With IPHost Network Monitor you can run simple snmp requests against a Huawei device in your network.
dhcpClientState
dhcp Client State
1.3.6.1.4.1.311.1.3.3.1.3
The state of the IP address; one of unused, inuse or reclaim.
Back to AT-DHCP-MIB MIB page.
IPHost Network monitor allows you to monitor dhcpClientState on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Allied Telesis VPN routers right now.