Dell N3200-ON Networking N-Series Switches User Guide version 6.8.0 - Page 216

Table 8-1. Applications that Checkpoint Data Application iSCSI LLDP OSPFv2 OSPFv3 Route Table Manager SIM Voice VLAN Checkpointed Data Connections List of interfaces with MED devices attached Neighbors and designated routers Neighbors and designated routers IPv4 and IPv6 dynamic routes The system's MAC addresses. System up time. IP address, network mask, default gateway on each management interface, DHCPv6 acquired IPv6 address. VoIP phones identified by CDP or DHCP (not LLDP) Switch Stack MAC Addressing and Stack Design Considerations The switch stack uses the MAC addresses assigned to the management unit in the stack. NOTE: Each switch is assigned four consecutive MAC addresses. A stack of switches uses the MAC addresses assigned to the management unit in the stack. If the backup unit assumes control due to a management unit in the stack failure or warm restart, the backup unit continues to use the MAC addresses of the original management unit in the stack. This reduces the amount of disruption to the network because ARP and other Layer-2 entries in neighbor tables remain valid after the failover to the backup unit. Stack units should always be connected with a ring topology (or other redundant topology), so that the loss of a single stack link does not divide the stack into multiple stacks. If a stack is partitioned such that some units lose all connectivity to other units, then both parts of the stack start using the same MAC addresses. This can cause severe problems in the network. If removing the management unit in the stack from a stack for use in a different place in the network, make sure to power down the whole stack before redeploying the management unit in the stack so that the stack members do not continue to use the MAC address of the redeployed primary switch. 216 Stacking