dhcp check-server-pkt
Function
The dhcp check-server-pkt command selects strict or loose check on replay packets received from the DHCPv4 server.
By default, the device conducts strict check on reply packets from the DHCPv4 server.
This command is supported only on the NetEngine 8000 F1A.
Parameters
| Parameter | Description | Value |
|---|---|---|
| loose |
Indicates the loose check of the reply packet from the DHCPv4 server. |
- |
| strict |
Indicates the strict check of the reply packet form the DHCPv4 server. |
- |
| include |
Indicates the option value. |
- |
| option dhcp-option-code |
Specifies the option code. If this parameter is not configured, the device does not conduct loose check on reply packets that do not carry Option 3 from the DHCPv4 server. If this parameter is configured, the device conducts loose check on all reply packets from the DHCPv4 server, including those carrying Option 3. |
Only Option 3 can be specified. |
Usage Guidelines
Usage Scenario
The dhcp check-server-pkt command selects strict or loose check on replay packets received from the DHCPv4 server.
Precautions
In VS mode, this command is supported only in the admin VS.
If the device is configured to perform loose check on the packets sent by the DHCPv4 server and the gateway address in the reply packets sent by the DHCPv4 server is inconsistent with the gateway address of the selected address pool, the device re-selects an address pool whose gateway address is consistent with that in the reply packets sent by the DHCPv4 server in the domain. The gateway mask of the re-selected address pool must be consistent with that configured in the current address pool. After loose check is configured for the packets sent by the DHCPv4 server, if two users have the same IP address but are in different VPNs, the user who attempts to go online later will fail in user access. Therefore, you are advised to use different IP addresses for users in different VPNs for the loose check on the packets sent by the DHCPv4 server.