Reason for high CPU usage when an S series switch functions as a DHCP relay agent

When an S series switch functions as a DHCP relay agent, multiple VLANs need to be configured on the switch if the switch needs to forward DHCP Request messages of clients on multiple network segments. When the switch receives a DHCP Request message from a client, it queries and matches the VLAN ID to determine the gateway IP address of the client. If the VLAN ID is large, many CPU resources are consumed, causing a high CPU usage.
In practice, the switch used as a DHCP relay agent should not allocate addresses to clients on multiple network segments, and the VLAN ID should be small. To assign IP addresses to many users, configure multiple DHCP relay agents.

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