How to reset the address pool on the AR

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If the IP addresses in the address pool cannot be released (when repeated IP address assignment causes IP address conflicts), you can reset a specified IP address pool. Method used to reset the address pool:
-  for global address pool
<Huawei> reset ip pool name pool1 all //Reset the global address pool. pool1
-  For the interface address pool
<Huawei> reset ip pool interface vlanif100 all //Reset the interface address pool.
Note: After the reset ip pool command is run, a user may be disconnected if its IP address is within the address range specified in this command.

Other related questions:
Reset an IP address pool
You can manually reclaim IP addresses that fail to be released due to exceptions after they are allocated by a DHCP server. 
If an IP address conflict occurs because an IP address is allocated to two clients, run the following command to reset the conflicting IP address: 
<HUAWEI> reset ip pool name pool1 conflict

How is address pool configured on an AR
When a DHCP server needs to be redeployed, you need to migrate the address pool on the DHCP server to another DHCP server on the live network. To retain the addresses that have been assigned to clients from a global address pool, run the lock command to lock the global address pool. After the lock command is run, the specified IP address pool is locked and IP addresses in this address pool cannot be assigned to clients. When new users get online after the address pool is migrated, they apply for IP addresses from a new address pool. Perform the following configuration: [Huawei] ip pool global1 [Huawei-ip-pool-global1] lock

How is global address pool modified on an AR
A Huawei AR allows the global address pool to be changed using command lines. Assume that the global address pool is on the network segment 10.1.1.0/24 and the network segment needs to be changed to 10.1.2.0/24. Perform the following configurations: [Huawei] ip pool pool1 [Huawei-ip-pool-pool1] undo network //Delete the original network segment. [Huawei-ip-pool-pool1] network 10.1.2.0 mask 255.255.255.0 //Configure the current network segment.

How to modify the router AR address pool address range?
AR router can configure the NAT address pool via the "NAT address-group" command. Delete the NAT address pool by executing the "undo NAT address-group" command. If you need to modify the NAT address pool address range 10.1.1.1~10.1.1.10 to 10.1.1.1~10.1.1.20, the specific configuration is as follows: 1 first delete the existing NAT address pool [Huawei] undo address-group NAT 1 2 configure the NAT address pool range of 10.1.1.1~10.1.1.20 [Huawei] NAT address-group 1 10.1.1.1 10.1.1.20

Methods used to configure the excluded IP address on the AR
During network planning, some IP addresses in an address pool may be used by servers or other hosts, or some clients can be configured with specified IP addresses only because of special requirements. In this case, you need to exclude these IP addresses that cannot be automatically allocated from the address pool, preventing IP address conflicts. Assume that IP addresses in the range of 10.10.10.11 to 10.10.10.20 cannot be dynamically allocated. The configuration on the AR is as follows: - Interface address pool [Huawei] dhcp enable [Huawei] interface gigabitethernet 1/0/1 //Enter the view of the interface connected to the DHCP clients. [Huawei-GigabitEthernet1/0/1] undo portswitch [Huawei-GigabitEthernet1/0/1] ip address 10.10.10.10 24 [Huawei-GigabitEthernet1/0/1] dhcp select interface [Huawei-GigabitEthernet1/0/1] dhcp server excluded-ip-address 10.10.10.11 10.10.10.20 - Global address pool [Huawei] dhcp enable [Huawei] interface gigabitethernet 1/0/1 //Enter the view of the interface connected to the DHCP clients. [Huawei-GigabitEthernet1/0/1] undo portswitch [Huawei-GigabitEthernet1/0/1] ip address 10.10.10.10 24 [Huawei-GigabitEthernet1/0/1] dhcp select global [Huawei-GigabitEthernet1/0/1] quit [Huawei] ip pool global1 [Huawei-ip-pool-global1] network 10.10.10.0 mask 24 [Huawei-ip-pool-global1] excluded-ip-address 10.10.10.11 10.10.10.20

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