The TCPWave DDI (DNS, DHCP, and IP Address Management) solution offers a flexible DHCP (Dynamic Host Configuration Protocol) solution that supports both the one-to-one model and the hub-spoke model for primary-failover configurations. Here's how TCPWave's DHCP failover protocol works in each of these models:
High Availability
Improved Reliability
Enhanced Scalability
Simplified Management
TCPWave DDI enables the configuration of a primary DHCP server and a failover DHCP server in a one-to-one relationship. The primary server handles DHCP lease allocation and management, while the failover server acts as a backup, ready to take over in case of primary server unavailability. Communication between the servers occurs through the DHCP failover protocol, ensuring synchronization of lease state information, timers, assignments, and renewals in their respective lease databases.
Our DDI supports different failover states, such as NORMAL, COMMUNICATION-INTERRUPTED, PARTNER-DOWN, and RESOLUTION-INTERRUPTED, which define the status of the failover relationship between the primary and failover DHCP servers. Additionally, the primary and failover servers synchronize their DHCP lease databases to ensure consistency. They exchange updates and changes, including lease creations, renewals, and releases, to maintain an up-to-date view of active leases. This synchronization guarantees that both servers have a consistent understanding of leased IP addresses, enabling them to seamlessly take over DHCP operations when necessary.
Our DDI supports a hub-spoke model where a primary DHCP server is connected to multiple failover servers in a hub-spoke topology. The primary server acts as the central hub, while the failover servers serve as spokes, offering DHCP redundancy and load-balancing capabilities. Through the DHCP failover protocol, the primary server communicates with the failover servers, distributing lease assignments across them to achieve load balancing and optimize IP address allocation. This ensures efficient DHCP operations and enhances network reliability in the hub-spoke architecture.
Our DDI intelligently distributes lease requests among the failover servers to balance the load. It monitors the lease utilization of each failover server and adjusts the allocation of new leases accordingly. Additionally, our solution efficiently manages the failover relationship between the primary server and failover servers. It ensures synchronization of lease state and configuration between them, ensuring that the failover servers are always up-to-date. In the event of primary server unavailability, one of the failover servers seamlessly takes over DHCP operations, guaranteeing uninterrupted IP address allocation and maintaining network connectivity.
By offering support for both the one-to-one model and the hub-spoke model, our solution provides flexibility in configuring DHCP failover relationships based on the specific needs of the network environment. The DHCP failover protocol ensures synchronization, load balancing, and failover management to maintain the high availability and reliability of DHCP services.
