If the IP Address cannot be obtained by ES directly connecting to the DHCP server, you can check it according to the following steps. 1.If VLAN settings are not enabled, you can try to enable VLAN settings.  2. Check whether DHCP Snooping is enabled. If it is enabled, you need to set the upstream interface to the trusted interface.  3. Set ES to Static IP address to test whether the gateway address can be pinged  If you can't ping, please check whether the VLAN Settings are turned on, and check whether the VLAN in the IP Settings and the Native VLAN in the uplink interface are the same.    4.Check if the address pool in the DHCP server is exhausted |
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