whether it can communication which S series switches as a gateway, downlink the host subnet mask than its subnet mask longer(larger)

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S series switches (except S1700) as a gateway, the host of downlink subnet mask than its subnet mask loger(larger), the situation of communication between the host as follows:
1) HostS are located on the same network segment of the same VLAN, can communicate normally;
2) Hosts are located on the same network segment with different VLANs, it can be communication with each other by configure the ARP proxy inside VLAN .
3) Hosts belong to different network segments with the sanme VLAN, it can be communication between hosts by configure VLANIF
4) Hosts belong to different network segments and different VLANs, it can be communication between hosts by configure VLAN aggregation

Other related questions:
How to change an interface IP address on an S series switches
You can delete or change an interface IP address on an S series switches (except the S1700) as follows: - To delete the IP address of an interface, run the undo ip address [ ip-address { mask | mask-length } ] command in the interface view. For example: [HUAWEI] interface Vlanif 100 [HUAWEI-Vlanif100] display this # interface Vlanif100 ip address 10.1.1.1 255.255.255.0 # [HUAWEI-Vlanif100] undo ip address [HUAWEI-Vlanif100] display this # interface Vlanif100 # - To change the IP address or subnet mask of an interface, run the ip address ip-address { mask | mask-length } command in the interface view. For example: [HUAWEI] interface Vlanif 100 [HUAWEI-Vlanif100] display this # interface Vlanif100 ip address 10.1.1.1 255.255.255.0 # [HUAWEI-Vlanif100] ip address 10.2.1.1 255.255.0.0 [HUAWEI-Vlanif100] display this # interface Vlanif100 ip address 10.2.1.1 255.255.0.0 #

USG2000 initial settings and subnet mask allocation
The subnet mask of the USG2000 specifies the bits, in the IP address, used for the network or subnet ID as well as for the host ID. The AND operation is performed for the corresponding bits of the 32-bit IP address and the subnet mask, to determine the network ID corresponding to the IP address. Assume that the IP address is 10.1.1.2 and the subnet mask is 255.255.0.0. The result of the AND operation performed for the corresponding bits of the IP address and the subnet mask, that is, 10.1.0.0, is the network address.

A fault occurs on an S series switch when the network IP address/mask and host IP address/mask are configured. Why
Question: Why a fault occurs when I configure the network IP address/mask and host IP address/mask? Answer: You may solve the problem as follows: Ensure that the host is a part of the same network and the mask is correct. Ensure that the IP address and mask of the host can be combined to a network IP address. Ensure that the IP address of the host is unique on the network. Ensure that the IP address of the network is unique in the area.

S series switch subnet network address if can be used as host address
S series switches (except S1700) network address of the subnet can not be the host address. If the host address is configured, an error message will appear:Error:The specified IP address is invalid.

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