Can multiple FE interfaces be grouped into a LAN

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Multiple FE interfaces can be grouped into a LAN provided that the interfaces are grouped into a VLAN.

Other related questions:
Can VLANs be configured on an FE interface?
As a Layer 2 interface, an FE interface supports VLAN configuration.

Can an IP address be configured for an FE interface on an AR
FE interfaces are classified into Layer 2 interfaces and Layer 3 interfaces. You can configure IP addresses for Layer 3 FE interfaces. Some FE interfaces can switch between Layer 2 and Layer 3 modes. For example, Ethernet0/0/0 on AR150&AR200 works in Layer 2 mode by default. Run the undo portswitch command to switch from Layer 2 mode to Layer 3 mode. After an FE interface is switched to Layer 3 mode, you can configure IP addresses for the interface.

Whether multiple S series switches can form a VRRP group
S600-E series switches do not support VRRP. S series switches (S1700 excluded) support a VRRP group composed of one master and multiple backups. Typically, VRRP is configured on two devices.

Whether DHCP can be configured on the intranet LAN interface of the AR
The DHCP server can be configured on a Layer 3 interface of the Huawei AR to allocate IP addresses to users connected to the Layer 3 interface. In practice, an interface connected to the intranet is enabled with the DHCP server and allocates intranet IP addresses to intranet users. The interface connected to the public network has NAT enabled to communicate with the public network.

Does an AR router support an interface being switched over between Layer 2 and Layer 3
The following AR routers support an interface being switched over between Layer 2 and Layer 3. By default, Ethernet interfaces are Layer 2 interfaces. Run the undo portswitch command to switch the interfaces from Layer 2 mode to Layer 3 mode, and run the portswitch command to switch the interfaces back to Layer 2 mode. V200R006C00 and earlier versions: - AR150 and AR200 series: Eth0/0/0 - AR120-S series: Eth0/0/0~Eth0/0/3 - AR150-S, AR160-S, and AR200-S series (except for AR151-S2): Eth0/0/0 - AR151-S2: GE0/0/0 - AR160 series: GE0/0/0 - AR1220F: Eth0/0/0~Eth0/0/7 - AR2201-48FE, AR2202-48FE, and AR2201-48FE-S: Eth0/0/0 and Eth0/0/47 V200R007C00: - AR120 and AR150 series, AR120-S series, AR151-S, AR151W-P-S, and AR151G-U-S: Eth0/0/0~Eth0/0/3 - AR160 series, AR509G-L-D-H, AR110-S series, AR151-S2 and AR160-S series: GE0/0/0~GE0/0/3 - AR200 series, AR1220, AR1220V, AR1220W, AR1220VW, AR1220F, AR200-S series, AR1220-S, AR1220W-S, and AR1220F-S: Eth0/0/0~Eth0/0/7 - AR1220C, AR1220E, AR1220EV, AR1220EVW, and AR1220E-S: GE0/0/0~GE0/0/7 - AR2201-48FE and AR2202-48FE: Eth0/0/0~Eth0/0/47 - AR2204-51GE-P: GE0/0/3~GE0/0/50 - AR2204-27GE-P, AR2204-27GE, and AR2201-48FE-S: GE0/0/3~GE0/0/26 V200R008C00: - AR120 (except for AR129CGVW-L) and AR150 series, AR120-S series, AR151-S, AR151W-P-S, and AR151G-U-S: Eth0/0/0~Eth0/0/3 -AR100 series, AR160 series, AR129CGVW-L, AR503EW, AR503EDGW-Lc, AR509CG-Lt, AR509CG-Lc, AR509G-Lc, AR515GW-LM9-D and AR509G-L-D-H, AR100-S series, AR110-S series, AR151-S2 and AR160-S series: GE0/0/0~GE0/0/3 - AR200 series, AR1220, AR1220V, AR1220W, AR1220VW, and AR1220F, AR200-S series, AR1220-S, AR1220W-S, and AR1220F-S series: Eth0/0/0~Eth0/0/7 - AR1220C, AR1220E, AR1220EV and AR1220EVW, and AR1220E-S: GE0/0/0~GE0/0/7 - AR2201-48FE, AR2202-48FE, and AR2201-48FE-S: Eth0/0/0 and Eth0/0/47 - AR2204-51GE-P, AR2204-51GE-R, and AR2204-51GE: GE0/0/3~GE0/0/50 - AR2204-27GE-P and AR2204-27GE: GE0/0/3~GE0/0/26 At present, the interfaces of all cards do not support Layer 2 and Layer 3 interface switchover.

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