2-4z When you merge two or more IRF systems into one IRF system, a new master unit is elected, andthe new IRF system adopts new configurations accordingly. This may result in the existing systemconfigurations (including the address pools configured for the DHCP servers) being lost. As thenew IRF system cannot inherit the original DHCP server configurations, you need to performDHCP server configurations for it.z When an IRF system is split into multiple new IRF systems, some of the new IRF systems may bedegraded to Layer 2 devices. For a new IRF system degraded to Layer 2 device, although theoriginal DHCP server still exists in the new system, it runs idle for being unable to receive anypackets. When the IRF system restores to a Layer 3 device due to being merged into a new IRFsystem, it adopts the configurations on the new IRF system. And you need to perform DHCPserver configurations if the new IRF system does not have DHCP server-related configurations.z In an IRF system, the UDP HELPER function must be enabled on the DHCP servers that are infabric state.DHCP Server Configuration Task ListComplete the following tasks to configure the DHCP server:Task RemarksEnabling DHCP RequiredConfiguring the Global Address Pool BasedDHCP ServerConfigure addresspool based DHCPserver Configuring the Interface Address PoolBased DHCP ServerOne of the two options isrequiredConfiguring DHCP Server Security Functions OptionalConfiguring DHCP Accounting Functions OptionalEnabling the DHCP Server to Process Option 82 OptionalEnabling DHCPYou need to enable DHCP to make other related configurations take effect.Follow these steps to enable DHCP:To do… Use the command… RemarksEnter system view system-view —Enable DHCP dhcp enable OptionalBy default, DHCP is enabled.
