How is address pool configured on an AR

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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

Other related questions:
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 to reset the address pool on the AR
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.

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

The packets sent to an IP address in a configured NAT address pool are discarded
Q: The packets sent to an IP address in a configured NAT address pool are discarded. You can run the ip route-static command to configure a static route to the IP address. The default priority of a static route is 60, which is higher than that of the UNR. This prevents packets sent to an IP address in the address pool from being discarded. The causes are as follows: After a NAT address pool is configured on an interface, a 32-bit local user network route (UNR) is automatically generated, and its priority is 64. When a packet to be sent to an IP address in the address pool passes the router, it matches the 32-bit local UNR and is sent to the protocol stack. However, the router cannot forward the packet because it does not have the protocol stack of the IP address. The packet is discarded. Therefore, you need to configure a static route with the default priority higher than that of the UNR.

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