Title: Multiple DHCP servers are detected [Print this page] Author: singcom2011@hot Time: 2025-7-13 03:11 Title: Multiple DHCP servers are detected [strong]Multiple DHCP servers are detected on device G1T07HW001729:[/strong]
A DHCP server is detected on [strong]port 18[/strong], IP:
192.168.110.1
, MAC:
98:4A:6B:9D:A7:0A
, VLAN ID:
1
A second DHCP server is also detected on [strong]port 18[/strong], IP:
192.168.20.1
, MAC:
98:4A:6B3:33:6
, VLAN ID:
20
❓[strong]Why does this happen every time I delete VLAN 20 and recreate it?[/strong]
It seems that after recreating VLAN 20, a new SVI interface and DHCP service are automatically created on the switch, causing DHCP conflicts.
How can I prevent this behavior? Author: v-shaojinren@ru Time: 2025-7-13 09:10
Dear customer,
When creating a VLAN, you can disabled the DHCP pool for the VLAN. You can refer to the guide below regarding more details. https://cloud.ruijienetworks.com/help/#/ArticleList?id=e945f0446ace466b86542e2610c1c96f
You can also disable the DHPC pool on an existing SVI in the device config page. The alarm in your project will be cleared about 9 minutes later after the issue is resolved
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