): enable_mirror_rx (Enable mirroring of RX packets)
	Attribute 6 (int): enable_mirror_tx (Enable mirroring of TX packets)
	Attribute 7 (int): mirror_monitor_port (Mirror monitor port)
	Attribute 8 (int): mirror_source_port (Mirror source port)
	Attribute 9 (string): arl_table (Get ARL table)
	Attribute 10 (none): flush_arl_table (Flush ARL table)
	Attribute 11 (none): apply (Activate changes in the hardware)
	Attribute 12 (none): reset (Reset the switch)
     --vlan
	Attribute 1 (int): vid (VLAN ID (0-4094))
	Attribute 2 (ports): ports (VLAN port mapping)
     --port
	Attribute 1 (none): reset_mib (Reset single port MIB counters)
	Attribute 2 (string): mib (Get port's MIB counters)
	Attribute 3 (none): flush_arl_table (Flush port's ARL table entries)
	Attribute 4 (int): pvid (Primary VLAN ID)
	Attribute 5 (unknown): link (Get port link information)
2

I don't think that swconfig supports dropping the Ethernet carrier. You could remove the port from all VLANs to prevent the device that is plugged in from having access to any network.

3

Unfortunately dropping the carrier is what I was after. The port is part of a bridge whose layer 3 interface is unmanaged. Another bridge memeber (wireless mesh client) is the logical "master" interface, in that when it drops (and comes up again), I want to force all wired devices hanging off the LAN ports to start DHCP again since their previous addresses may be invalid (network has new address range) unknown (DNS) after an upstream reset or reconfiguration.