In hot standby mode, only the active server responds. In case of load balance mode, the servers will hash the MAC address of a DHCP client to establish which of them must respond. However, only one server responds to the client messages. In DHCP failover, the client messages which are broadcast are received by both the DHCP failover servers. It took a while, but we found the cause of the problem: When we switched to second DHCP server, clients that were able to receive from first server were now not able to have IP address allocated. We chose one of the DHCP servers, but noticed that some users were not able to receive IP addresses (error appears on client and in logs). We have a pair of Windows DHCP servers which distribute IP addresses to all different clients in the LAN (telephones and computers).Ĭheckpoint only allows defining one DHCP server in Office Mode configuration. While implementing OM IP allocation for VPN users, we discovered an issue with having a DHCP server allocate IP addresses.
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