572 | Layer 2w w w . d e l l . c o m | s u p p o r t . d e l l . c o m Figure 25-6. Server Cluster: Failover and Balancing Preserved with the vlan-flooding CommandEnable and Disable VLAN Flooding• ARP entries already resolved through the VLAN are deleted when the feature is enabled. This ensuresthat ARP entries across the VLAN are consistent.• All ARP entries learned after the feature is enabled are deleted when the feature is disabled, and RP2triggers ARP resolution. The feature is disabled with the command no vlan-flooding.• When a port is added to the VLAN, the port automatically receives traffic if the feature is enabled. OldARP entries are not deleted or updated.• When a member port is deleted, its ARP entries are also deleted from the CAM.• Port channels in the VLAN also receive traffic.• There is no impact on the configuration from saving the configuration.• The feature is not reflected in the output of the show arp command but is reflected in the output of thecommand show ipf fib.The ARP entries exist in the secondary RPM CAM, so failover has no effect on the feature.ClientDatavlan-flooding configured fnC0029mpSource MAC: MACClusterDestination MAC: MACClientSource IP: IPS1Source MAC: MACS1Type: 0x0806Pad CRCEthernet Frame Header ARP ReplyMACS1Server1: IPS1MACS2IPS2Server2:Microsoft Server Cluster: IPClusterMACClusterMACS3IPS3Server3:MACS4IPS4Server4:VLAN 1
